General Description
The MAX4188/MAX4189/MAX4190 are low-power,
current-feedback video amplifiers featuring fast dis-
able/enable times and low switching transients. The
triple MAX4188 and the single MAX4190 are optimized
for applications with closed-loop gains of +2V/V (6dB)
or greater and provide a -3dB bandwidth of 200MHz
and 185MHz, respectively. The triple MAX4189 is opti-
mized for closed-loop applications with gains of +1V/V
(0dB) or greater and provides a 250MHz -3dB band-
width. These amplifiers feature 0.1dB gain flatness up to
80MHz with differential gain and phase errors of 0.03%
and 0.05°. These features make the MAX4188 family
ideal for video applications.
The MAX4188/MAX4189/MAX4190 operate from a +5V
single supply or from ±2.25V to ±5.5V dual supplies.
These amplifiers consume only 1.5mA per amplifier and
are capable of delivering ±55mA of output current, making
them ideal for portable and battery-powered equipment.
The MAX4188/MAX4189/MAX4190 have a high-speed
disable/enable mode that isolates the inputs, places the
outputs in a high-impedance state, and reduces the
supply current to 450µA per amplifier. Each amplifier
can be disabled independently. High off isolation, low
switching transient, and fast enable/disable times
(120ns/35ns) allow these amplifiers to be used in a
wide range of multiplexer applications. A settling time
of 22ns to 0.1%, a slew rate of up to 350V/µs, and low
distortion make these devices useful in many general-
purpose, high-speed applications.
The MAX4188/MAX4189 are available in a tiny 16-pin
QSOP package, and the MAX4190 is available in a
space-saving 8-pin µMAX®package.
Applications
High-Definition Surveillance Video
High-Speed Switching/Multiplexing
Portable/Battery-Powered Video/Multimedia
Systems
High-Speed Analog-to-Digital Buffers
Medical Imaging
High-Speed Signal Processing
Professional Cameras
CCD Imaging Systems
RGB Distribution Amplifiers
Features
♦Low Supply Current: 1.5mA per Amplifier
♦Fast Enable/Disable Times: 120ns/35ns
♦Very Low Switching Transient: 45mVp-p
♦High Speed
200MHz -3dB Small-Signal Bandwidth
(MAX4188, AVCL ≥+2)
250MHz -3dB Small-Signal Bandwidth
(MAX4189, AVCL ≥+1)
185MHz -3dB Small-Signal Bandwidth
(MAX4190, AVCL ≥+2)
♦High Slew Rate
350V/µs (MAX4188, AVCL ≥ +2)
175V/µs (MAX4189, AVCL ≥ +1)
♦Excellent Video Specifications
85MHz -0.1dB Gain Flatness (MAX4190)
30MHz -0.1dB Gain Flatness (MAX4189)
Differential Gain/Phase Errors
0.03%/0.05° (MAX4188)
♦Low-Power Disable Mode
Inputs Isolated, Outputs Placed in High-Z
Supply Current Reduced to 450µA per Amplifier
♦Fast Settling Time of 22ns to 0.1%
♦Low Distortion
70dB SFDR (fc= 5MHz, VO= 2Vp-p, MAX4188)
♦Available in Space-Saving Packages
16-Pin QSOP (MAX4188/MAX4189)
8-Pin µMAX (MAX4190)
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
________________________________________________________________ Maxim Integrated Products 1
19-1369; Rev 1; 2/07
Ordering Information continued at end of data sheet.
Ordering Information
Pin Configuration appears at end of data sheet.
8-pin µMAX/SO1AV≥+2V/VMAX4190
14-pin SO,
16-pin QSOP
3AV≥+1V/VMAX4189
14-pin SO,
16-pin QSOP
3AV≥+2V/VMAX4188
PIN-PACKAGE
AMPLIFIERS
PER PKG.
OPTIMIZED
FOR:
PART
Selector Guide
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX4188ESD+
-40°C to +85°C
14 SO
S14-1
MAX4188EEE+
-40°C to +85°C
16 QSOP
E16-1
+Denotes lead-free package.
EVALUATION KIT
AVAILABLE
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS—Dual Supplies
(VCC = +5V; VEE = -5V; IN+ = 0V; DISABLE_ ≥3.2V; MAX4188: AV= +2V/V, RF = RG= 910Ωfor RL= 1kΩand RF= RG= 560Ωfor
RL= 150Ω; MAX4189: AV= +1V/V, RF= 1600Ωfor RL= 1kΩand RF= 1100Ωfor RL= 150Ω; MAX4190: AV= +2V/V, RF= RG=
1300Ωfor RL= 1kΩ, RF= RG= 680Ωfor RL= 150Ω; TA= TMIN to TMAX, unless otherwise noted. Typical values are specified at
TA= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (VCC to VEE)................................................+12V
IN_+, IN_-, DISABLE_ Voltage .........(VEE - 0.3V) to (VCC + 0.3V)
Differential Input Voltage (IN_+ to IN_-)..............................±1.5V
Maximum Current into IN_+ or IN_-..................................±10mA
Output Short-Circuit Current Duration........................Continuous
Continuous Power Dissipation (TA= +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
8-Pin µMAX (derate 4.1mW/°C above +70°C) ............330mW
14-Pin SO (derate 8.3mW/°C above +70°C) ..................667mW
16-Pin QSOP (derate 8.3mW/°C above +70°C)...............667mW
Operating Temperature Range............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
SYMBOL CONDITIONS UNITS
Operating Supply Voltage Inferred from PSRR tests V
Input Offset Voltage VOS VCM = 0V (Note 1) ±1 ±6 mV
Input Offset Voltage Tempco TCVOS µV/°C
Input Offset Voltage Matching mV
Input Bias Current (Positive Input) IB+ µA
Input Bias Current (Negative Input) IB- µA
Input Resistance (Positive Input) RIN+ -3.1V ≤VCM ≤3.1V, ⎥VIN+ - VIN-⎥≤1V kΩ
Input Resistance (Negative Input) RIN- Ω
Input Capacitance (Positive Input) CIN pF
Common-Mode Rejection Ratio CMRR -3.1V ≤VCM ≤3.1V dB
Open-Loop Transresistance TR
-3.1V ≤VOUT ≤3.1V, RL= 1kΩ
-2.8V ≤VOUT ≤2.8V, RL= 150ΩMΩ
Output-Voltage Swing VSW
RL= 1kΩV
RL= 150Ω
Output Current IOUT RL= 30ΩmA
Output Short-Circuit Current ISC mA
Output Resistance ROUT Ω
Disabled Output Leakage Current IOUT(OFF) DISABLE_ ≤VIL, VOUT ≤±3.5V (Note 2) µA
Disabled Output Capacitance COUT(OFF) DISABLE_ ≤VIL, VOUT ≤±3.5V pF
DISABLE Low Threshold VIL (Note 3) V
DISABLE High Threshold VIH (Note 3) V
MIN TYP MAX
±2.25 ±5.5
±10
VCC - 3
±1
±1 ±10
±2 ±12
100 350
300
2.5
56 68
VCC - 1.8
17
0.3 2
±3.5 ±4.0
±3.0 ±3.3
±20 ±55
±60
0.2
±0.8 ±5
5
PARAMETER
DISABLE Input Current IIN VEE ≤DISABLE_ ≤VCC 0.1 2 µA
Power-Supply Rejection Ratio (VCC)PSRR+ VEE = -5V, VCC = 4.5V to 5.5V 60 75 dB
Quiescent Supply Current (per Amplifier) ISRL= open 1.5 1.85 mA
Disabled Supply Current (per Amplifier) IS(OFF) DISABLE_ ≤VIL, RL= open 0.45 0.65 mA
Power-Supply Rejection Ratio (VEE)PSRR- VCC = 5V, VEE = -4.5V to -5.5V 60 73 dB
Input Voltage Range VCM Guaranteed by CMRR test ±3.1 ±3.4 V
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS—Single Supply
(VCC = +5V; VEE = 0V; IN+ = 2.5V; DISABLE_ ≥3.2V; RLto VCC / 2; MAX4188: AV= +2V/V, RF= RG= 1.1kΩfor RL = 1kΩand RF=
RG = 620Ωfor RL= 150Ω; MAX4189: AV= +1V/V, RF= 1500Ωfor RL= 1kΩand RF= 1600Ωfor RL= 150Ω; MAX4190: AV= +2V/V,
RF= RG= 1300Ωfor RL= 1kΩ, RF= RG= 680Ωfor RL= 150Ω; TA= TMIN to TMAX, unless otherwise noted. Typical values are speci-
fied at TA= +25°C.)
RL= 30Ω
RL= open
RL= 150Ω
RL= 1kΩ
mA
1.45V ≤VOUT ≤3.55V, RL= 150Ω
1.5 1.85
1.3V ≤VOUT ≤3.7V, RL= 1kΩ
1.5V ≤VCM ≤3.5V
1.6V ≤VCM ≤3.4V, ⎥VIN+ -V
IN-⎥≤1V
VCM = 2.5V (Note 1)
Guaranteed by CMRR test
IS
Quiescent Supply Current
(per Amplifier)
DISABLE_ ≤VIL, RL= open
Inferred from PSRR tests
CONDITIONS
Ω0.2ROUT
Output Resistance
mA±50ISC
Output Short-Circuit Current
mA±16 ±28IOUT
Output Current
V
1.4 to 1.15 to
3.6 3.85
VSW
mA
1.2 to 0.9 to
3.8 4.1
Output-Voltage Swing
MΩ
0.2 1.0
TR
Open-Loop Transresistance 1.0 6.5
0.45 0.65
dB48 65CMRRCommon-Mode Rejection Ratio
pF2.5CIN
Input Capacitance
(Positive Input)
Ω300RIN-
Input Resistance
(Negative Input)
kΩ100 350RIN+
Input Resistance
(Positive Input)
µA±2 ±12IB-
Input Bias Current
(Negative Input)
µA±1 ±10IB+
Input Bias Current
(Positive Input)
IS(OFF)
Disabled Supply Current
(per Amplifier)
mV±1Input Offset Voltage Matching
µV/°C±10TCVOS
Input Offset Voltage Tempco
mV±1.5 ±6.0VOS
Input Offset Voltage
V
1.6 to 1.3 to
3.4 3.7
VCM
Input Voltage Range
V4.5 5.5Operating Supply Voltage
UNITSMIN TYP MAXSYMBOLPARAMETER
DISABLE_ ≤VIL, 1.2V ≤VOUT ≤3.8V
DISABLE_ ≤VIL, 1.2V ≤VOUT ≤3.8V (Note 2)
pF5COUT(OFF)
Disabled Output Capacitance
µA0.8 ±5IOUT(OFF)
Disabled Output Leakage
Current
(Note 3)
(Note 3)
VVCC - 1.8VIH
DISABLE High Threshold
VVCC - 3VIL
DISABLE Low Threshold
VCC = 4.5V to 5.5V
0V ≤DISABLE_ ≤VCC
dB60 75PSRR+
Power-Supply Rejection
Ratio (VCC)
µA0.1 2IIN
DISABLE Input Current
V/µs
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
4 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX4188)
(VCC = +5V, VEE = -5V, VIN = 0V, DISABLE_ ≥3V, AV= +2V/V, RF= RG= 910Ωfor RL = 1kΩor RF= RG= 560Ωfor RL = 150Ω;
TA = +25°C, unless otherwise noted.)
Positive input
Negative input
NTSC
RL= 1kΩ
f = 10kHz
NTSC
RL= 150Ω
pA/√Hz
RL= 1kΩ
fC = 5MHz,
VOUT = 2VP-P
fC = 5MHz,
VOUT = 2VP-P
RL= 1kΩ
VOUT = 4V step
in
fC = 5MHz,
VOUT = 2VP-P
VOUT = 2VP-P
RL= 150Ω
RL= 1kΩ
RL= 150Ω
RL= 1kΩ
RL= 150Ω
VOUT = 4V step
CONDITIONS
RL= 1kΩ
RL= 150Ω
%
0.04
DGDifferential Gain Error 0.03
RL= 150Ω
RL= 1kΩ
degrees
0.32
DPDifferential Phase Error 0.05
RL= 150Ω
RL= 1kΩ
dBc
-56
Third Harmonic Distortion -73
RL= 150Ω
RL= 1kΩ
dBc
-66
Second Harmonic Distortion -70
RL= 150Ω
Input Noise-Current Density
dB
56
SFDRSpurious-Free Dynamic Range 70
ns
12
Rise/Fall Time
0.25
4
MHz
160
BW-3dB
200
Small-Signal -3dB Bandwidth
10
ns22tS
Settling Time to 0.1%
350
MHz
100
BWLS
Large-Signal -3dB Bandwidth
dB
0.1
Peaking
60 MHz
80
BW0.1dB
Bandwidth for 0.1dB Flatness
100
UNITSMIN TYP MAXSYMBOLPARAMETER
f = 10MHz
f = 10kHz
Ω4ZOUT
Output Impedance
nV/√Hz
2en
Input Noise-Voltage Density
f = 10MHz, input referred
f = 10MHz, input referred
dB-65All Hostile Off-Isolation
dB-55Crosstalk
Delay from DISABLE to 90% of VOUT,
VIN = 0.5V ns120tON
Amplifier Enable Time
MHz100Gain Matching to 0.1dB
Positive transient
Delay from DISABLE to 10% of VOUT,
VIN = 0.5V
30
ns35tOFF
Amplifier Disable Time
Negative transient mV
15
Disable/Enable Switching
Transient
5
Rise time
Fall time
VOUT = 4V step,
RL= 150ΩV/µs
280
SRSlew Rate Positive slew
Negative slew
V/µs
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
_______________________________________________________________________________________ 5
Positive input
Negative input
NTSC
RL= 1kΩ
f = 10kHz
NTSC
RL= 150Ω
pA/√Hz
RL= 1kΩ
fC = 5MHz,
VOUT = 2VP-P
5
fC = 5MHz,
VOUT = 2VP-P
RL= 1kΩ
VOUT = 4V step
in
fC = 5MHz,
VOUT = 2VP-P
VOUT = 2VP-P
RL= 150Ω
RL= 1kΩ
RL= 150Ω
RL= 1kΩ
RL= 150Ω
VOUT = 4V step
CONDITIONS
RL= 1kΩ
RL= 150Ω
%
0.18
DGDifferential Gain Error 0.07
RL= 150Ω
RL= 1kΩ
degrees
0.66
DPDifferential Phase Error 0.02
RL= 150Ω
RL= 1kΩ
dBc
-51
Third Harmonic Distortion -70
RL= 150Ω
RL= 1kΩ
dBc
-63
Second Harmonic Distortion -65
RL= 150Ω
Input Noise-Current Density
dB
51
SFDRSpurious-Free Dynamic Range 65
ns
22
Rise/Fall Time
1.4
4
MHz
210
BW-3dB
250
Small-Signal -3dB Bandwidth
20
ns28tS
Settling Time to 0.1%
175
MHz
55
BWLS
Large-Signal -3dB Bandwidth
dB
0.15
Peaking
7MHz
30
BW0.1dB
Bandwidth for 0.1dB Flatness
60
UNITSMIN TYP MAXSYMBOLPARAMETER
f = 10MHz
f = 10kHz
Ω4ZOUT
Output Impedance
nV/√Hz
2en
Input Noise-Voltage Density
f = 10MHz, input referred
f = 10MHz, input referred
dB-55All Hostile Off-Isolation
dB-57Crosstalk
Delay from DISABLE to 90% of VOUT,
VIN = 0.5V ns120tON
Amplifier Enable Time
MHz24Gain Matching to 0.1dB
Positive transient
Delay from DISABLE to 10% of VOUT,
VIN = 0.5V
70
ns40tOFF
Amplifier Disable Time
Negative transient mV
110
Disable/Enable Switching
Transient
AC ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX4189)
(VCC = +5V, VEE = -5V, VIN = 0V, DISABLE_ ≥3V, AV= +1V/V, RF= 1600Ωfor RL= 1kΩand RF= 1100Ωfor RL= 150Ω; TA=
+25°C, unless otherwise noted.)
VOUT = 4V step,
RL= 150ΩV/µs
150
SRSlew Rate Positive slew
Negative slew
Rise time
Fall time
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
6 _______________________________________________________________________________________
RL= 1kΩ
f = 10kHz
NTSC
RL= 150Ω
nV/√Hz
RL= 1kΩ
fC = 5MHz,
VO= 2VP-P
fC = 5MHz,
VO= 2VP-P
RL= 1kΩ
VO= 2V step
en
fC = 5MHz,
VO= 2VP-P
Rise time
VO= 2VP-P
RL= 150Ω
RL= 1kΩ
RL= 150Ω
VO= 4V step,
RL= 150Ω
CONDITIONS
VO= 4V step,
RL= 150ΩV/µs
270
SRSlew Rate Positive slew
RL= 1kΩ
RL= 150Ω
Negative slew
RL= 150Ω
RL= 1kΩ
degrees
0.07
DGDifferential Gain Error
Fall time
0.03
RL= 150Ω
RL= 1kΩ
dBc
-61
Third Harmonic Distortion -73
RL= 150Ω
dBc
-55
Second Harmonic Distortion -65
Input Noise-Voltage Density
dB
55
Spurious-Free Dynamic Range 61
ns
12
tR
Rise/Fall Time
0.1
2
MHz
150
BWSS
185
Small-Signal -3dB Bandwidth
10
ns22tS
Settling Time to 0.1%
340
MHz
95
BWLS
Large-Signal -3dB Bandwidth
dB
0.1
Peaking
85 MHz
75
BWLS
Bandwidth for 0.1dB Flatness
95
UNITSMIN TYP MAXSYMBOLPARAMETER
f = 10MHz
f = 10kHz
Ω4ZOUT
Output Impedance
4
Input Noise-Current Density
f = 10MHz, input referred dB-60All Hostile Off-Isolation
Positive transient 30
ns120tON
Turn-On Time from DISABLE
Negative transient mV
15
BWLS
Disable/Enable Switching
Transient
RL= 1kΩ
RL= 150kΩ
tF
NTSC degrees
0.45
DPDifferential Phase Error 0.06RL= 1kΩ
RL= 150Ω
pA/√Hz
5
Positive input
Negative input
AC & DYNAMIC PERFORMANCE—Dual Supplies (MAX4190)
(VCC = +5V, VEE = -5V, VIN = 0V, AV= +2V/V; RF= RG= 1300Ωfor RL= 1kΩand RF= RG= 680Ωfor RL= 150Ω,
TA= +25°C, unless otherwise noted.)
ns35tOFF
Turn-Off Time from DISABLE
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
_______________________________________________________________________________________ 7
VOUT = 2V step
AC ELECTRICAL CHARACTERISTICS—Single Supply (MAX4188)
(VCC = +5V, VEE = 0V, VIN = 2.5V, DISABLE_ ≥3V, RLto VCC / 2, AV= +2V/V, RF= RG= 1.1kΩfor RL= 1kΩto VCC / 2 and RF= RG
= 620Ωfor RL= 150Ω; TA= +25°C, unless otherwise noted.)
Positive input
Negative input
NTSC
RL= 1kΩ
f = 10kHz
NTSC
RL= 150Ω
pA/√Hz
RL= 1kΩ
fC = 5MHz,
VOUT = 2VP-P
5
fC = 5MHz,
VOUT = 2VP-P
RL= 1kΩ
VOUT = 2V step
in
fC = 5MHz,
VOUT = 2VP-P
VOUT = 2VP-P
RL= 150Ω
RL= 1kΩ
RL= 150Ω
RL= 1kΩ
RL= 150Ω
VOUT = 2V step
CONDITIONS
RL= 1kΩ
RL= 150Ω
%
0.05
DGDifferential Gain Error 0.02
RL= 150Ω
RL= 1kΩ
degrees
0.34
DPDifferential Phase Error 0.06
RL= 150Ω
RL= 1kΩ
dBc
-56
Third Harmonic Distortion -66
RL= 150Ω
RL= 1kΩ
dBc
-59
Second Harmonic Distortion -76
RL= 150Ω
Input Noise-Current Density
dB
56
SFDRSpurious-Free Dynamic Range 66
ns
9
Rise/Fall Time
0.1
4
MHz
145
BW-3dB
185
Small-Signal -3dB Bandwidth
8
ns20tS
Settling Time to 0.1%
V/µs300
MHz
80
BWLS
Large-Signal -3dB Bandwidth
dB
0.1
Peaking
110 MHz
65
BW0.1dB
Bandwidth for 0.1dB Flatness
80
UNITSMIN TYP MAXSYMBOLPARAMETER
f = 10MHz
f = 10kHz
Ω4ZOUT
Output Impedance
nV/√Hz
2en
Input Noise-Voltage Density
f = 10MHz, input referred
f = 10MHz, input referred
dB-65All Hostile Off Isolation
dB-55Crosstalk
Delay from DISABLE to 90% of VOUT,
VIN = 3V ns120tON
Amplifier Enable Time
MHz40Gain Matching to 0.1dB
Positive transient
Delay from DISABLE to 10% of VOUT,
VIN = 3V
30
ns35tOFF
Amplifier Disable Time
Negative transient mV
15
Disable/Enable Switching
Transient
Rise time
Fall time
VOUT = 2V step,
RL= 150ΩV/µs230
SRSlew Rate Positive slew
Negative slew
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
8 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS—Single Supply (MAX4189)
(VCC = +5V, VEE = 0V, VIN = 2.5V, DISABLE_ ≥3V, RL to VCC / 2, AV= +1V/V, RF= 1500Ωfor RL= 1kΩand RF= 1600Ωfor
RL= 150Ω; TA= +25°C, unless otherwise noted.)
Positive input
Negative input
NTSC
RL= 1kΩ
f = 10kHz
NTSC
RL= 150Ω
pA/√Hz
RL= 1kΩ
fC = 5MHz,
VOUT = 2VP-P
5
fC = 5MHz,
VOUT = 2VP-P
RL= 1kΩ
in
fC = 5MHz,
VOUT = 2VP-P
VOUT = 2VP-P
RL= 150Ω
RL= 1kΩ
RL= 150Ω
RL= 1kΩ
RL= 150Ω
VOUT = 2V step
CONDITIONS
RL= 1kΩ
RL= 150Ω
%
0.17
DGDifferential Gain Error 0.06
RL= 150Ω
RL= 1kΩ
degrees
0.66
DPDifferential Phase Error 0.04
RL= 150Ω
RL= 1kΩ
dBc
-47
Third Harmonic Distortion -57
RL= 150Ω
RL= 1kΩ
dBc
-54
Second Harmonic Distortion -58
RL= 150Ω
Input Noise-Current Density
dB
47
SFDRSpurious-Free Dynamic Range 57
ns
15
Rise/Fall Time
1.4
4
MHz
190
BW-3dB
230
Small-Signal -3dB Bandwidth
12
ns25tS
Settling Time to 0.1%
160
MHz
45
BWLS
Large-Signal -3dB Bandwidth
dB
0.15
Peaking
7MHz
40
BW0.1dB
Bandwidth for 0.1dB Flatness
50
UNITSMIN TYP MAXSYMBOLPARAMETER
f = 10MHz
f = 10kHz
Ω4ZOUT
Output Impedance
nV/√Hz
2en
Input Noise-Voltage Density
f = 10MHz, input referred
f = 10MHz, input referred
dB-55All Hostile Off-Isolation
dB-57Crosstalk
Delay from DISABLE to 90% of VOUT,
VIN = 3V ns120tON
Amplifier Enable Time
MHz25Gain Matching to 0.1dB
Positive transient
Delay from DISABLE to 10% of VOUT,
VIN = 3V
70
ns40tOFF
Amplifier Disable Time
Negative transient mV
110
Disable/Enable Switching
Transient
Note 1: Input Offset Voltage does not include the effect of IBIAS flowing through RF/RG.
Note 2: Does not include current through external feedback network.
Note 3: Over operating supply-voltage range.
Positive slew
VOUT = 2V step
VOUT = 2V step,
RL= 150ΩNegative slew V/µs
135
SRSlew Rate
Rise time
Fall time
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
_______________________________________________________________________________________ 9
RL= 1kΩ
NTSC
RL= 150Ω
RL= 1kΩ
fC = 5MHz,
VO= 2VP-P
fC = 5MHz,
VO= 2VP-P
RL= 1kΩ
Rise time
fC = 5MHz,
VO= 2VP-P
Fall time
VO= 2VP-P
RL= 150Ω
RL= 1kΩ
RL= 150Ω
RL= 1kΩ
RL= 150Ω
VO= 2V step,
RL= 150Ω
CONDITIONS
Positive slew
VO= 2V step
VO= 2V step,
RL= 150ΩNegative slew V/µs
220
RL= 1kΩ
RL= 150Ω
SR
RL= 150Ω
RL= 1kΩ
%
0.08
DGDifferential Gain Error
Slew Rate
0.02
RL= 150Ω
RL= 1kΩ
dBc
-60
Third Harmonic Distortion -68
RL= 150Ω
dBc
-55
Second Harmonic Distortion -59
dB
55
Spurious-Free Dynamic Range 59
ns
9
tR
tF
Rise/Fall Time
0.1
MHz
135
BW-3dB
165
Small-Signal -3dB Bandwidth
8
ns20tS
Settling Time to 0.1%
290
MHz
75
BWLS
Large-Signal -3dB Bandwidth
dB
0.1
Peaking
70 MHz
65
BW0.1dB
Bandwidth for 0.1dB Flatness
75
UNITSMIN TYP MAXSYMBOLPARAMETER
f = 10MHz Ω4ZOUT
Output Impedance
f = 10kHzInput Noise-Voltage Density
f = 10MHz, input referred, RL= 150ΩdB-60All Hostile Off-Isolation
ns120tON
Turn-On Time from DISABLE
Positive transient 30
Negative transient mV
15
BWLS
Disable/Enable Switching
Transient
nV/√Hz
NTSC degrees
0.43
DPDifferential Phase Error 0.07RL= 1kΩ
RL= 150Ω
AC & DYNAMIC PERFORMANCE—Single Supply (MAX4190)
(VCC = +5V, VEE = 0V, VIN = 0V, AV= +2V/V; RF= RG= 1500Ωfor RL= 1kΩand RF= RG= 750Ωfor RL= 150Ω,
TA= +25°C, unless otherwise noted)
pA/√Hz
5Negative input
Positive input
f = 10kHz 4
in
Input Noise-Current Density
2
ns35tOFF
Turn-Off Time from DISABLE
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
10 ______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
9
0
1 100010010
MAX4188 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
3
1
7
5
10
4
2
8
6
MAX4188toc01
FREQUENCY (MHz)
GAIN (dB)
RF = RG = 390Ω
RL = 100Ω
RF = RG = 910kΩ
RL = 1kΩ
RF = RG = 560Ω
RL = 150Ω
VIN = 20mVP-P
AV = +2V/V
9
0
1 100010010
MAX4188 SMALL-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
3
1
7
5
10
4
2
8
6
MAX4188toc02
FREQUENCY (MHz)
GAIN (dB)
RF = RG = 620Ω
RL = 150Ω
RF = RG = 1.1kΩ
RL = 1kΩ
RF = RG = 430Ω
RL = 100Ω
VEE = 0V
VIN = 20mVP-P
AV = +2V/V
0.3
-0.6
1 100010010
MAX4188 GAIN FLATNESS
vs. FREQUENCY (DUAL SUPPLIES)
-0.3
-0.5
0.1
-0.1
0.4
-0.2
-0.4
0.2
0
MAX4188toc03
FREQUENCY (MHz)
GAIN (dB)
VIN = 20mVP-P
AV = +2V/V
RF = RG = 910Ω
RL = 1kΩ
RF = RG = 620Ω
RL = 150Ω
RF = RG = 390Ω
RL = 100Ω
3
-6
1 100010010
MAX4189 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
-3
-5
1
-1
4
-2
-4
2
0
MAX4188toc04
FREQUENCY (MHz)
GAIN (dB)
VIN = 20mVP-P
AV = +1V/V
RF = 1.1kΩ
RL = 150Ω
RF = 1.6kΩ
RL = 1kΩ
RF = 680Ω
RL = 100Ω
3
-6
1 100010010
MAX4189 SMALL-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-3
-5
1
-1
4
-2
-4
2
0
MAX4188toc05
FREQUENCY (MHz)
GAIN (dB)
VEE = 0
VIN = 20mVP-P
AV = +1V/V
RF = 1.5kΩ
RL = 1kΩ
RF = 1.6kΩ
RL = 150Ω
RF = 910Ω
RL = 100Ω
0.1
-0.8
1 100010010
MAX4189 GAIN FLATNESS
vs. FREQUENCY (DUAL SUPPLIES)
-0.5
-0.7
-0.1
-0.3
0.2
-0.4
-0.6
0
-0.2
MAX4188toc06
FREQUENCY (MHz)
GAIN (dB)
VIN = 20mVP-P
AV = +1V/V
RF = 1.1kΩ
RL = 150Ω
RF = 680Ω
RL = 100Ω
9
0
1 100010010
MAX4188 LARGE-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
3
1
7
5
10
4
2
8
6
MAX4188toc08
FREQUENCY (MHz)
GAIN (dB)
RF = RG = 620Ω
RL = 150Ω
RF = RG = 1.1kΩ
RL = 1kΩ
VEE = 0
VIN = 1VP-P
AV = +2V/V
2.0
-2.5
1 100010010
MAX4188 SMALL-SIGNAL GAIN
MATCHING vs. FREQUENCY
-1.0
-2.0
1.0
0
2.5
-0.5
-1.5
1.5
0.5
MAX4188toc09
FREQUENCY (MHz)
GAIN MATCHING (dB)
CH2-CH3
VIN = 20mVP-P
RF = RG = 750Ω
RL = 1kΩ
AV = +2V/V
CH1-CH3
CH1-CH2
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
______________________________________________________________________________________ 11
3
-6
1 100010010
MAX4189 LARGE-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
-3
-5
1
-1
4
-2
-4
2
0
MAX4188toc10
FREQUENCY (MHz)
GAIN (dB)
VIN = 2VP-P
AV = 1V/V
RF = 1.6kΩ
RL = 1kΩ
RF = 1.1kΩ
RL = 150Ω
3
-6
1 100010010
MAX4189 LARGE-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-3
-5
1
-1
4
-2
-4
2
0
MAX4188toc11
FREQUENCY (MHz)
GAIN (dB)
VEE = 0
VIN = 2VP-P
AV = +1V/V
RF = 1.6kΩ
RL = 150Ω
RF = 1.5kΩ
RL = 1kΩ
2.0
-2.5
1 100010010
MAX4189 SMALL-SIGNAL GAIN
MATCHING vs. FREQUENCY
-1.0
-2.0
1.0
0
2.5
-0.5
-1.5
1.5
0.5
MAX4188toc12
FREQUENCY (MHz)
GAIN (dB)
VIN = 2VP-P
RF = 1.6kΩ
RL = 1kΩ
AV = +1V/V
CH_1–CH_3
CH_1–CH_2
CH_3–CH_2
-10
-100
0.1 100101
MAX4188 HARMONIC DISTORTION
vs. FREQUENCY (DUAL SUPPLIES)
-70
-90
-30
-50
0
-60
-80
-20
-40
MAX4188toc13
FREQUENCY (MHz)
DISTORTION (dBc)
VOUT = 2VP-P
2ND (RL = 150Ω)
3RD (RL = 150Ω)
3RD (RL = 1kΩ)
2ND (RL = 1kΩ)
-10
-100
0.1 100101
MAX4189 HARMONIC DISTORTION
vs. FREQUENCY (DUAL SUPPLIES)
-70
-90
-30
-50
0
-60
-80
-20
-40
MAX4188toc16
FREQUENCY (MHz)
DISTORTION (dBc)
VOUT = 2VP-P
2ND (RL = 150Ω)
3RD (RL = 150Ω)
2ND (RL = 1kΩ)
3RD (RL = 1kΩ)
-10
-100
0.1 100101
MAX4188 HARMONIC DISTORTION
vs. FREQUENCY (SINGLE SUPPLY)
-70
-90
-30
-50
0
-60
-80
-20
-40
MAX4188toc14
FREQUENCY (MHz)
DISTORTION (dBc)
VOUT = 2VP-P
2ND (RL = 150Ω)
3RD (RL = 150Ω)
2ND (RL = 1kΩ)
3RD (RL = 1kΩ)
-10
-80
1 100010010
MAX4188 CROSSTALK vs.
FREQUENCY (DUAL SUPPLIES)
-70
-30
-50
0
-60
-20
-40
MAX4188toc15
FREQUENCY (MHz)
CROSSTALK (dBc)
VOUT = 2VP-P
RL = 150Ω
-10
-100
0.1 100101
MAX4189 HARMONIC DISTORTION
vs. FREQUENCY (SINGLE SUPPLY)
-70
-90
-30
-50
0
-60
-80
-20
-40
MAX4188toc17
FREQUENCY (MHz)
DISTORTION (dBc)
VOUT = 2VP-P
2ND (RL = 150Ω)
3RD (RL = 150Ω)
2ND (RL = 1kΩ)
3RD (RL = 1kΩ)
-10
-80
1 100010010
MAX4189 CROSSTALK vs.
FREQUENCY (DUAL SUPPLIES)
-70
-30
-50
0
-60
-20
-40
MAX4188toc18
FREQUENCY (MHz)
CROSSTALK (dBc)
VOUT = 2VP-P
RL = 150Ω
____________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
12 ______________________________________________________________________________________
____________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
3.4
3.2
2.8
2.4
2.0
1.6
1.4
100 1M1k 10k 100k 10M 100M 1G
INPUT VOLTAGE-NOISE
DENSITY vs. FREQUENCY
1.8
MAX4180 TOC19
FREQUENCY (Hz)
2.2
2.6
3.0
VOLTAGE-NOISE DENSITY (nV/√Hz)
4
12
8
20
16
24
28
100 100k 1M1k 10k 10M 100M 1G
TOTAL VOLTAGE-NOISE DENSITY
vs. FREQUENCY (INPUT REFERRED)
MAX4188toc20
FREQUENCY (Hz)
TOTAL VOLTAGE-NOISE DENSITY (nV/√Hz)
VOUT
VIN
910kΩ
910kΩ
MAX4188
12
0
100
50
150
250
200
300
350
0.02 0.1
-3dB BANDWIDTH
vs. INPUT AMPLITUDE
MAX4188toc21
INPUT AMPLITUDE (Vp-p)
-3dB BANDWIDTH (MHz)
MAX4188
MAX4189
DUAL SUPPLIES:
RL = 1kΩ,
AV = +2V/V, RF = RG = 910Ω
FOR MAX4188;
AV = +1V/V, RF = 1.6kΩ
FOR MAX4189
-10
-100
0.1 1000100101
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
-70
-90
-30
-50
0
-60
-80
-20
-40
MAX4188toc22
FREQUENCY (MHz)
PSRR (dB)
VCC (MAX4188)
VCC (MAX4189)
VEE (MAX4189)
VEE (MAX4188)
0
0.4
0.2
1.0
0.8
0.6
1.2
1.4
1.8
1.6
2.0
-40 -20 0 20 40 60 80
INPUT OFFSET VOLTAGE (VOS)
vs. TEMPERATURE
MAX4188toc25
TEMPERATURE (°C)
VOS (mV)
1k
0.1
0.1 1 10 100 1000
OUTPUT IMPEDANCE
vs. FREQUENCY (DUAL SUPPLIES)
1
MAX4188-23
FREQUENCY (MHz)
OUTPUT IMPEDANCE (Ω)
10
100
MAX4188
MAX4189
RL = 1kΩ,
AV = +2V/V, RF = RG = 910Ω
FOR MAX4188;
AV = +1 V/V, RF = 1.6kΩ
FOR MAX4189
1.2
1.3
1.4
1.5
1.6
-40 20-20 0 40 60 80
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
MAX4188toc24
TEMPERATURE (°C)
SUPPLY CURRENT PER AMPLIFIER (mA)
VCC = 5V; VEE = 0
VCC = 5V; VEE = -5V
0
1
2
3
4
5
-40 20-20 0 40 60 80
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX4188toc26
TEMPERATURE (°C)
INPUT BIAS CURRENT (µA)
IB - (POSITIVE INPUT)
IB - (NEGATIVE INPUT)
0.2
0.3
0.4
0.5
-40 20-20 0 40 60 80
DISABLED SUPPLY CURRENT PER
AMPLIFIER vs. TEMPERATURE
MAX4188toc27
TEMPERATURE (°C)
DISABLED SUPPLY CURRENT PER AMPLIFIER (mA)
VCC = ±2.5V
VCC = ±5V
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
______________________________________________________________________________________ 13
0.8
1.0
1.2
1.4
1.6
1.8
-40 20-20 0 40 60 80
OUTPUT VOLTAGE SWING
vs. TEMPERATURE
MAX4188toc28
TEMPERATURE (°C)
(VCC-VOH) AND (VOL-VEE) (mV)
VOL - VEE; RL = 150Ω
VCC - VOH; RL = 150Ω
VOL - VEE; RL = 1kΩ
VCC - VOH; RL = 1kΩ
0V
OUT
DISABLE
2V
0V
4V
MAX4188
ENABLE/DISABLE RESPONSE
MAX4188toc29
50ns/div
AV = +2V/V, RF = RG = 910Ω, RL = 1kΩ, VIN = 1V
0V
2V/div
AV = +1V/V, RL = 1kΩ, RF = 1.6kΩ, VEE = 0
VCC
VOUT
0V
10V
MAX4189
POWER-ON RESPONSE
MAX4188toc30
200ns/div
-50mV
OUT
IN
+50mV
-25mV
+25mV
MAX4188
SMALL-SIGNAL PULSE RESPONSE
MAX4188toc31
10ns/div
AV = +2V/V, RF = RG = 910Ω, RL = 1kΩ
-50mV
OUT
IN
+50mV
-25mV
+25mV
MAX4188
SMALL-SIGNAL PULSE RESPONSE
(WITH CLOAD)
MAX4188toc32
10ns/div
AV = +2V/V, RF = RG = 910Ω, RL = 1kΩ, CL = 47pF
-2V
OUT
IN
+2V
-1V
+1V
MAX4188
LARGE-SIGNAL PULSE RESPONSE
MAX4188toc33
10ns/div
AV = +2V/V, RF = RG = 910Ω, RL = 1kΩ
____________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
14 ______________________________________________________________________________________
____________________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
20mV/div
0V
DISABLE
OUT
0V
3V
MAX4188
SWITCHING TRANSIENT
MAX4188toc37
100ns/div
AV = +2V/V, RF = 910Ω, RL = 1kΩ, VIN = 0
100mV/div
DISABLE
OUT
0V
3V
MAX4189
SWITCHING TRANSIENT
MAX4188toc38
100ns/div
AV = +1V/V, RF = 1.6kΩ, RL = 1kΩ, VIN = 0
-95
1 100010010
OFF-CHANNEL FEEDTHROUGH
vs. FREQUENCY (DUAL SUPPLIES)
-75
-35
-55
-25
-65
-85
-45
MAX4188toc39
FREQUENCY (MHz)
OFF-CHANNEL FEEDTHROUGH (dB)
RL = 150Ω
-50mV
OUT
IN
+50mV
-50mV
+50mV
MAX4189
SMALL-SIGNAL PULSE RESPONSE
MAX4188toc34
10ns/div
AV = +1V/V, RF = 1.1kΩ, RL = 150Ω
-50mV
OUT
IN
+50mV
-50mV
+50mV
MAX4189
SMALL-SIGNAL PULSE RESPONSE
(WITH CLOAD)
MAX4188toc35
10ns/div
AV = +1V/V, RF = 1.6kΩ, RL = 1kΩ, CL = 47pF
-2V
OUT
IN
+2V
-2V
+2V
MAX4189
LARGE-SIGNAL PULSE RESPONSE
MAX4188toc36
10ns/div
AV = +1V/V, RF = 1.1kΩ, RL = 150Ω
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
______________________________________________________________________________________ 15
Pin Descriptions
8
6
3
2
Disable Control Input. Amplifier is enabled when DISABLE ≥(VCC - 2V)
and disabled when DISABLE ≤(VCC - 3V).
—
—
—
—
Amplifier Output
4
—
Amplifier Noninverting Input
—
—
—
MAX4190
—
DISABLE
OUT
IN+
IN-
OUT2
Amplifier Inverting Input
1, 5
—
Amplifier 2 Output
IN2-
14
—
IN2+
VEE
Amplifier 2 Inverting Input
IN3+
13
Amplifier 2 Noninverting Input
—
12
IN3-
—
OUT3
Negative Power Supply. Connect VEE to -5V or to ground for single-supply
operation.
N.C.
OUT1
IN1-
7
11
Amplifier 3 Noninverting Input
IN1+
10
—
VCC
Amplifier 3 Inverting Input
DISABLE3
9
Amplifier 3 Output
PIN
NAME
—DISABLE2
8
—DISABLE1
—
—
—
—
No Connection. Not internally connected.
16
—
Amplifier 1 Output
15
7
14
13
Amplifier 1 Inverting Input
12
6
Amplifier 1 Noninverting Input
11
5
MAX4188/MAX4189
10
8, 9
7
Positive Power Supply. Connect VCC to +5V.
6
4
Disable Control Input for Amplifier 3. Amplifier 3 is enabled when
DISABLE3 ≥(VCC - 2V) and disabled when DISABLE3 ≤(VCC - 3V).
5
3
4
3
Disable Control Input for Amplifier 2. Amplifier 2 is enabled when
DISABLE2 ≥(VCC - 2V) and disabled when DISABLE2 ≤(VCC - 3V).
2
Disable Control Input for Amplifier 1. Amplifier 1 is enabled when
DISABLE1 ≥(VCC - 2V) and disabled when DISABLE1 ≤(VCC - 3V).
2
1
FUNCTION
1
SO/µMAXSO QSOP
Detailed Description
The MAX4188/MAX4189/MAX4190 are very low-power,
current-feedback amplifiers featuring bandwidths up to
250MHz, 0.1dB gain flatness to 80MHz, and low differ-
ential gain (0.03%) and phase (0.05°) errors. These
amplifiers achieve very high bandwidth-to-power ratios
while maintaining low distortion, wide signal swing, and
excellent load-driving capabilities. They are optimized
for ±5V supplies but are also fully specified for single
+5V operation. Consuming only 1.5mA per amplifier,
these devices have ±55mA output current drive capabil-
ity and achieve low distortion even while driving 150Ω
loads.
Wide bandwidth, low power, low differential phase/gain
error, and excellent gain flatness make the MAX4188
family ideal for use in portable video equipment such
as video cameras, video switchers, and other battery-
powered equipment. Their two-stage design provides
higher gain and lower distortion than conventional sin-
gle-stage, current-feedback amplifiers. This feature,
combined with a fast settling time, makes these devices
suitable for buffering high-speed analog-to-digital con-
verters.
The MAX4188/MAX4189/MAX4190 have a high-speed,
low-power disable mode that is activated by driving the
amplifiers’ DISABLE input low. In the disable mode, the
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
16 ______________________________________________________________________________________
amplifiers achieve very high isolation from input to output
(65dB at 10MHz), and the outputs are placed into a high-
impedance state. These amplifiers achieve low switch-
ing-transient glitches (<45mVP-P) when switching
between enable and disable modes. Fast enable/disable
times (120ns/35ns), along with high off-isolation and low
switching transients, allow these devices to be used as
high-performance, high-speed multiplexers. This is
achieved by connecting the outputs of multiple amplifiers
together and controlling the DISABLE inputs to enable
one amplifier and disable all others. The disabled ampli-
fiers present a very light load (1µA leakage current and
3.5pF capacitance) to the active amplifier’s output. The
feedback network impedance of all the disabled ampli-
fiers must still be considered when calculating the total
load on the active amplifier output. Figure 1 shows an
application circuit using the MAX4188 as a 3:1 video mul-
tiplexer.
The DISABLE_ logic threshold is typically VCC - 2.5V,
independent of VEE. For a single +5V supply or dual
±5V supplies, the disable inputs are CMOS-logic com-
patible. The amplifiers default to the enabled mode if
the DISABLE pin is left unconnected. If the DISABLE
pin is left floating, take proper care to ensure that no
high-frequency signals are coupled to this pin, as this
may cause false triggering.
Applications Information
Theory of Operation
The MAX4188/MAX4189/MAX4190 are current-feedback
amplifiers, and their open-loop transfer function is
expressed as a transimpedance, ∆VOUT/∆IIN, or TZ. The
frequency behavior of the open-loop transimpedance is
similar to the open-loop gain of a voltage-mode feedback
amplifier. That is, it has a large DC value and decreases
at approximately 6dB per octave.
Analyzing the follower with gain, as shown in Figure 2,
yields the following transfer function:
VOUT / VIN = G x [(TZ(S) / TZ(s) + G x (RIN + RF)]
where G = AVCL = 1 + (RF/ RG), and RIN = 1/gM≅
300Ω.
At low gains, G x RIN < RF. Therefore, the closed-loop
bandwidth is essentially independent of closed-loop
gain. Similarly TZ> RFat low frequencies, so that:
V
V
OUT
IN
( / )==+GRR
FG
1
VIN
RG
RIN
TZ
RF
+1
+1
VOUT
MAX4188
MAX4189
MAX4190
Figure 2. Current-Feedback Amplifier
AMP1
6
7
5
560Ω
75Ω
VIN1
560Ω
1.0µF
1.0µF 0.1µF
411
+5V -5V
0.1µF
87Ω
AMP2
13
14
12
9
10
DISABLE2
DISABLE3
DISABLE1
560Ω
75Ω
VIN2
560Ω
VOUT
87Ω
75Ω
75Ω
CABLE
8
123
560Ω
75Ω
VIN3
560Ω
87Ω
MAX4188
AMP3
Figure 1. High-Speed 3:1 Video Multiplexer
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
______________________________________________________________________________________ 17
VOUT
RG
RS
VOUT = -(RF / RG) (VIN)
VIN
RF
RO
RT
MAX4188
MAX4189
MAX4190
Figure 3a. Inverting Gain Configuration
VOUT
RG
RS
VOUT = [1+ (RF / RG)] VIN
VIN
RF
RO
RT
MAX4188
MAX4189
MAX4190
Figure 3b. Noninverting Gain Configuration
Layout and Power-Supply Bypassing
As with all wideband amplifiers, a carefully laid out PCB
and adequate power-supply bypassing are essential to
realizing the optimum AC performance of MAX4188/
MAX4189/MAX4190. The PC board should have at
least two layers. Signal and power should be on one
layer. A large low-impedance ground plane, as free of
voids as possible, should be the other layer. With multi-
layer boards, locate the ground plane on a layer that
incorporates no signal or power traces.
Do not use wire-wrap boards or breadboards and
sockets. Wire-wrap boards are too inductive.
Breadboards and sockets are too capacitive. Surface-
mount components have lower parasitic inductance
and capacitance, and are therefore preferable to
through-hole components. Keep lines as short as pos-
sible to minimize parasitic inductance, and avoid 90°
turns. Round all corners. Terminate all unused amplifier
inputs to ground with a 100Ωor 150Ωresistor.
The MAX4188/MAX4189/MAX4190 achieve a high
degree of off-isolation (65dB at 10MHz) and low
crosstalk (-55dB at 10MHz). The input and output sig-
nal traces must be kept from overlapping to achieve
high off-isolation. Coupling between the signal traces of
different channels will degrade crosstalk. The signal
traces of each channel should be kept from overlap-
ping with the signal traces of the other channels.
Adequate bypass capacitance at each supply is very
important to optimize the high-frequency performance of
these amplifiers. Inadequate bypassing will also
degrade crosstalk rejection, especially with heavier
loads. Use a 1µF capacitor in parallel with a 0.01µF to
0.1µF capacitor between each supply pin and ground to
achieve optimum performance. The bypass capacitors
should be located as close to the device as possible. A
10µF low-ESR tantalum capacitor may be required to
produce the best settling time and lowest distortion
when large transient currents must be delivered to a
load.
Choosing Feedback and Gain Resistors
The optimum value of the external-feedback (RF) and
gain-setting (RG) resistors used with the MAX4188/
MAX4189/MAX4190 depends on the closed-loop gain
and the application circuit’s load. Table 1 lists the opti-
mum resistor values for some specific gain configura-
tions. One-percent resistor values are preferred to
maintain consistency over a wide range of production
lots. Figures 3a and 3b show the standard inverting
and noninverting configurations. Note that the nonin-
verting circuit gain (Figure 3b) is 1 plus the magnitude
of the inverting closed-loop gain. Otherwise, the two
circuits are identical.
COMPONENT/
BW
COMPONENT/
BW
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
18 ______________________________________________________________________________________
MAX4188/MAX4189/MAX4190
DC and Noise Errors
Several major error sources must be considered in any
op amp. These apply equally to the MAX4188/
MAX4189/MAX4190. Offset-error terms are given by the
equation below. Voltage and current-noise errors are
root-square summed and are therefore computed sep-
arately. In Figure 4, the total output offset voltage is
determined by the following factors:
• The input offset voltage (VOS) times the closed-loop
gain (1 = RF / RG).
• The positive input bias current (IB+) times the
source resistor (RS) (usually 50Ωor 75Ω), plus the
negative input bias current (IB-) times the parallel
combination of RGand RF. In current-feedback
amplifiers, the input bias currents at the IN+ and IN-
terminals do not track each other and may have
opposite polarity, so there is no benefit to matching
the resistance at both inputs.
The equation for the total DC error at the output is:
V IR I R R V 1
R
R
OUT B S B F G OS F
G
|| =
()
+
()
()
+
[]
+
⎛
⎝
⎜⎞
⎠
⎟
+−
Table 1a. MAX4188 Recommended Component Values
Table 1b. MAX4189 Recommended Component Values
Table 1c. MAX4190 Recommended Component Values
AV= +10
V/V
470
51
30
RL=
1kΩ
AV= +5
V/V
470
120
70
RL=
1kΩ
AV= +2V/V AV = +10
(V/V)
DUAL SUPPLIES
620 430
AV= +2V/V
430
130
RL=
100Ω
620
145
RL=
150Ω
470
120
70
470
AV = +5
(V/V)
1.1k
1.1k
185
RL=
1kΩ
RL=
1kΩ
51
30
RL=
1kΩ
390
390
145
RL=
100Ω
910RF(Ω)
910
200
560
COMPONENT/
BW
RG(Ω)
-3dB BW (MHz)
RL=
1kΩ
560
160
RL=
150Ω
AV= +10
V/V
470
51
30
RL=
1kΩ
AV= +5
V/V
470
120
70
RL=
1kΩ
AV= +2V/V AV = +10
(V/V)
DUAL SUPPLIES
750 510
AV= +1V/V
510
125
RL=
100Ω
750
135
RL=
150Ω
470
120
70
470
AV = +5
(V/V)
1.5k
1.5k
165
RL=
1kΩ
RL=
1kΩ
51
30
RL=
1kΩ
510
510
135
RL=
100Ω
1.3kRF(Ω)
1.3k
185
680
COMPONENT/
BW
RG(Ω)
-3dB BW (MHz)
RL=
1kΩ
680
180
RL=
150Ω
SINGLE SUPPLY
SINGLE SUPPLY
RG
IB-
IB+VOUT
RF
RSMAX4188
MAX4189
MAX4190
Figure 4. Output Offset Voltage
RL= 150Ω
210
1.1k
RL= 1kΩRL= 100Ω
185
680
AV= +1V/V
-3dB BW (MHz)
RG(Ω)
RL= 1kΩ
230
1.5k
DUAL SUPPLIES
RL= 150Ω
190
1.6k
RL= 100Ω
165
910
SINGLE SUPPLY
AV= +1V/V
COMPONENT/
BW
250
1.6k
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
______________________________________________________________________________________ 19
VIDEO
IN
VIDEO
OUT
75Ω75Ω CABLE
75Ω CABLE
RF
560Ω
RG
560Ω
75Ω
75Ω
+5V
-5V
0.1µF
MAX4188
0.1µF
Figure 5. Video Line Driver Application
RGRF
RS
RL
CL
VIN
MAX4188
MAX4189
MAX4190
Figure 6a. Using an Isolation Resistor (RS) for High Capacitive
Loads
The total output-referred noise voltage is:
The MAX4188/MAX4189/MAX4190 have a very low,
2nV/√Hz noise voltage. The current noise at the positive
input (in+) is 4pA/√Hz, and the current noise at the
inverting input is 5pA/√Hz.
An example of the DC error calculations, using the
MAX4188 typical data and typical operating circuit
where RF= RG= 560kΩ(RF || RG=280Ω), and
RS= 37.5Ω, gives the following:
Calculating the total output noise in a similar manner
yields:
With a 200MHz system bandwidth, this calculates to
68µVRMS (approximately 408µVP-P, choosing the six-
sigma value).
Video Line Driver
The MAX4188/MAX4189/MAX4190 are well suited to
drive coaxial transmission lines when the cable is termi-
nated at both ends (Figure 5). Cable frequency
response can cause variations in the signal’s flatness.
See Table 1 for optimum RFand RGvalues.
Driving Capacitive Loads
The MAX4188/MAX4189/MAX4190 are optimized for
AC performance. Reactive loads decrease phase mar-
gin and may produce excessive ringing and oscillation.
Unlike most high-speed amplifiers, the MAX4188/
MAX4189/MAX4190 are tolerant of capacitive loads up
to 50pF. Capacitive loads greater than 50pF may
cause ringing and oscillation. Figure 6a shows a circuit
that eliminates this problem. Placing the small (usually
15Ωto 33Ω) isolation resistor, RS, before the reactive
load prevents ringing and oscillation. At higher capaci-
tive loads, the interaction of the load capacitance and
isolation resistor controls AC performance. Figures 6b
and 6c show the MAX4188 and MAX4189 frequency
response with a 100pF capacitive load. Note that in
each case, gain peaking is substantially reduced when
the 20Ωresistor is used to isolate the capacitive load
from the amplifier output.
e
xx
xx x
eHz
n OUT
n OUT
()
()
.
./
=+
()
⎛
⎝⎞
⎠+
⎛
⎝⎞
⎠+⎛
⎝⎞
⎠
=
−
−−
11
410 375
510 280 210
48
12 2
12 292
nV
Vxx x
x
x
V
OUT
OUT
=
⎛
⎝⎞
⎠+⎛
⎝⎞
⎠
+
⎡
⎣
⎢
⎢
⎢
⎤
⎦
⎥
⎥
⎥
+
()
=
−−
−
1 10 37 5 2 10 280
15 10
11
41
66
3
.
.
.mV
eR
Rx
iR iR R e
n OUT F
G
nS nF G n
()
||
=+
⎛
⎝
⎜⎞
⎠
⎟
()
[]
+
()
[]
+
()
+−
1
22
2
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
20 ______________________________________________________________________________________
Ordering Information (continued)
Pin Configurations
MAX4188/4189
TRANSISTOR COUNT: 336
MAX4190
TRANSISTOR COUNT: 112
SUBSTRATE CONNECTED TO VEE
Chip Information
1
2
3
4
8
7
6
5
DISABLE
VCC
OUT
N.C.VEE
IN+
IN-
N.C.
MAX4190
SO/µMAX
14
13
12
11
10
9
8
1
2
3
4
5
6
7
OUT2
IN2-
IN2+
VEE
VCC
DISABLE3
DISABLE2
DISABLE1
TOP VIEW
MAX4188
MAX4189
IN3+
IN3-
OUT3OUT1
IN1-
IN1+
SO
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
DISABLE1 OUT2
IN2-
IN2+
VEE
IN3+
IN3-
OUT3
N.C.
MAX4188
MAX4189
QSOP
DISABLE2
DISABLE3
IN1-
VCC
IN1+
OUT1
N.C.
5
4
3
-5
1 10 100 1000
-2
-3
-4
2
1
0
-1
FREQUENCY (MHz)
GAIN (dB)
MAX4189
AV = +1V/V
RF = 1.6k
RL = 1k || 100pF
VIN = 20mVP-P
RS = 0Ω
RS = 20Ω
RS = 33Ω
Figure 6c. Normalized Frequency Response with 100pF
Capacitive Load
Figure 6b. Normalized Frequency Response with 100pF
Capacitive Load
12
10
8
-10
1 10 100 1000
-2
-4
-8
6
4
2
0
FREQUENCY (MHz)
GAIN (dB)
MAX4188/MAX4190
AV = +2V/V
RF = RG = 910Ω
RL = 1k || 100pF
VIN = 20mVP-P RS = 0Ω
RS = 20Ω
RS = 33Ω
PART TEMP RANGE PIN-
PACKAGE
PKG
CODE
MAX4189ESD+ -40°C to +85°C 14 SO S14-1
MAX4189EEE+ -40°C to +85°C 16 QSOP E16-1
MAX4190ESA+ -40°C to +85°C 8 SO S8-2
MAX4190EUA+T -40°C to +85°C 8 µMAX-8 U8-1
+Denotes lead-free package.
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
______________________________________________________________________________________ 21
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
SOICN .EPS
PACKAGE OUTLINE, .150" SOIC
1
1
21-0041 B
REV.DOCUMENT CONTROL NO.APPROVAL
PROPRIETARY INFORMATION
TITLE:
TOP VIEW
FRONT VIEW
MAX
0.010
0.069
0.019
0.157
0.010
INCHES
0.150
0.007
E
C
DIM
0.014
0.004
B
A1
MIN
0.053A
0.19
3.80 4.00
0.25
MILLIMETERS
0.10
0.35
1.35
MIN
0.49
0.25
MAX
1.75
0.050
0.016L0.40 1.27
0.3940.386D
D
MINDIM
D
INCHES
MAX
9.80 10.00
MILLIMETERS
MIN MAX
16 AC
0.337 0.344 AB8.758.55 14
0.189 0.197 AA5.004.80 8
N MS012
N
SIDE VIEW
H 0.2440.228 5.80 6.20
e 0.050 BSC 1.27 BSC
C
HE
eBA1
A
D
0∞-8∞
L
1
VARIATIONS:
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
22 ______________________________________________________________________________________
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
QSOP.EPS
F
1
1
21-0055
PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23
© 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
MAX4188/MAX4189/MAX4190
Single/Triple, Low-Glitch, 250MHz, Current-
Feedback Amplifiers with High-Speed Disable
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23
© 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Revision History
Pages changed at Rev 1: 1–12, 15–17, 19–23
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
8LUMAXD.EPS
PACKAGE OUTLINE, 8L uMAX/uSOP
1
1
21-0036 J
REV.DOCUMENT CONTROL NO.APPROVAL
PROPRIETARY INFORMATION
TITLE:
MAX
0.043
0.006
0.014
0.120
0.120
0.198
0.026
0.007
0.037
0.0207 BSC
0.0256 BSC
A2 A1
c
eb
A
L
FRONT VIEW SIDE VIEW
E H
0.6±0.1
0.6±0.1
Ø0.50±0.1
1
TOP VIEW
D
8
A2 0.030
BOTTOM VIEW
16°
S
b
L
H
E
D
e
c
0°
0.010
0.116
0.116
0.188
0.016
0.005
8
4X S
INCHES
-
A1
A
MIN
0.002
0.950.75
0.5250 BSC
0.25 0.36
2.95 3.05
2.95 3.05
4.78
0.41
0.65 BSC
5.03
0.66
6°0°
0.13 0.18
MAX
MIN
MILLIMETERS
- 1.10
0.05 0.15
α
α
DIM