127:
+
-
LMH6552
V+
V-
22 pF
VREF
127:
-
+
100:
100:
274:
274:
ADC14DS105
14-Bit
105
MSPS
620 nH
620 nH
49.9:
68.1:
68.1:
0.1 PF
50:
Single-Ended
AC-coupled
Source
LMH6552
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SNOSAX9H –APRIL 2007–REVISED MARCH 2013
1.5 GHz Fully Differential Amplifier
Check for Samples: LMH6552
1FEATURES DESCRIPTION
The LMH6552 is a high performance fully differential
2• 1.5 GHz −3 dB Small Signal amplifier designed to provide the exceptional signal
Bandwidth @ AV= 1 fidelity and wide large-signal bandwidth necessary for
• 1.25 GHz −3 dB Large Signal driving 8 to 14 bit high speed data acquisition
Bandwidth @ AV= 1 systems. Using TI's proprietary differential current
mode input stage architecture, the LMH6552 allows
• 800 MHz Bandwidth @ AV= 4 operation at gains greater than unity without
• 450 MHz 0.1 dB Flatness sacrificing response flatness, bandwidth, harmonic
• 3800 V/µs Slew Rate distortion, or output noise performance.
• 10 ns Settling Time to 0.1% With external gain set resistors and integrated
–−90 dB THD @ 20 MHz common mode feedback, the LMH6552 can be
configured as either a differential input to differential
–−74 dB THD @ 70 MHz output or single ended input to differential output gain
• 20 ns Enable/Shutdown Pin block. The LMH6552 can be AC or DC coupled at the
• 5 to 12V Operation input which makes it suitable for a wide range of
applications including communication systems and
APPLICATIONS high speed oscilloscope front ends. The performance
of the LMH6552 driving an ADC14DS105 is 86 dBc
• Differential ADC Driver SFDR and 74 dBc SNR up to 40 MHz.
• Video Over Twisted Pair The LMH6552 is available in an 8-pin SOIC package
• Differential Line Driver as well as a space saving, thermally enhanced 8-Pin
• Single End to Differential Converter WSON package for higher performance.
• High Speed Differential Signaling
• IF/RF Amplifier
• Level Shift Amplifier
• SAW Filter Buffer/Driver
Typical Application
Figure 1. Single-Ended Input Differential Output ADC Driver
1Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Copyright © 2007–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
LMH6552
SNOSAX9H –APRIL 2007–REVISED MARCH 2013
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings (1)
ESD Tolerance (2)
Human Body Model 2000V
Machine Model 200V
Supply Voltage 13.2V
Common Mode Input Voltage ±VS
Maximum Input Current (pins 1, 2, 7, 8) 30 mA
Maximum Output Current (pins 4, 5) (3)
Maximum Junction Temperature 150°C
Soldering Information
For soldering specifications see SNOA549C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications, see the Electrical
Characteristics tables.
(2) Human Body Model, applicable std. MIL-STD-883, Method 30157. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of
JEDEC). Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC).
(3) The maximum output current (IOUT) is determined by device power dissipation limitations. See POWER DISSIPATION of Application
Information for more details.
Operating Ratings (1)
Operating Temperature Range (2) −40°C to +85°C
Storage Temperature Range −65°C to +150°C
Total Supply Voltage 4.5V to 12V
Package Thermal Resistance (θJA)
8-Pin SOIC 150°C/W
8-Pin WSON 58°C/W
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications, see the Electrical
Characteristics tables.
(2) The maximum power dissipation is a function of TJ(MAX),θJA. The maximum allowable power dissipation at any ambient temperature is
PD= (TJ(MAX)– TA) / θJA. All numbers apply for packages soldered directly onto a PC Board.
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SNOSAX9H –APRIL 2007–REVISED MARCH 2013
±5V Electrical Characteristics (1)
Unless otherwise specified, all limits are ensured for TA= 25°C, V+= +5V, V−=−5V, AV= 1, VCM = 0V, RF= RG= 357Ω, RL=
500Ω, for single ended in, differential out. Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min (2) Typ (3) Max (2) Units
AC Performance (Differential)
SSBW Small Signal −3 dB Bandwidth (2) VOUT = 0.2 VPP, AV= 1, RL= 1 kΩ1500
VOUT = 0.2 VPP, AV= 1 1000
VOUT = 0.2 VPP, AV= 2 930 MHz
VOUT = 0.2 VPP, AV= 4 810
VOUT = 0.2 VPP, AV= 8 590
LSBW Large Signal −3 dB Bandwidth VOUT = 2 VPP, AV= 1, RL= 1 kΩ1250
VOUT = 2 VPP, AV= 1 950
VOUT = 2 VPP, AV= 2 820 MHz
VOUT = 2 VPP, AV= 4 740
VOUT = 2 VPP, AV= 8 590
0.1 dB Bandwidth VOUT = 0.2 VPP, AV= 1 450 MHz
Slew Rate 4V Step, AV= 1 3800 V/μs
Rise/Fall Time, 10%-90% 2V Step 600 ps
0.1% Settling Time 2V Step 10 ns
Overdrive Recovery Time VIN = 1.8V to 0V Step, AV= 5 V/V 6 ns
Distortion and Noise Response
HD2 2nd Harmonic Distortion VOUT = 2 VPP, f = 20 MHz, RL= 800Ω −92 dBc
VOUT = 2 VPP, f = 70 MHz, RL= 800Ω −74
HD3 3rd Harmonic Distortion VOUT = 2 VPP, f = 20 MHz, RL= 800Ω −93 dBc
VOUT = 2 VPP, f = 70 MHz, RL= 800Ω −84
IMD3 Two-Tone Intermodulation f ≥70 MHz, Third Order Products, VOUT =−87 dBc
2 VPP Composite
Input Noise Voltage f ≥1 MHz 1.1 nV/√Hz
Input Noise Current f ≥1 MHz 19.5 pA/√Hz
Noise Figure (See Figure 48) 50ΩSystem, AV= 9, 10 MHz 10.3 dB
Input Characteristics
IBI Input Bias Current (4) 60 110 µA
IBoffset Input Bias Current Differential VCM = 0V, VID = 0V, IBoffset = (IB−- IB+)/2 2.5 18 µA
(3)
CMRR Common Mode Rejection Ratio (3) DC, VCM = 0V, VID = 0V 80 dBc
RIN Input Resistance Differential 15 Ω
CIN Input Capacitance Differential 0.5 pF
CMVR Input Common Mode Voltage Range CMRR > 38 dB ±3.5 ±3.8 V
Output Performance
Output Voltage Swing (3) Differential Output 14.8 15.4 VPP
IOUT Linear Output Current (3) VOUT = 0V ±70 ±80 mA
(1) Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very
limited self-heating of the device such that TJ= TA. No specification of parametric performance is indicated in the electrical tables under
conditions of internal self-heating where TJ> TA. See Application Information for information on temperature de-rating of this device."
Min/Max ratings are based on product characterization and simulation. Individual parameters are tested as noted.
(2) Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical
Quality Control (SQC) methods.
(3) Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped
production material.
(4) IBI is referred to a differential output offset voltage by the following relationship: VOD(offset) = IBI*2RF
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±5V Electrical Characteristics (1) (continued)
Unless otherwise specified, all limits are ensured for TA= 25°C, V+= +5V, V−=−5V, AV= 1, VCM = 0V, RF= RG= 357Ω, RL=
500Ω, for single ended in, differential out. Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min (2) Typ (3) Max (2) Units
ISC Short Circuit Current One Output Shorted to Ground VIN = 2V ±141 mA
Single Ended (5)
Output Balance Error ΔVOUT Common Mode /ΔVOUT −60 dB
Differential, ΔVOD = 1V, f < 1 MHz
Miscellaneous Performance
ZTOpen Loop Transimpedance Differential 108 dBΩ
PSRR Power Supply Rejection Ratio DC, (V+- |V-|) = ±1V 80 dB
ISSupply Current (3) RL=∞19 22.5 25 mA
28
Enable Voltage Threshold 3.0 V
Disable Voltage Threshold 2.0 V
Enable/Disable time 15 ns
ISD Disable Shutdown Current 500 600 μA
Output Common Mode Control Circuit
Common Mode Small Signal VIN+= VIN−= 0 400 MHz
Bandwidth
Slew Rate VIN+= VIN−= 0 607 V/μs
VOSCM Input Offset Voltage Common Mode, VID = 0, VCM = 0 1.5 ±16.5 mV
Input Bias Current (6) −3.2 ±8 µA
Voltage Range ±3.7 ±3.8 V
CMRR Measure VOD, VID = 0V 80 dB
Input Resistance 200 kΩ
Gain ΔVO,CM/ΔVCM 0.995 1.0 1.012 V/V
(5) Short circuit current should be limited in duration to no more than 10 seconds. See POWER DISSIPATION of Application Information for
more details.
(6) Negative input current implies current flowing out of the device.
±2.5V Electrical Characteristics (1)
Unless otherwise specified, all limits are ensured for TA= 25°C, V+= +2.5V, V−=−2.5V, AV= 1, VCM = 0V, RF= RG= 357Ω,
RL= 500Ω, for single ended in, differential out. Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min (2) Typ (3) Max (2) Units
SSBW Small Signal −3 dB Bandwidth (2) VOUT = 0.2 VPP, AV= 1, RL= 1 kΩ1100
VOUT = 0.2 VPP, AV= 1 800
VOUT = 0.2 VPP, AV= 2 740 MHz
VOUT = 0.2 VPP, AV= 4 660
VOUT = 0.2 VPP, AV= 8 498
LSBW Large Signal −3 dB Bandwidth VOUT = 2 VPP, AV= 1, RL= 1 kΩ820
VOUT = 2 VPP, AV= 1 690
VOUT = 2 VPP, AV= 2 620 MHz
VOUT = 2 VPP, AV= 4 589
VOUT = 2 VPP, AV= 8 480
(1) Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very
limited self-heating of the device such that TJ= TA. No specification of parametric performance is indicated in the electrical tables under
conditions of internal self-heating where TJ> TA. See Application Information for information on temperature de-rating of this device."
Min/Max ratings are based on product characterization and simulation. Individual parameters are tested as noted.
(2) Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical
Quality Control (SQC) methods.
(3) Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped
production material.
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SNOSAX9H –APRIL 2007–REVISED MARCH 2013
±2.5V Electrical Characteristics (1) (continued)
Unless otherwise specified, all limits are ensured for TA= 25°C, V+= +2.5V, V−=−2.5V, AV= 1, VCM = 0V, RF= RG= 357Ω,
RL= 500Ω, for single ended in, differential out. Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min (2) Typ (3) Max (2) Units
0.1 dB Bandwidth VOUT = 0.2 VPP, AV= 1 300 MHz
Slew Rate 2V Step, AV= 1 2100 V/μs
Rise/Fall Time, 10% to 90% 2V Step 700 ps
0.1% Settling Time 2V Step 10 ns
Overdrive Recovery Time VIN = 0.7 V to 0 V Step, AV= 5 V/V 6 ns
Distortion and Noise Response
HD2 2nd Harmonic Distortion VOUT = 2 VPP, f = 20 MHz, RL= 800Ω-82 dBc
VOUT = 2 VPP, f = 70 MHz, RL= 800Ω-65
HD3 3rd Harmonic Distortion VOUT = 2 VPP, f = 20 MHz, RL= 800Ω-79 dBc
VOUT = 2 VPP, f = 70 MHz, RL= 800Ω-67
IMD3 Two-Tone Intermodulation f ≥70 MHz, Third Order Products, −77 dBc
VOUT = 2 VPP Composite
Input Noise Voltage f ≥1 MHz 1.1 nV/√Hz
Input Noise Current f ≥1 MHz 19.5 pA/√Hz
Noise Figure (See Figure 48) 50ΩSystem, AV= 9, 10 MHz 10.2 dB
Input Characteristics
IBI Input Bias Current (4) 54 90 µA
IBoffset Input Bias Current Differential VCM = 0V, VID = 0V, IBoffset = (IB−- IB+)/2 2.3 18 μA
(3)
CMRR Common-Mode Rejection Ratio (3) DC, VCM = 0V, VID = 0V 75 dBc
RIN Input Resistance Differential 15 Ω
CIN Input Capacitance Differential 0.5 pF
CMVR Input Common Mode Range CMRR > 38 dB ±1.0 ±1.3 V
Output Performance
Output Voltage Swing (5) Differential Output 5.6 6.0 VPP
IOUT Linear Output Current (5) VOUT = 0V ±55 ±65 mA
ISC Short Circuit Current One Output Shorted to Ground, VIN = 2V ±131 mA
Single Ended (6)
Output Balance Error ΔVOUT Common Mode /ΔVOUT 60 dB
Differential, ΔVOD = 1V, f < 1 MHz
Miscellaneous Performance
ZT Open Loop Transimpedance Differential 107 dBΩ
PSRR Power Supply Rejection Ratio DC, ΔVS= ±1V 80 dB
ISSupply Current (5) RL=∞17 20.4 24 mA
27
Enable Voltage Threshold 3.0 V
Disable Voltage Threshold 2.0 V
Enable/Disable Time 15 ns
ISD Disable Shutdown Current 500 600 µA
Output Common Mode Control Circuit
Common Mode Small Signal VIN+= VIN−= 0 310 MHz
Bandwidth
Slew Rate VIN+= VIN−= 0 430 V/μs
(4) IBI is referred to a differential output offset voltage by the following relationship: VOD(offset) = IBI*2RF
(5) Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped
production material.
(6) Short circuit current should be limited in duration to no more than 10 seconds. See POWER DISSIPATION of Application Information for
more details.
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1
4
3
5
8
7
6
V+
+ OUT
VCM
- IN
- OUT
+ IN
EN
V-
2
DAP
-
4
+OUT 5-OUT
36
V+ V-
EN
27
VCM +
18
-IN +IN
LMH6552
SNOSAX9H –APRIL 2007–REVISED MARCH 2013
www.ti.com
±2.5V Electrical Characteristics (1) (continued)
Unless otherwise specified, all limits are ensured for TA= 25°C, V+= +2.5V, V−=−2.5V, AV= 1, VCM = 0V, RF= RG= 357Ω,
RL= 500Ω, for single ended in, differential out. Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min (2) Typ (3) Max (2) Units
VOSCM Input Offset Voltage Common Mode, VID = 0, VCM = 0 1.65 ±15 mV
Input Bias Current (7) −2.9 µA
Voltage Range ±1.19 ±1.25 V
CMRR Measure VOD, VID = 0V 80 dB
Input Resistance 200 kΩ
Gain ΔVO,CM/ΔVCM 0.995 1.0 1.012 V/V
(7) Negative input current implies current flowing out of the device.
CONNECTION DIAGRAM
Figure 2. 8-Pin SOIC-Top View
See Package Number D0008A
Figure 3. 8-Pin WSON-Top View
See Package Number NGS0008C
PIN DESCRIPTIONS
Pin No. Pin Name Description
1 -IN Negative Input
2 VCM Output Common Mode Control
3 V+ Positive Supply
4 +OUT Positive Output
5 -OUT Negative Output
6 V- Negative Supply
7 EN Enable
8 +IN Positive Input
DAP DAP Die Attach Pad (See THERMAL PERFORMANCE for more information)
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-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
1 10 100 10000
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
1000
V+ = +2.5V
V- = -2.5V
RL = 500:
RF = 357:
VOD = 0.2 VPP
AV = 1 V/V
V+ = +5V
V- = -5V
RL = 500:
RF = 357:
DIFFERENTIAL INPUT
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
1 10 100 10000
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
1000
V+ = +2.5V
V- = -2.5V
RL = 1 k:
RF = 301:
VOD = 0.2 VPP
AV = 1 V/V
V+ = +5V
V- = -5V
RL = 1 k:
RF = 301:
DIFFERENTIAL INPUT
110 100 1000 10000
FREQUENCY (MHz)
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
NORMALIZED GAIN (dB)
V+ = +5V
V- = -5V
AV = 2 V/V
DIFFERENTIAL INPUT
VOD = 4 VPP
VOD = 2 VPP
VOD = 0.5 VPP
110 100 1000 10000
FREQUENCY (MHz)
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
NORMALIZED GAIN (dB)
V+ = +5V
V- = -5V
AV = 2 V/V
SINGLE-ENDED INPUT
VOD = 4 VPP
VOD = 2 VPP
VOD = 0.5 VPP
110 100 1000 10000
FREQUENCY (MHz)
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
NORMALIZED GAIN (dB)
AV = 8, RF = 400:
VOUT = 0.2 VPP
SINGLE-ENDED INPUT
AV = 4
AV = 2
AV = 1
110 100 1000 10000
FREQUENCY (MHz)
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
NORMALIZED GAIN (dB)
VOUT = 0.2 VPP
DIFFERENTIAL INPUT
AV = 8
AV = 4
AV = 1
AV = 2
LMH6552
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SNOSAX9H –APRIL 2007–REVISED MARCH 2013
Typical Performance Characteristics V+= +5V, V−=−5V
(TA= 25°C, RF= RG= 357Ω, RL= 500Ω, AV= 1, for single ended in, differential out, unless specified).
Frequency Response Frequency Response
vs. vs.
Gain Gain
Figure 4. Figure 5.
Frequency Response Frequency Response
vs. vs.
VOUT VOUT
Figure 6. Figure 7.
Frequency Response Frequency Response
vs. vs.
Supply Voltage Supply Voltage
Figure 8. Figure 9.
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0 5 10 15 20 25 30 35 40 45 50
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
VOD (V)
TIME (ns)
V+ = +2.5V
V- = -2.5V
RL = 500:
RF = 357:
110000
FREQUENCY (MHz)
-9
-5
-2
2
NORMALIZED GAIN (dB)
1000
100
10
0
-4
-8
1
-1
-3
-6
-7
V+ = +5V
V- = -5V
AV = 1 V/V
VOUT = 2 VPP
RL = 1 k:
RF = 301:
RF = 357:
RF = 400:
DIFFERENTIAL INPUT
110 100 1000 10000
FREQUENCY (MHz)
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
NORMALIZED GAIN (dB)
RL = 200:
RL = 1 k:
RL = 500:
RL = 800:
V+ = +5V
V- = -5V
AV = 1 V/V
RF = 357:
VOUT = 0.2 VPP
SINGLE-ENDED INPUT
110 100 1000 10000
FREQUENCY (MHz)
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
NORMALIZED GAIN (dB)
RL = 200:
RL = 1 k:
RL = 500:
RL = 800:
V+ = +5V
V- = -5V
AV = 1 V/V
RF = 357:
VOUT = 2 VPP
SINGLE-ENDED INPUT
110 100 1000
FREQUENCY (MHz)
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
NORMALIZED GAIN (dB)
CL = 82 pF, RO = 16:
CL = 39 pF, RO = 21:
CL = 15 pF, RO = 24:
CL = 5.6 pF, RO = 23:
VOD = 200 mVPP
AV = 1
LOAD = (CL || 1 k:) IN
SERIES WITH 2 ROUTS
CAPACITIVE LOAD (pF)
110 100
0
10
20
30
SUGGESTED RO (:)
V+ = +5V
V- = -5V
LOAD = 1 k: || CAP LOAD
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Typical Performance Characteristics V+= +5V, V−=−5V (continued)
(TA= 25°C, RF= RG= 357Ω, RL= 500Ω, AV= 1, for single ended in, differential out, unless specified).
Frequency Response Suggested ROUT
vs. vs.
Capacitive Load Capacitive Load
Figure 10. Figure 11.
Frequency Response Frequency Response
vs. vs.
Resistive Load Resistive Load
Figure 12. Figure 13.
Frequency Response
vs.
RF1 VPP Pulse Response Single Ended Input
Figure 14. Figure 15.
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FREQUENCY (MHz)
DISTORTION (dBc)
-50
-55
-60
-65
-70
-75
-80
-85
-90
-95
-100
-1051 25 50 75 100 125 150 175 200 225 250
HD2
HD3
V+ = +5V
V- = -5V
RL = 800Ö
VOD = 2 VPP
VOCM = 0V
0 5 10 15 20 25 30 35 40 45 50
-80
-60
-40
-20
0
20
40
60
80
COMMON MODE VOUT (mV)
TIME (ns)
V+ = +5V
V- = -5V
RL = 500:
RL = 357:
VOD = 2 VPP
0 5 10 15 20 25 30 35 40 45 50
-1.5
-1
-0.5
0
0.5
1
1.5
VOD (V)
TIME (ns)
V+ = +5
V- = -5V
RL = 500:
RF = 357:
05 10 15 20 25 30 35 40 45 50
-2.5
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
2.5
VOD (V)
TIME (ns)
V+ = +5V
V- = -5V
RL = 500:
RF = 357:
LMH6552
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SNOSAX9H –APRIL 2007–REVISED MARCH 2013
Typical Performance Characteristics V+= +5V, V−=−5V (continued)
(TA= 25°C, RF= RG= 357Ω, RL= 500Ω, AV= 1, for single ended in, differential out, unless specified).
2 VPP Pulse Response Single Ended Input Large Signal Pulse Response
Figure 16. Figure 17.
Distortion
vs.
Output Common Mode Pulse Response Frequency Single Ended Input
Figure 18. Figure 19.
Distortion Distortion
vs. vs.
Supply Voltage Supply Voltage
Figure 20. Figure 21.
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120
0.01 11000
FREQUENCY (MHz)
40
70
MAGNITUDE, |Z| (dB :)
100
10
0.1
100
90
60
50
80
110
-180
-45
-90
-135
0
MAGNITUDE
PHASE
V+ = +5V
V- = -5V
PHASE (°)
120
0.01 11000
FREQUENCY (MHz)
40
70
MAGNITUDE, |Z| (dB :)
100
10
0.1
100
90
60
50
80
110
-180
-45
-90
-135
0
MAGNITUDE
PHASE
V+ = +2.5V
V- = -2.5V
PHASE (°)
00.5 1 1.5 2 2.5 3
VOCM (V)
-100
-90
-80
-70
-60
-50
-40
DISTORTION (dBc)
V+ = +5V
V- = -5V
RL = 800:
VOUT = 2 VPP
fc = 20 MHz
HD2
HD3
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Typical Performance Characteristics V+= +5V, V−=−5V (continued)
(TA= 25°C, RF= RG= 357Ω, RL= 500Ω, AV= 1, for single ended in, differential out, unless specified).
Distortion Distortion
vs. vs.
Output Common Mode Voltage Output Common Mode Voltage
Figure 22. Figure 23.
Maximum VOUT Minimum VOUT
vs. vs.
IOUT IOUT
Figure 24. Figure 25.
Open Loop Transimpedance Open Loop Transimpedance
Figure 26. Figure 27.
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0
40
100
PSRR (dBc DIFFERENTIAL)
80
60
20
90
70
50
30
10
11000
FREQUENCY (MHz)
100
10
0.1
+PSRR
-PSRR
V+ = +5V
V- = -5V
AV = 2 V/V
RL = 500:
VIN = 0V
0.1 1000
FREQUENCY (MHz)
0
-40
-70
-110
PSRR (dBc DIFFERENTIAL)
100
10
1
-90
-50
-10
-100
-80
-60
-30
-20
+PSRR
-PSRR
V+ = +2.5V
V- = -2.5V
AV = 2 V/V
RL = 500:
VIN = 0V
0 200 400 600 800 1000
-10
-8
-6
-4
-2
0
2
4
6
8
10
OUTPUT VOLTAGE (VOD)
TIME (ns)
V+ = +5V
V- = -5V
AV = 5 V/V
RF = 324:
RL = 200:-2
-1.6
-1.2
-0.8
-0.4
0
0.4
0.8
1.2
1.6
2
INPUT VOLTAGE (V)
INPUT
OUTPUT
0 200 400 600 800 1000
-4
-3
-2
-1
0
1
2
3
4
OUTPUT VOLTAGE (VOD)
TIME (ns)
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
INPUT VOLTAGE (V)
V+ = +2.5V
V- = -2.5V
AV = 5 V/V
RF = 324:
RL = 200:
INPUT
OUTPUT
0.01 1 100 1000
FREQUENCY (MHz)
0.0001
10
1000
|Z| (:)
10
0.1
100
0.001
0.1
1
0.01
V+ = +5V
V- = -5V
VIN = 0V
AV = 1 V/V
0.01 0.1 110 1000
FREQUENCY (MHz)
0.01
0.1
100
1000
|Z| (:)
100
1
10
V+ = +2.5V
V- = -2.5
VIN = 0V
AV = 1 V/V
LMH6552
www.ti.com
SNOSAX9H –APRIL 2007–REVISED MARCH 2013
Typical Performance Characteristics V+= +5V, V−=−5V (continued)
(TA= 25°C, RF= RG= 357Ω, RL= 500Ω, AV= 1, for single ended in, differential out, unless specified).
Closed Loop Output Impedance Closed Loop Output Impedance
Figure 28. Figure 29.
Overdrive Recovery Overdrive Recovery
Figure 30. Figure 31.
PSRR PSRR
Figure 32. Figure 33.
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Product Folder Links: LMH6552
0.0001 0.01 1 100
FREQUENCY (MHz)
100.1
0.001
VOLTAGE NOISE (nV/
Hz)
NOISE VOLTAGE
INVERTING CURRENT
NOISE CURRENT
NON-INVERTING CURRENT
NOISE CURRENT
6
0
4
5
3
2
1
210
0
140
175
105
70
35
CURRENT NOISE (pA/
Hz)
0 20 40 60 80 100 120 140 160 180 200
10
11
12
13
14
15
NOISE FIGURE (dB)
FREQUENCY (MHz)
V+ = +5V
V- = -5V
AV = 9 V/V
RF = 275:
50: SYSTEM
0 20 40 60 80 100 120 140 160 180 200
10
11
12
13
14
15
NOISE FIGURE (dB)
FREQUENCY (MHz)
V+ = +2.5V
V- = -2.5V
AV = 9 V/V
RF = 275:
50: SYSTEM
0.1 11000
FREQUENCY (MHz)
20
40
65
85
CMRR (dB)
100
10
75
55
30
25
35
45
50
60
70
80
AV = 2 V/V
RL = 500:
RF = 357:
VOUT = 1.0 VPP
11000
FREQUENCY (MHz)
-70
-50
-30
-10
BALANCE ERROR (dBc)
100
10
-20
-40
-60
-15
-25
-35
-45
-55
-65
V+ = +2.5V
V- = -2.5V
RL = 500:
RF = 357:
AV = 1 V/V
V+ = +5V
V- = -5V
LMH6552
SNOSAX9H –APRIL 2007–REVISED MARCH 2013
www.ti.com
Typical Performance Characteristics V+= +5V, V−=−5V (continued)
(TA= 25°C, RF= RG= 357Ω, RL= 500Ω, AV= 1, for single ended in, differential out, unless specified).
CMRR Balance Error
Figure 34. Figure 35.
Noise Figure Noise Figure
Figure 36. Figure 37.
Input Noise Differential S-Parameter Magnitude
vs. vs.
Frequency Frequency
Figure 38. Figure 39.
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Product Folder Links: LMH6552
50 60 70 80 90 100
-100
-95
-90
-85
-80
-75
-70
-65
IMD 3 (dBc)
CENTER FREQUENCY (MHz)
V+ = +2.5V
V- = -2.5V
V+ = +5V
V- = -5V
RL = 800:
RF = 360:
AV = +2
VOD = 2 VPP
SINGLE-ENDED INPUT
200 kHz SPACING
10 100 1000
-300
-200
-100
0
100
200
300
400
PHASE (°)
FREQUENCY (MHz)
S11
S22
S12
S11
(SINGLE-ENDED INPUT) S21
V+ = +5V
V- = -5V
AV = 1 V/V
0 1 2 3 4 5 6 7
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
IMD 3 (dBc)
DIFFERENTIAL VOUT (VPP)
fc = 75 MHz (200 kHz SPACING)
SINGLE-ENDED INPUT
RL = 200:
RL = 800:
V+ = +5V
V- = -5V
RF = 357:
AV = 2 V/V
LMH6552
www.ti.com
SNOSAX9H –APRIL 2007–REVISED MARCH 2013
Typical Performance Characteristics V+= +5V, V−=−5V (continued)
(TA= 25°C, RF= RG= 357Ω, RL= 500Ω, AV= 1, for single ended in, differential out, unless specified).
Differential S-Parameter Phase 3rd Order Intermodulation Products
vs. vs.
Frequency VOUT
Figure 40. Figure 41.
3rd Order Intermodulation Products 3rd Order Intermodulation Products
vs. vs.
VOUT Center Frequency
Figure 42. Figure 43.
Copyright © 2007–2013, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Links: LMH6552
LMH6552
SNOSAX9H –APRIL 2007–REVISED MARCH 2013
www.ti.com
APPLICATION INFORMATION
The LMH6552 is a fully differential current feedback amplifier with integrated output common mode control,
designed to provide low distortion amplification to wide bandwidth differential signals. The common mode
feedback circuit sets the output common mode voltage independent of the input common mode, as well as
forcing the V+and V−outputs to be equal in magnitude and opposite in phase, even when only one of the inputs
is driven as in single to differential conversion.
The proprietary current feedback architecture of the LMH6552 offers gain and bandwidth independence with
exceptional gain flatness and noise performance, even at high values of gain, simply with the appropriate choice
of RF1 and RF2. Generally RF1 is set equal to RF2, and RG1 equal to RG2, so that the gain is set by the ratio RF/RG.
Matching of these resistors greatly aff