Fast Buffer
LH0033 / LH0033C
FEATURES
••Slew rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 00V/µs
••Wi de range sin gle or du al suppl y op erati on
••Ban dw i dth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100M Hz
••High ou tput drive. . . . . . . . . . . . . . . ±10V wi th 50Ω l oad
••Lo w phase non-l inear ity . . . . . . . . . . . . . . . . 2 degrees
••Rise times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ns
••High input resistance:. . . . . . . . . . . . . . . . . . . . . . . 1010Ω
••High o u tput current (peak ) . . . . . . . . . . . . . . . . . 250m A
APPLICATIONS
••Coaxial Cable Driver
••Fast O p A mp Booster
••Flash Conve rter Driver
••V id eo Li ne Dr iv er
••High Speed Sample and Hold
••ATE Pi n Dri ver
••V ideo Am pli fi er
••Radar
••Sonar
••Boost OP Amp Output
••Isolate Capacit ance Load
GENERAL DESCRIPTIO N
The LH0033 is a high speed, FET input, voltage
follower/buffer designed to provide high current drive (up to
100mA) at frequencies from DC to over 100MHz. The
LH0033 slews at 1500V/µs and exhibits excellent phase
linearity up to 20MHz.
LH0033 is intended to fulfill a wide range of buf fer app lication s
such as high speed line drivers, video impedance
transformation, nuclear instrumentation amplifiers, op amp
isolation buffers f or driving react ive l oa ds an d high im pe danc e
input buffers for high speed A to Ds and comparators. In
addition, the LH0033 can continuously drive 50Ω coaxial
cables or be used as a yoke driver for high resolution CRT
displays.
This device is constructed using specially selected junction
FETs and active laser trimming to achieve guaranteed
performance specifications. The LH0033 is specified for
operat ion from -55oC to +125oC and the LH0033C is specif ied
from -25oC to 85oC. The LH0033 is available in a 2.2W met al
TO-8 package.
ORDERING INFORMATION
Part Package Temperature Range
LH0033G H12A (TO8 12 Lead ) -55oC to 125oC
LH0033CG H12A (TO8 12 Lead ) -25oC to 85oC
LLC
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A
123
4
5
6
789
10
11
12
OUTPUTINPUT
NC
LH0033
Metal Can Package
OFFSET
PRESET
OFFSET
ADJUST
NC NC
NC
C
V+
C
V
V-
V+
Case is electrically Isolated
Top View
Package H12A
CONNECTION DIAGRAM
ABSOLUTE M AXIM UM R A T INGS
If Military/Aerospace specified dev ices are r equired, please
contact Calogic Sales Office f or availability and spec ifications .
Supply Voltage (V+ - V-). . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Power Dissipat ion (See Cur ve s)
LH0033/LH00 33C . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2W
Junction Te mperature . . . . . . . . . . . . . . . . . . . . . . . . . . 175oC
Input Volt age . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±VSupply
Continuo us Output Curr ent
LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . ±100mA
Peak Output Current
LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . ±250mA
Lead Temp. (Solder ing, 10 s econds). . . . . . . . . . . . . . . 300 oC
Oper at ing Tem per atur e Ra nge
LH0033. . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to +125oC
LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . . . -25oC to +85oC
Stor age Tem per atur e Ra nge . . . . . . . . . . -6 5oC to +150 oC
LH0033 / LH0033C
LLC
SYMBOL CHARACTERISTICS LH0033 LH0033C UNITS CONDITIONS
MIN TYP MAX MIN TYP MAX
VOS Output Offset Voltage 5.0 10
15 12 20
25 mV
mV RS = 100Ω, TJ = 25oC,
VIN = 0V (Note 2), RS = 100Ω
∆VOS
∆TAverage Temperature
Coefficient of Offset Voltage 50 100 50 100 µV/oCR
S = 100Ω, VIN = 0V (Note 3)
IBInput Bias Current 250
2.5
10
500
5.0
20
pA
nA
nA
VIN = 0V
TJ = 25oC (Note 2)
TA = 25 oC (Note 4 )
TJ = TA = TMAX
AVVoltage Gain 0.97 0.98 1.00 0.96 0.98 1.00 V/V VO = ±10V, RS = 100Ω, RL = 1.0kΩ
RIN Input Impedance 1010 1011 1010 1011 ΩRL = 1kΩ
ROUT Output Impedance 6.0 10 6.0 10 ΩVIN = ±1.0V, RL = 1.0 k
V(SWING 1) Output Voltage Swing ±12 ±12 VVI = ±14V, RL = 1.0k
V(SWING 2) ±9.0 ±9.0 VI = ±10.5V, RL = 100Ω, TA = 25oC
ISSupply Current 18 22 18 24 mA VIN = 0V (Note 5)
PDPower Consumption 540 660 540 720 mW VIN = 0V
DC ELECTRICAL CHARACTERISTICS: The following specifications apply for supply voltage = ±15V unl ess otherwi se noted ( Note 1)
AC ELECTRIC AL CHARACTERISTICS: TJ = 2 5 oC, V S = ± 15V, RS = 5 0Ω, RL = 1. 0KΩ (Not e 3)
SYMBOL CHARACTERISTICS LH0033 LH0033C UNITS CONDITIONS
MIN TYP MAX MIN TYP MAX
SRSlew Rate 1000 1500 1000 1400 V/µsV
IN = ±10V
BW Bandwidth 100 100 MHz VIN = 1.0Vr ms
Phase Non- Linearity 2.0 2.0 degrees BW = 1.0Hz to 20MHz
RTRise Time 2.9 3.2 ns ∆VIN = 0.5V
Propagation Delay 1.2 1.5 ns ∆VIN = 0.5V
Harmonic Distortion <0.1 <0.1 % f>1kHz
Note 1: LH0033 is 100% production tested as specified at 25oC. Specifications at temperature extremes are verified by sample testing,
correla tion or periodic characterization.
Note 2: Specification is at 25oC j unc tion temperatur e due to requirements of high speed automatic test ing. Actual v alues at operating temperature
will exceed the value at TJ = 25oC. When s upply voltages are ±15V, no-load operating junction temperature may rise 40-60oC above ambient, and
more under load conditions . Accordingl y , VOS may change one to several mV, and IB wil l c hange s ignific ant ly during warm-up.
Note 3: Limits are guaranteed by sample testing, periodic characterization or correlation.
Note 4: M ea su red in still ai r 7 mi nutes after appl icatio n of po wer. Guaran tee d thro ug h correla te d aut om at ic pulse te st ing.
Note 5: Guaranteed through correlated automatic pulse testing at TJ = 25oC.
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A
LH0033 / LH0033C
LLC
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A
TYPICAL PERFO RM ANCE CHARACTERI STIC S
TIME (ns)
INPUT/OUTPUT VOLTAGE (V)
6
030
2
10 20
POSITIVE
PULSE RESPONSE
4
0
8
40 50 60
12
10
INPUT
OUTPUT
T
C
= +25˚C
R
L
= 1kΩ,R
S
= 50Ω
V
S
= ±15V
TEMPERATURE (˚C)
POWER DISSIPATION (W)
0.5
07525 50
POWER DISSIPATION
0100 125 150
2.0
1.5
1.0 AMBIENT
JA
θ= 100˚C/W
CASE
JC
θ= 60˚C/W
SUPPLY VOLTAGE (±V)
OUTPUT VOLTAGE (±V)
18
10
5
6
10
OUTPUT VOLTAGE
vs SUPPLY VOLTAGE
14
15 20
12
8
4
16 R
L
= 1kΩ
R
S
= 100kΩ
T
C
= +25˚C
FREQUENCY (MHz)
VOLTAGE GAIN (V/V)
0.8
1.0 10.0
0.4
2.0 5.0
FREQUENCY RESPONSE
0.6
0.2
1.0
5
PHASE LAG (DEGREES)
20.0 50 100
25
30
20
10
15
40
35
Av
φ
V
IN
= 1.0 Vrms
R
L
= 1kΩ
R
S
= 50Ω
V
S
= ±15V
SUPPLY VOLTAGE (±V)
SUPPLY CURRENT (±mA)
21
19
5
18
10
SUPPLY CURRENT
vs SUPPLY VOLTAGE
17
20
15 20
T
C
= +125˚C
T
C
= +25˚C
T
C
= -55˚C
TIME (ns)
INPUT/OUTPUT VOLTAGE (-V)
-6
0
-10
10
NEGATIVE
PULSE RESPONSE
-2
30 60
0
-8
-12
-4 INPUT
OUTPUT
T
C
= +25˚C
R
L
= 1kΩ
R
S
= 50Ω
V
S
= ±15V
20 5040
LH0033 / LH0033C
LLC
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A
TYPICAL PERFO RM ANCE CHARACTERI STICS (Continued)
TEMPERATURE (˚C)
RISE AND FALL TIME (ns)
8.0
4.0
-50
2.0
RISE AND FALL TIME
vs TEMPERATURE
6.0
150
00 50 100
t
r
R
L
= 1k
R
S
= 50Ω
V
S
= ±15V
t
f
TIME FROM POWER TURN-ON (MINUTES)
CURRENT – NORMALI ZED
TO CURRENT AT TIME = 0
100
0624
NORMALIZED INPUT BIAS
CURRENT DURING WARM-UP
1810
10
T
A
V
S
= ±15V
= 25˚C
TEMPERATURE (˚C)
INPUT BIAS CURRENT (nA)
10
05025
INPUT BIAS CURRENT
vs TEMPERATURE
1
0.001 75 100 125
0.100
0.010
V
S
= ±10V
V
S
= ±15V
V
S
= ±5V
INPUT VOLTAGE (V)
INPUT BIAS CURRENT (nA)
10 486
INPUT BIAS CURRENT
vs INPUT VOLTAGE
20-2
10
1.0
0.1
-6 -10
PULSE TESTED (T
J
V
S
= ±15V = 25˚C)
LH0033 / LH0033C
LLC
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A
APPLICAT ION INFORMATION:
Recomm ended La yout Pre cauti ons
RF/video printed ci rcuit board l ayout rul es should be followed
when using the LH0033 since it will provide power gain to
frequencies over 100MHz. Ground planes are recommended
and power suppli es should be decoupled a t each device with
low induct ance cap acit ors. In ad dition, g round p la ne shie ldin g
may be extended to the metal case of the device since it is
electrically isolated from internal circuitry. Alternatively the
case should be connected to the output to minimize input
capacitance.
Of fs et Voltage Adjust ment
The LH0033’s offset voltages have been actively trimmed by
laser to meet guaranteed s pecif icat ions w h en t he off set p re set
pin is shorted to the of fset adjust p in. If of fset n ul l is d esir able,
it is si mply obtained by leaving the offset preset pin open and
connecting a trim pot of 200Ω for the LH0033 between the
offset adjust pin and V–, as illust rated in Figur e 1.
Operation From Single Or As ymmetrical Power Supp lies
LH0033 may be used in applications where symmetrical
supplies are unavailable or not desirable. A typical ap plication
might be an interface to a MOS shift registe r where V+ = +5V
and V– = -12V. In this case, an apparent output offset occurs
due to the device’s voltage gain of less than unity. This
additiona l output error m ay be pre dict ed by:
∆VO ≅ (1−AV) (V+−V−)
2 = 0.005 (V+ −V−)
where:
A
V = No load voltage ga in, typically 0.99
V
+ = Positive supply volta ge
V
– = Nega tive supply vo ltage
For the above example, ∆VO would be -35mV. This may be
adjusted to zero as described in Figure 1. For AC coupled
applications, no additional offset occurs if the DC input is
properly biased as illustrated in the Typical Applications
section.
Short Circuit Protection
In order to optimize transient response and output swing,
output current limit has been omitted from the LH0033.
Short circuit protection may be added by inserting
appropriate value resistors between V+ and VC+ pins and
V– and VC– pi ns as il lustrated in Figure 2. Resistor values
may be pre dicted by:
R
LIM ≅ V+
ISC = V−
ISC
where:
I
SC ≤ 10 0 mA for LH0033
The inclusion of limiting resist or s in the collect ors of the o utput
transistors reduces output voltage swing. Decoupling VC+
and VC– pins with capacitors to ground will retain full output
swing for transient pulses. Alternate active current limit
techniques that retain full DC output swing are shown in
FIG URE 2 . Resist or Current Li m iti ng Usi n g Resi st or
10
7
6
INPUT 11
9
12
51
R
LIM
100
OUTPUT
R
LIM
100
C ≅ 0.1µF
C ≅ 0.1µF
LH0033
V+
V-
FIGURE 1. Off set Ze ro Ad ju st
200Ω9
11
1
6
+15V
5
7
INPUT
OFFSET
PRESET
(OPEN)
OFFSET
ADJUST
OUTPUT
-15V
10
LH0033 12
LH0033 / LH0033C
LLC
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A
Figure 3. In Figure 3, the current sources are saturated
during normal operati on, thus apply full supply voltage to the
VC pins. Under fault conditions, the voltage decreases as
requir ed by th e o verload.
For Figure 5:
R
LIM = VBE
ISC = 0.6V
60mA = 10Ω
Capacit ive Loading
The LH0033 is designed to drive capacitive loads such as
coaxial cables in excess of several thousand picofarads
without susceptibility to oscillation. However, peak current
resulting from (C × dV/dt) should be limited below absolute
maxim um peak curr ent ratings for the devices.
Thu s for the L H0 033:
( ∆VIN
∆t ) × CL ≤ IOUT ≤ ±250mA
In addition, power dissipation resulting from driving capaciti ve
loads plus standby power should be kept below total package
power rating:
P
Dpkg. ≥ PDC + PAC
P
Dpkg. ≥ (V +–V–) × IS + P AC
P
AC ≅ (Vp- p) 2 × f × CL
where:
Vp-p = Peak-to-pe ak outpu t voltage swing
f = Frequency
CL = Load Ca pacitance
Operati on Withi n An Op Amp Loop
LH0033 may be used as a current booster or isolator buffer
within a closed loop with op amps such as LH0032, or
CLM4124. An isolation resistor of 47Ω should be used bet ween
the op amp output and the input of LH0033. The wide bandwidth
and high slew rate of the LH00 33 assure that the loop has the
characteristics of the op amp and that additional rolloff is not
required.
Hardware
In or der to ut ilize the fu ll dr ive ca pabilities o f LH0033 , it should
be mounted with a heat sink particulary for extended
temperature operation. The case is isolated from the circuit
and ma y be connect e d to t he sy stem chassis.
Design Precaution
Power supply bypassing is necessary to prevent oscillation.
Low inductance ceramic disc capacitors with the shortest
practical lead lengths must be connected from each supply
lead (within <1⁄4" to 1⁄2" of the device package) to a ground
plane. Capacitors should be one or two 0.1µF in parallel;
adding a 4.7µF solid tantalum capacitor will hel p troublsome
instances.
FIGURE 3. Curren t Li mi ting Using Curr ent Sour ces
7
6
INPUT 1151OUTPUT
Q2
10
12
R
LIM
10
R
LIM
10
Q1
Q3
Q4
-15V
+15V
0.01µF
Q1 = Q2 = 2N2905
Q3 = Q4 = 2N2219
LH0033 9
30k
LH0033 / LH0033C
LLC
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A
Coaxial Cable Dr iv er
10
6
7
43
C1*
100
INPUT 51 11
9
12
5
*Select C1 for Optimum Pulse Response
50Ω
100
1
LH0033
V+
V-
High In put Im pedance AC Coupled Am pl ifi er
CASE
10
7
6
INPUT
4.7pF
11
9
12
5
0.1µF
0.1µFV-
1M
f
H
≥100MHz
LH0033
V+
0.001µF
OUTPUT
TYPIC AL APPLI CA T IONS
LH0033 / LH0033C
LLC
4. 5M Hz No t ch Fi l t er
10
7
6
11
9
12
51
R1
220Ω
C1
150pF
R1
220Ω
C2
300pF
R2
110
Ω
V
IN
C1
150pF
V+
V-
LH0033
1
f
0
=2πR
1
C
1
R
1
= 2R
2
C
1
=C
2
2
Sin gle Su pp l y A C A m pl i f ie r
CASE
10
7
6
INPUT 11
9
12
5
1M
OUTPUT
CC
V = 12.0V
0.001µF
LH0033
1
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A
Instrumentat io n S hi el d/ Li ne Drive r
10
7
6
100
INPUT 51
9
12
51CASE
11
100
LH0033
V-
V+
High Inp ut Impedance Compar at or w ith Of f set Adjust
+
-
+
-
10
11
9
12
1
5LH0033 LM711
5
3
4
7
6
10
OFFSET
ADJUST
7
INPUT
NO GO = LOGIC "1"
GO = LOGIC "0"
V
L.L.
V+
V+
V-
V-
V
U.L.
TYPIC AL APPLI CA T IONS ( Cont inue d)
LH0033 / LH0033C
LLC
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076 DS048 REV A
High Speed Sample and Hold
10
6
7
11
9
12
V-
LH0033
5
10
6
7
100
ANALOG
INPUT
9
7
5
V-
111
100
100
C1*
1000pF
1
OUTPUT
LOGIC
INPUT
1
2
LH0033
*Polyca rbonate or Teflon
TM
V
+
V+
TYPIC AL APPLI CA T IONS ( Cont inue d)
