Fast Buffer
LH0033 / LH0033C
FEATURES
Slew rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500V/
s
Wide range single or dual supply operation
Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100MHz
High output drive . . . . . . . . . . . . . . .
10V with 50
load
Low phase non-linearity . . . . . . . . . . . . . . . . 2 degrees
Rise times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ns
High input resistance:. . . . . . . . . . . . . . . . . . . . . . . 10
10
High output current (peak) . . . . . . . . . . . . . . . . . 250mA
APPLICATIONS
Coaxial Cable Driver
Fast Op Amp Booster
Flash Converter Driver
Video Line Driver
High Speed Sample and Hold
ATE Pin Driver
Video Amplifier
Radar
Sonar
Boost OP Amp Output
Isolate Capacitance Load
GENERAL DESCRIPTION
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/
s and exhibits excellent phase
linearity up to 20MHz.
LH0033 is intended to fulfill a wide range of buffer applications
such as high speed line drivers, video impedance
transformation, nuclear instrumentation amplifiers, op amp
isolation buffers for driving reactive loads and high impedance
input buffers for high speed A to Ds and comparators. In
addition, the LH0033 can continuously drive 50
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
operation from -55
o
C to +125
o
C and the LH0033C is specified
from -25
o
C to 85
o
C. The LH0033 is available in a 2.2W metal
TO-8 package.
ORDERING INFORMATION
Part
Package
Temperature Range
LH0033G
H12A (TO8 12 Lead)
-55
o
C to 125
o
C
LH0033CG
H12A (TO8 12 Lead)
-25
o
C to 85
o
C
CORPORATION
CALOGIC CORPORATION
, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
1
2
3
4
5
6
7
8
9
10
11
12
OUTPUT
INPUT
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 MAXIMUM RATINGS
If Military/Aerospace specified devices are required, please
contact Calogic Sales Office for availability and specifications.
Supply Voltage (V
+
- V
-
). . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Power Dissipation (See Curves)
LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2W
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 175
o
C
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V
Supply
Continuous Output Current
LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . .
100mA
Peak Output Current
LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . .
250mA
Lead Temp. (Soldering, 10 seconds). . . . . . . . . . . . . . . 300
o
C
Operating Temperature Range
LH0033. . . . . . . . . . . . . . . . . . . . . . . . . . . . -55
o
C to +125
o
C
LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . . . -25
o
C to +85
o
C
Storage Temperature Range . . . . . . . . . . -65
o
C to +150
o
C
LH0033 / LH0033C
CORPORATION
SYMBOL
CHARACTERISTICS
LH0033
LH0033C
UNITS
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
V
OS
Output Offset Voltage
5.0
10
15
12
20
25
mV
mV
R
S
= 100
, T
J
= 25
o
C,
V
IN
= 0V (Note 2), R
S
= 100
V
OS
T
Average Temperature
Coefficient of Offset Voltage
50
100
50
100
V/
o
C
R
S
= 100
, V
IN
= 0V (Note 3)
I
B
Input Bias Current
250
2.5
10
500
5.0
20
pA
nA
nA
V
IN
= 0V
T
J
= 25
o
C (Note 2)
T
A
= 25
o
C (Note 4)
T
J
= T
A
= T
MAX
A
V
Voltage Gain
0.97
0.98
1.00
0.96
0.98
1.00
V/V
V
O
=
10V, R
S
= 100
, R
L
= 1.0k
R
IN
Input Impedance
10
10
10
11
10
10
10
11
R
L
= 1k
R
OUT
Output Impedance
6.0
10
6.0
10
V
IN
=
1.0V, R
L
= 1.0k
V
(SWING 1)
Output Voltage Swing
12
12
V
V
I
=
14V, R
L
= 1.0k
V
(SWING 2)
9.0
9.0
V
I
=
10.5V, R
L
= 100
, T
A
= 25
o
C
I
S
Supply Current
18
22
18
24
mA
V
IN
= 0V (Note 5)
P
D
Power Consumption
540
660
540
720
mW
V
IN
= 0V
DC ELECTRICAL CHARACTERISTICS: The following specifications apply for supply voltage =
15V unless otherwise noted (Note 1)
AC ELECTRICAL CHARACTERISTICS: T
J
= 25
o
C, V
S
=
15V, R
S
= 50
, R
L
= 1.0K
(Note 3)
SYMBOL
CHARACTERISTICS
LH0033
LH0033C
UNITS
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
S
R
Slew Rate
1000
1500
1000
1400
V/
s
V
IN
=
10V
BW
Bandwidth
100
100
MHz
V
IN
= 1.0Vrms
Phase Non- Linearity
2.0
2.0
degrees
BW = 1.0Hz to 20MHz
R
T
Rise Time
2.9
3.2
ns
V
IN
= 0.5V
Propagation Delay
1.2
1.5
ns
V
IN
= 0.5V
Harmonic Distortion
<0.1
<0.1
%
f>1kHz
Note 1: LH0033 is 100% production tested as specified at 25
o
C. Specifications at temperature extremes are verified by sample testing,
correlation or periodic characterization.
Note 2: Specification is at 25
o
C junction temperature due to requirements of high speed automatic testing. Actual values at operating temperature
will exceed the value at T
J
= 25
o
C. When supply voltages are
15V, no-load operating junction temperature may rise 40-60
o
C above ambient, and
more under load conditions. Accordingly, V
OS
may change one to several mV, and I
B
will change significantly during warm-up.
Note 3: Limits are guaranteed by sample testing, periodic characterization or correlation.
Note 4: Measured in still air 7 minutes after application of power. Guaranteed through correlated automatic pulse testing.
Note 5: Guaranteed through correlated automatic pulse testing at T
J
= 25
o
C.
CALOGIC CORPORATION
, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
LH0033 / LH0033C
CORPORATION
CALOGIC CORPORATION
, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
TYPICAL PERFORMANCE CHARACTERISTICS
TIME (ns)
INPU
T
/
O
U
T
P
UT
V
O
LT
AG
E (
V
)
6
0
30
2
10
20
POSITIVE
PULSE RESPONSE
4
0
8
40
50
60
12
10
INPUT
OUTPUT
T
C
= +25C
R
L
= 1k
, R
S
= 50
V
S
= 15V
TEMPERATURE (C)
PO
W
E
R
D
I
S
S
IP
AT
I
O
N
(W)
0.5
0
75
25
50
POWER DISSIPATION
0
100
125
150
2.0
1.5
1.0
AMBIENT
JA
= 100C/W
CASE
JC
= 60C/W
SUPPLY VOLTAGE (V)
OUT
P
U
T
VO
LT
AGE
(V)
18
10
5
6
10
OUTPUT VOLTAGE
vs SUPPLY VOLTAGE
14
15
20
12
8
4
16
R
L
= 1k
R
S
= 100k
T
C
= +25C
FREQUENCY (MHz)
V
O
LT
AG
E
G
A
I
N
(V/
V
)
0.8
1.0
10.0
0.4
2.0
5.0
FREQUENCY RESPONSE
0.6
0.2
1.0
5
PH
ASE
LAG
(D
EGREE
S
)
20.0
50
100
25
30
20
10
15
40
35
Av
V
IN
= 1.0 Vrms
R
L
= 1k
R
S
= 50
V
S
= 15V
SUPPLY VOLTAGE (V)
SUPPLY C
U
RR
ENT
(m
A
)
21
19
5
18
10
SUPPLY CURRENT
vs SUPPLY VOLTAGE
17
20
15
20
T
C
= +125C
T
C
= +25C
T
C
= -55C
TIME (ns)
I
N
PU
T
/
OUT
P
U
T
VO
L
T
AG
E
(-V)
-6
0
-10
10
NEGATIVE
PULSE RESPONSE
-2
30
60
0
-8
-12
-4
INPUT
OUTPUT
T
C
= +25C
R
L
= 1k
R
S
= 50
V
S
= 15V
20
50
40
LH0033 / LH0033C
CORPORATION
CALOGIC CORPORATION
, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
TEMPERATURE (C)
R
I
SE
AN
D
F
A
LL
T
I
M
E
(n
s
)
8.0
4.0
-50
2.0
RISE AND FALL TIME
vs TEMPERATURE
6.0
150
0
0
50
100
t
r
R
L
= 1k
R
S
= 50
V
S
= 15V
t
f
TIME FROM POWER TURN-ON (MINUTES)
C
U
RR
ENT
N
O
R
M
ALI
Z
ED
TO
C
U
RR
ENT
A
T
TIM
E
=
0
100
0
6
2
4
NORMALIZED INPUT BIAS
CURRENT DURING WARM-UP
1
8
10
10
T
A
V
S
= 15V
= 25C
TEMPERATURE (C)
I
N
PU
T
BI
AS
CU
R
R
EN
T
(nA)
10
0
50
25
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)
I
N
PU
T
BI
AS
CU
R
R
EN
T
(nA)
10
4
8 6
INPUT BIAS CURRENT
vs INPUT VOLTAGE
2 0 -2
10
1.0
0.1
-6
-10
PULSE TESTED (T
J
V
S
= 15V
= 25C)
LH0033 / LH0033C
CORPORATION
CALOGIC CORPORATION
, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
APPLICATION INFORMATION:
Recommended Layout Precautions
RF/video printed circuit board layout rules should be followed
when using the LH0033 since it will provide power gain to
frequencies over 100MHz. Ground planes are recommended
and power supplies should be decoupled at each device with
low inductance capacitors. In addition, ground plane shielding
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.
Offset Voltage Adjustment
The LH0033's offset voltages have been actively trimmed by
laser to meet guaranteed specifications when the offset preset
pin is shorted to the offset adjust pin. If offset null is desirable,
it is simply obtained by leaving the offset preset pin open and
connecting a trim pot of 200
for the LH0033 between the
offset adjust pin and V
, as illustrated in Figure 1.
Operation From Single Or Asymmetrical Power Supplies
LH0033 may be used in applications where symmetrical
supplies are unavailable or not desirable. A typical application
might be an interface to a MOS shift register 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
additional output error may be predicted by:
V
O
(
1
-
A
V
)
(
V
+
-
V
-
)
2
=
0.005
(
V
+
-
V
-
)
where:
A
V
= No load voltage gain, typically 0.99
V
+
= Positive supply voltage
V
= Negative supply voltage
For the above example,
V
O
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 V
C
+
pins and
V
and V
C
pins as illustrated in Figure 2. Resistor values
may be predicted by:
R
LIM
V
+
I
SC
=
V
-
I
SC
where:
I
SC
100mA for LH0033
The inclusion of limiting resistors in the collectors of the output
transistors reduces output voltage swing. Decoupling VC
+
and V
C
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
FIGURE 2. Resistor Current Limiting Using Resistor
10
7
6
INPUT
11
9
12
5
1
R
LIM
100
OUTPUT
R
LIM
100
C
0.1
F
C
0.1
F
LH0033
V +
V -
FIGURE 1. Offset Zero Adjust
200
9
11
1
6
+15V
5
7
INPUT
OFFSET
PRESET
(OPEN)
OFFSET
ADJUST
OUTPUT
-15V
10
LH0033
12
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