LT1007, LT1007A, LT1037, LT1037A
LOW-NOISE, HIGH-SPEED, PRECISION OPERATIONAL AMPLIFIERS
SLOS017C – D3195, FEBRUARY 1989 – REVISED JANUARY 1993
TYPICAL CHARACTERISTICS
LT1007
LT1007
VOLTAGE-FOLLOWER
VOLTAGE-FOLLOWER
SMALL-SIGNAL PULSE RESPONSE
LARGE-SIGNAL PULSE RESPONSE
80
60
8
6
V
= ±15 V
V
= ± 15 V
CC±
= 1
L
CC±
= – 1
A
A
V
V
A
C
= 15 pF
= 25°C
T
= 25°C
T
A
40
4
20
0
2
0
–2
–4
–20
–40
–60
–80
–6
–8
0
2
4
6
8
10
12
14
16
0
0.5
1
1.5
2
2.5
3
3.5
4
t – Time – µs
t – Time – µs
Figure 33
Figure 34
APPLICATION INFORMATION
general
The LT1007- and LT1037-series devices may be inserted directly into OP-07, OP-27, OP-37, and 5534 sockets
with or without removal of external-compensation or nulling components. In addition, the LT1007 and LT1037
may be fitted to µA741 sockets by removing or modifying external nulling components.
offset voltage adjustment
The input offset voltage and its change with temperature of the LT1007 and LT1037 are permanently trimmed
to a low level at wafer testing . However, if further adjustment of V is necessary, the use of a 10-kΩ nulling
IO
potentiometer, as shown in Figure 35, will not degrade drift with temperature. Trimming to a value other than
zero creates a drift of V /300 µV/°C (e.g., if V is adjusted to 300 µV, the change in temperature coefficient
IO
IO
will be 1 µV/°C).
The adjustment range with a 10-kΩ potentiometer is approximately ±2.5 mV. If a smaller adjustment range is
needed, the sensitivity and resolution of the nulling can be improved by using a smaller potentiometer in
conjunction with fixed resistors. The example in Figure 36 has an approximate null range of ±200 µV.
offset voltage and drift
Unless proper care is exercised, thermocouple effects at the contacts to the input terminals, caused by
temperaturegradientsacrossdissimilarmetals, canexceedtheinherenttemperaturecoefficientoftheamplifier.
Aircurrentsshouldbeminimized, packageleadsshouldbeshort, inputleadsshouldbeclosetogether, andinput
leads should be at the same temperature.
16
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