Datasheet

12
LT1007/LT1037
sn100737 100737fbs
TYPICAL APPLICATIONS
U
Infrared Detector Preamplifier
1007/37 TA08
IR RADIATION
OPTICAL
CHOPPER
–
+
LT1007
50mA
15V
6
4
73
2
OUTPUT TO
DEMODULATOR
SYNCHRONOUS
CHOPPED DETECTOR
OUTPUT
PHOTOCONDUCTIVE
INFRARED DETECTOR
HgCdTe type
INFRA-RED ASSOCIATES, INC.
100µF
392k*
15V
–15V
+
+
100µF
10µF
+
392Ω*
392Ω*
267Ω*
2N2219A
33Ω
10Ω
1k
+
100µF
13Ω AT 77°K
*1% METAL FILM
Precision Amplifier Drives 300Ω Load to ±10V
1007/37 TA05
365Ω
1%
20k
5%
10k
TRIM
–
+
LT1037
–
+
LT1007
2
INPUT
3
2
3
6
6
OUTPUT
±10V
15Ω
5%
15Ω
5%
R
L
300Ω
340k
1%
THE ADDITION OF THE LT1007 DOUBLES THE AMPLIFIER’S OUTPUT DRIVE
TO ±33mA. GAIN ACCURACY IS 0.02%, SLIGHTLY DEGRADED COMPARED
TO ABOVE BECAUSE OF SELF-HEATING OF THE LT1037 UNDER LOAD.
Microvolt Comparator with Hysteresis
1007/37 TA04
OUTPUT
POSITIVE FEEDBACK TO ONE OF THE NULLING TERMINALS
CREATES APPROXIMATELY 5µV OF HYSTERESIS.
OUTPUT CAN SINK 16mA.
INPUT OFFSET VOLTAGE IS TYPICALLY CHANGED LESS
THAN 5µV DUE TO THE FEEDBACK.
7
8
6
4
2
3
INPUT
–15V
15V
–
+
LT1007
100M
5%
365Ω
1%
15k
1%