Datasheet

ADG611/ADG612/ADG613
Rev. A | Page 13 of 16
APPLICATIONS INFORMATION
Figure 23 illustrates a photodetector circuit with programmable
gain. With the resistor values shown in this figure, gains in the
range of 2 to 16 can be achieved by using different combinations
of switches.
R1
33kΩ
R2
510kΩ
R4
240kΩ
R5
240kΩ
R6
120kΩ
R7
120kΩ
R8
120kΩ
R3
510kΩ
R9
120kΩ
R9
120kΩ
S1 D1
S2 D2
S3 D3
S4 D4
GND
C1
2.5V
D1
5V
V
OUT
5V
2.5V
GAIN RANGE: 2 TO 16
(LSB) IN1
IN2
IN3
(
MSB) IN4
02753-023
Figure 23. Photodetector Circuit with Programmable Gain