DG300A Datasheet, PDF (10/10 Pages) Intersil Corporation – TTL-Compatible, CMOS Analog Switches

DG300A/301A/302A/303A
Applications (Cont’d)
+15 V
–15 V
+15 V
CMOS Logic
Input Select
High = Diff. IN B
Diff. IN A
Diff. IN B
+15 V
–15 V
+
–
R₂
75 kW
R₄
75 kW
R₆
75 kW
DG302A
CMOS Logic
Gain Select
High = A_V = 101
R₁
16 kW
Ri₁
1.5 kW
DG301A
GND
R₂
75 kW
Voltage gain of the instrumentation amplifier is:
A_V = 1
+
2R₂
R₁
(In the circuit shown, A_V1 = 10.4, A_V2 = 101)
V_OUT
R₅
75 kW
+15 V
R₇
67 kW
V_OSNULL
50 kW
–15 V
Figure 6. Low Power Instrumentation Amplifier with Digitally Selectable Inputs and Gain
10
Siliconix
S-52880—Rev. C, 28-Apr-97