UM-GP-005

Advanced Analog GreenPAK Evaluation Board

User Manual

Revision 1.2

21-Mar-2022

CFR0012

15 of 21

© 2022 Renesas Electronics Corporation

Table 8: Instrumentation Amplifier Build Configuration

#

Function

Value

Designator

QTY

1

Non-Inverting Input (VIN+)

-

X24

1

2

Inverting Input (VIN-)

-

X4

1

3

InAmp Vref

-

X8

1

4

Output

-

X9

1

5

Gain Resistor - Series

43

kΩ

Z5

1

6

Gain Resistor - Parallel

10 kΩ

Z32

1

7

Feedback Resistor

100 k

Ω

Z22, Z79

2

8

Reference Voltage Divider

47 kΩ

Z60

1

9

Shorts

-

Z9, Z10, Z11, Z17, Z18, Z21, Z23, Z31, Z40,

Z51, Z61, Z70, Z72, Z73, Z74, Z78

15

10

Additional Headers

-

GX1, GX10, GX11, GX13, GX16

PX2, PX3, PX6, PX7

X3, X5, X6, X10, X13, X17, X19, X26

16

Although this implementation focuses on fine tuning the gain to a specific level, other topologies

support a wider range of gain similar in functionality to that of a programmable gain amplifier.

The InAmp can also be implemented without the use of the digital rheostats.