UM-GP-005

Advanced Analog GreenPAK Evaluation Board

User Manual

Revision 1.2

21-Mar-2022

CFR0012

9 of 21

© 2022 Renesas Electronics Corporation

4.2

EVB Section Descriptions

The evaluation board separates the key features of AA PAK into spatially grouped sections on the

PCB. These features include the OpAmp, the rheostats, and the analog switches. The information

below provides application ideas and lists the associated TP connections for each section. Note that

many of these test points interact with multiple features.

Refer to Section 5 for specific

application examples that demonstrate how to leverage the EVB’s circuit

layout to build a variety of different circuits.

4.2.1

OpAmp 0/1 Sections

The EVB layout provides easy access to configure the OpAmp devices into a variety of different

common topologies including the following:

● Voltage Follower

● Inverting, Non-Inverting Amplifier

● Summing, Difference Amplifier

● Instrumentation Amplifier

● Integrator, Differentiator

● Active Filters (Sallen-Key, Multiple Feedback)

● Transimpedance Amplifier

Cross reference the list of OpAmp test points in Table 3 with the image of the EVB

’s silkscreen shown

in Figure 1.

Table 3: OpAmp TP List

Section

IO

TP List

OpAmp 0

Input

X1, X2, X4, X5, X7, X15

Output

X13, X28

OpAmp 1

Input

X20, X21, X24, X25, X26, X27

Output

X10, X17

InAmp

Output

X9

4.2.2

Rheostat 0/1 Sections

The rheostat section of the EVB contains a variety of optional connections to VDDA, GND, the OpAmp

Inputs/Outputs, and the EVB

’s bias nodes. These connections can be made through the SMD footprints

by using a combination of resistors and short circuits connections. For Auto-Trim applications not using

the OpAmp outputs, external wires can be used to connect the rheostat TPs directly to either of the

Chopper ACMP inputs at IO1 and IO4.

A few rheostat example applications include:

● Vref Generation

● Amplifier Offset Trim

● Amplifier Gain Trim

● Filter Frequency Trim

The test points associated with each rheostat are shown in Table 4.