Universal Instrumentation Amplifier Module for VSSOP8 Package with On-Board Reference

Rajkumar Sharma
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SKU: EL135564
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This is a universal instrumentation amplifier module that can be used to develop and test instrumentation amplifier circuits. The board can accommodate VSSOP8 devices such as INA126, INA333, INA155, INA156 from Texas Instruments. All capacitors are ceramic type with size 0805 and resistor size is also 0805. It supports dual supply or single supply. You should install R8 0 Ohms for a single supply usage. Various capacitors and resistors can be installed as per application requirements. D1 Power LED. Board has also a 2.5V precision reference voltage chip. Jumper J1 is provided to select the 2.5V reference voltage to the INA333 Amplifier. An external reference voltage can be fed through CN1 Pin 2. In this case Open Jumper J1. Also, a small prototyping area is provided.

Note: The board can be used with various amplifiers such as INA126, INA333, INA155, and INA156

Features

Single Supply 5V DC for INA333 (Range 1.8V to 5.5V), Single Supply: 4.5 V to 36 V, Dual Supply: ±2.25 V to ±18 V
On Board Reference Voltage Generator Chip (Available Reference 2.5V, 5V, 1.2V)
On Board Power LED
On Board Jumper J1 for Reference Voltage Selection, External or Internal
Header Connector for Inputs, Outputs, and Supply
Small Prototype Area Provided
Gain Adjustable 1 to 1000 Using Multiturn Trimmer Potentiometer
PCB Dimensions 37.15 x 19.21 mm

Applications

Bridge Amplifiers
ECG Amplifiers
Pressure Sensors
Medical Instrumentation
Portable Instrumentation
Weigh Scales
Thermocouple Amplifiers
RTD Sensor Amplifiers
Data Acquisition

Connections and Other Details

CN 1: Pin 1=VCC, Pin2=2.5V Ref Out, Pin3=Signal -Input, Pin4=GND, Pin5=Signal +input, Pin6=-VEE
PR1: Gain Adjust Multiturn Pot 1 To 1000
D1: Power LED
Jumper J1: Internal Reference 2.5V Selection, Open for External Reference Input
U1: Reference Voltage Generator 2.5V Output
Resistor R8: Use 0Ohms for Single Supply, Open for Dual Supply Input

Schematic

Parts List

NO.	QNTY.	DESC.	REF.	MANUFACTURER	SUPPLIER PART NO
1	1	CN1	6 PIN MALE HEADER PITCH 2.54MM	WURTH	732-5319-ND
2	8	C1,C2,C3,R7,C7,C11,C12,R3	DNP/AS PER USER REQUIRMENT
3	2	C4,C10	10uF/16V CERMIC SMD SIZE 0805	MURATA/YAGEO
4	4	C5,C6,C8,C9	100nF/50V CERAMIC SMD SIZE 0805	MURATA/YAGEO
6	1	D1	LED RED SMD SIZE 0805	OSRAM	475-1278-1-ND
7	1	J1	JUMPER- 2 PIN MALE HEADER PITCH 2.54MM	WURTH	732-5315-ND
8	1	PR1	100K MULTITURN TRIMMER POT	BOURNS	3296W-1-104
9	1	R1	1K 5% SMD SIZE 0805	MURATA/YAGEO
10	1	R2	100E 1% SMD SIZE 0805	MURATA/YAGEO
12	4	R4,R5,R6,R8	0E SMD SIZE 0805	MURATA/YAGEO
13	1	U1	REF5025IDGKT 8VSSOP	TI	296-24499-1-ND
14	1	U2	INA333 8VSSOP	TI	296-23564-1-ND
15	1	J1-SHUNT	SHUNT FOR JUMPER J1	SULLINS CONNECT	S9001-ND