+/-10V (Dual 10V) to Single-Supply Signal Converter for ADC
- Rajkumar Sharma
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This board will make your work easy if you want to interface +/- 10V (Dual 10V) device or sensor to single-supply signal ADC. This tiny project has been made for industrial and process control applications and provides an easy interface between +/-10V (Dual 10V) sensor or device to single-supply ADC. Connect +/-10V sensor/device to pin 3 of connector CN1, and circuit outputs 0.5V to 4.5V at pin 3 of connector CN2. The operating supply of the circuit is 5V and it draws few milliamps of current. The project is also provided with optional precision Ref voltage for accurate output.
Testing this project is easy, close jumper J1 to VCC, J2 to GND, close the solder jumper J3, keep jumper J4 open, apply 5V DC to pin 1 and 2 of CN2, connect +/-10V source to pin 3 (+I) and GND. Measure the output at pin 3 (OP) of CN2.
The INA159 is a high slew rate, G = 1/5 difference amplifier consisting of a precision op amp with a precision resistor network. The gain of 1/5 makes the INA159 useful to couple ±10V signals to single-supply analog-to-digital converters (ADCs), particularly those operating on a single +5V supply. The on-chip resistors are laser-trimmed for accurate gain and high common-mode rejection. Excellent temperature coefficient of resistance (TCR) tracking of the resistors maintains gain accuracy and common-mode rejection over temperature. The input common-mode voltage range extends beyond the positive and negative supply rails. It operates on +1.8V to +5.5V single or split supplies. The INA159 reference input uses two resistors for easy mid-supply or reference biasing. The difference amplifier is the foundation of many commonly-used circuits. The INA159 provides this circuit function without using an expensive external precision resistor network.
- Operating Supply 5V DC
- Input +/-10V (Dual 10V) Sensor or Industrial Device
- Output 0.5V to 4.5V DC (ADC)
- PCB dimensions: 26.51 x 16.51 mm
|NO||QNTY.||REF.||DESC||MANUFACTURER||SUPPLIER||SUPPLIER PART NO|
|1||2||CN1,CN2||4 PIN MALE HEADER 2.54MM PITCH||WURTH||DIGIKEY||732-5317-ND|
|2||1||C1||10uF/16V SMD SIZE 1210 OR 1206||MURATA/YAGEO||DIGIKEY|
|3||1||C2||0.1uF/50V SMD SIZE 0805||MURATA/YAGEO||DIGIKEY|
|4||1||C3||1KPF/50V SMD SIZE 0805||MURATA/YAGEO||DIGIKEY|
|6||2||J3,J4||PCB JUMPER/SOLDER JUMPER|
|8||2||R2,R3||10E 5% SMD SIZE 0805||MURATA/YAGEO||DIGIKEY|
|10||2||SHUNT||2.54MM PITCH FEMALE||SULINS||DIGIKEY||S9001-ND|
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