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AD693 Loop-powered 4-20mA Sensor Amplifier Datasheet
Photograph
Features
Instrumentation Amplifier Front End
Loop-Powered Operation
Precalibrated Output Spans: 4-20mA Unipolar, 0-20mA Unipolar, 12 ±8mA Bipolar
Precalibrated 100 ohm RTD Interface
6.2V Reference with Up to 3.5mA of Current Available
Uncommitted Auxiliary Amp for Extra Flexibility
Optional External Pass Transistor to Reduce Self-Heating Errors
Pin Layout
Pin Description
| Pin Number | Description |
|---|---|
| 1 | AUX- - Auxiliary Amplifier Inverting Input |
| 2 | AUX+ - Auxiliary Amplifier Noninverting Input |
| 3 | 150mV - See Datasheet |
| 4 | 75mV - See Datasheet |
| 5 | 100ohm - 100 ohm Resistor |
| 6 | COM - Common |
| 7 | Iout - Current Output |
| 8 | BOOST - See Datasheet |
| 9 | Vin - Voltage Input |
| 10 | Iin - Current Input |
| 11 | 12mA - See Datasheet |
| 12 | ZERO - Zeroing Input |
| 13 | 4mA - See Datasheet |
| 14 | Vref - Voltage Reference |
| 15 | P1 - See Datasheet |
| 16 | P2 - See Datasheet |
| 17 | +SIG - Noninverting Signal Input |
| 18 | -SIG - Inverting Signal Input |
| 19 | Ix - Auxiliary Amplifier Ix Output |
| 20 | Vx - Auxiliary Amplifier Vx Output |
Dimensional Drawing
Technical Data
