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Zero Drift Instrumentation Amplifier

$3.95$24.95

Out of stock
PCB Assy R3
Instrumentation Amp ICON
Inst Amp PCB
AD8230 Schematic

Zero Drift Instrumentation Amplifier

$3.95$24.95

The AD8230 is a low drift, differential sampling, precision instrumentation amplifier. Auto-zeroing reduces offset voltage drift to less than 50 nV/°C. The AD8230 is well-suited for thermocouple and bridge transducer applications. The AD8230’s high CMR of 110 dB (minimum) rejects line noise in measurements where the sensor is far from the instrumentation.

The 16 V rail-to-rail, common-mode input range is useful for noisy environments where ground potentials vary by several volts. Low frequency noise is kept to a minimal 3 μV p-p, making the AD8230 perfect for applications requiring the utmost dc precision. Moreover, the AD8230 maintains its high performance over the extended industrial temperature range of −40°C to +125°C.

Two external resistors are used to program the gain. By using matched external resistors, the gain stability of the AD8230 is much higher than instrumentation amplifiers that use a single resistor to set the gain. In addition to allowing users to program the gain between 101 and 1000, users can adjust the output offset voltage.

The gain resistors may be inserted as needed without soldering using the built in Mill-Max insertion terminals or the resistors may be permenantly attached via the solderable turret terminals.

This is an offshoot of one of the Instrumentation Amplifiers I did for Hackaday

instrumentation1-sch

 

Clear selection

FEATURES

  • Resistor programmable gain range: 101 to 1000
  • Supply voltage range: ±4 V to ±8 V
  • Rail-to-rail input and output
  • Maintains performance over −40°C to +125°C
  • Excellent ac and dc performance
  • 110 dB minimum CMR @ 60 Hz, G = 10 to 1000
  • 10 μV maximum offset voltage (RTI, ±5 V operation)
  • 50 nV/°C maximum offset drift
  • 20 ppm maximum gain nonlinearity

Description

Zero Drift Instrumentation Amplifier – The AD8230 is a low drift, differential sampling, precision instrumentation amplifier. Auto-zeroing reduces offset voltage drift to less than 50 nV/°C. The AD8230 is well-suited for thermocouple and bridge transducer applications. The AD8230’s high CMR of 110 dB (minimum) rejects line noise in measurements where the sensor is far from the instrumentation.

The 16 V rail-to-rail, common-mode input range is useful for noisy environments where ground potentials vary by several volts. Low frequency noise is kept to a minimal 3 μV p-p, making the AD8230 perfect for applications requiring the utmost dc precision. Moreover, the AD8230 maintains its high performance over the extended industrial temperature range of −40°C to +125°C.
Two external resistors are used to program the gain. By using matched external resistors, the gain stability of the AD8230 is much higher than instrumentation amplifiers that use a single resistor to set the gain. In addition to allowing users to program the gain between 101 and 1000, users can adjust the output offset voltage.

The gain resistors may be inserted as needed without soldering using the built in Mill-Max insertion terminals or the resistors may be permenantly attached via the solderable turret terminals.

This is an offshoot of one of the Instrumentation Amplifiers I did for Hackaday

Includes 3 wire power cable assy compatible with Herdware-3wire.

Schematic

Wiring Diagram and Use Instructions

Gain-Calculation-AD8230 Spreadsheet

AD8230 Datasheet

Gain

GAIN = 2(1+RX1/RX2)
GAIN RX1 RX2 Actual Gain
2 0 none 2
10 8.06K 2K 10
50 12.1K 499 50.5
100 9.76K 200 99.6
200 10K 100 202
500 49.9K 200 501
1000 100K 200 1002

Kit comes with one each of the 1% resistor values shown: 100, 200, 499, 2K, 8.06K, 12.1K, 9.76K, 10K, 49.9K, 100K

Kit includes 4 standoffs.

Weight .2 lbs
Dimensions 1 x 1 x 1 in
Pre-assembled

Yes – Assembled, No – Kit Form, PCB Only

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