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AD624:  High Precision, Low Noise Instrumentation Amplifier

The AD624 is a high precision, low noise, instrumentation amplifier designed primarily for use with low level transducers, including load cells, strain gauges and pressure transducers. An combination of low noise, high gain accuracy, low gain temperature coefficient and high linearity make the AD624 ideal for use in high resolution data acquisition systems.

The AD624C has an input offset ...More

AD624:  High Precision, Low Noise Instrumentation Amplifier

Product Description

The AD624 is a high precision, low noise, instrumentation amplifier designed primarily for use with low level transducers, including load cells, strain gauges and pressure transducers. An combination of low noise, high gain accuracy, low gain temperature coefficient and high linearity make the AD624 ideal for use in high resolution data acquisition systems.

The AD624C has an input offset voltage drift of less than 0.25 µV/°C, output offset voltage drift of less than 10 µV/°C, CMRR above 80 dB at unity gain (130 dB at G = 500) and a maximum nonlinearity of 0.001% at G = 1. In addition to these outstanding dc specifications, the AD624 exhibits superior ac performance as well. A 25 MHz gain bandwidth product, 5 V/µs slew rate and 15 µs settling time permit the use of the AD624 in high speed data acquisition applications.

The AD624 does not need any external components for trimmed gains of 1, 100, 200, 500 and 1000. Additional gains such as 250 and 333 can be programmed within one percent accuracy with external jumpers. A single external resistor can also be used to set the 624's gain to any value in the range of 1 to 10,000.

RESOURCES & TOOLS

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  • Low Noise: 0.2 µV p-p 0.1 Hz to 10 Hz
  • Low Gain TC: 5 ppm max (G = 1)
  • Low Nonlinearity: 0.001% max (G = 1 to 200)
  • High CMRR: 130 dB min (G = 500 to 1000)
  • Pin Programmable Gains of
    1, 100, 200, 500, 1000
  • Low Input Offset Voltage: 25 µV, max
  • Low Input Offset Voltage Drift: 0.25 µV/°C max
  • Gain Bandwidth Product: 25 MHz
  • No External Components Required
  • Internally Compensated
  • Single/Dual Supply: Dual
  • Voltage Supply (Vmax) : ±18V
  • Gain Setting Method: Pin
  • Gain Range (min to max): 1000
  • Bandwidth G=10 (kHz typ): 150kHz
  • CMRR (dB): 90dB
  • Vnoise RTI 1-10 Hz µVp-p : 0.3µV p-p
  • Temperature Range: -55 to +125
  • Gain Error (%) max: ±0.05%
  • Supply Current : 5mA
  • Package: DIP
  • Vosi (µV): 200µV

Functional Block Diagram for AD624

AD624 Diagram
Functional Block Diagram for AD624

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