Datasheet AD624 (Analog Devices)

a
Precision Instrumentation Amplifier AD624 FEATURES FUNCTIONAL BLOCK DIAGRAM Low Noise: 0.2
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V p-p 0.1 Hz to 10 Hz Low Gain TC: 5 ppm max (G = 1) 50
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Low Nonlinearity: 0.001% max (G = 1 to 200) –INPUT High CMRR: 130 dB min (G = 500 to 1000) G = 100 AD624 Low Input Offset Voltage: 25
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V, max 225.3
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Low Input Offset Voltage Drift: 0.25
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V/
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C max G = 200 4445.7
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Gain Bandwidth Product: 25 MHz 124
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VB 10k
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G = 500 Pin Programmable Gains of 1, 100, 200, 500, 1000 SENSE 80.2
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No External Components Required 20k
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10k
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RG1 OUTPUT Internally Compensated 20k
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10k
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RG2 10k
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REF 50
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+INPUT PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS
The AD624 is a high precision, low noise, instrumentation 1. The AD624 offers outstanding noise performance. Input amplifier designed primarily for use with low level transducers, noise is typically less than 4 nV/√Hz at 1 kHz. including load cells, strain gauges and pressure transducers. An 2. The AD624 is a functionally complete instrumentation am- outstanding combination of low noise, high gain accuracy, low plifier. Pin programmable gains of 1, 100, 200, 500 and 1000 gain temperature coefficient and high linearity make the AD624 are provided on the chip. Other gains are achieved through ideal for use in high resolution data acquisition systems. the use of a single external resistor. The AD624C has an input offset voltage drift of less than 3. The offset voltage, offset voltage drift, gain accuracy and gain 0.25 µV/°C, output offset voltage drift of less than 10 µV/°C, temperature coefficients are guaranteed for all pretrimmed CMRR above 80 dB at unity gain (130 dB at G = 500) and a gains. maximum nonlinearity of 0.001% at G = 1. In addition to these outstanding dc specifications, the AD624 exhibits superior ac 4. The AD624 provides totally independent input and output performance as well. A 25 MHz gain bandwidth product, 5 V/µs offset nulling terminals for high precision applications. slew rate and 15 µs settling time permit the use of the AD624 in This minimizes the effect of offset voltage in gain ranging high speed data acquisition applications. applications. The AD624 does not need any external components for pre- 5. A sense terminal is provided to enable the user to minimize trimmed gains of 1, 100, 200, 500 and 1000. Additional gains the errors induced through long leads. A reference terminal is such as 250 and 333 can be programmed within one percent also provided to permit level shifting at the output. 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. REV. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties
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