AD627BNZ Instrumentation Amplifier: Features, Applications [FAQ]

Description

The AD627 is an integrated, micropower instrumentation amplifier that delivers rail-to-rail output swing on single and dual (+2.2 V to ±18 V) supplies. The AD627 provides excellent ac and dc specifications while operating at only 85 μA maximum.
The AD627 offers superior flexibility by allowing the user to set the gain of the device with a single external resistor while conforming to the 8-lead industry-standard pinout configuration.
With no external resistor, the AD627 is configured for a gain of 5. With an external resistor, it can be set to a gain of up to 1000.
A wide supply voltage range (+2.2 V to ±18 V) and micropower current consumption make the AD627 a perfect fit for a wide range of applications. Single-supply operation, low power consumption, and rail-to-rail output swing make the AD627 ideal for battery-powered applications. Its rail-to-rail output stage maximizes dynamic range when operating from low supply voltages. Dual-supply operation (±15 V) and low power consumption make the AD627 ideal for industrial applications, including 4 to 20 mA loop-powered systems.
The AD627 does not compromise performance, unlike other micropower instrumentation amplifiers. Low voltage offset, offset drift, gain error, and gain drift minimize errors in the system. The AD627 also minimizes errors over frequency by providing excellent CMRR over frequency. Because the CMRR remains high up to 200 Hz, line noise and line harmonics are rejected. The AD627 provides superior performance, uses less circuit board area, and costs less than micropower discrete designs.

Pin Diagram

Block Diagram

Features

·Micropower, 85 μA maximum supply current
·Wide power supply range (+2.2 V to ±18 V)
·Easy to use
·Gain set with one external resistor
·Gain range 5 (no resistor) to 1000
·Higher performance than discrete designs
·Rail-to-rail output swing
·High accuracy dc performance
·0.03% typical gain accuracy (G = +5) (AD627A)
·10 ppm/°C typical gain drift (G = +5)
·125 μV maximum input offset voltage (AD627B dual supply)
·200 μV maximum input offset voltage (AD627A dual supply)
·1 μV/°C maximum input offset voltage drift (AD627B)
·3 μV/°C maximum input offset voltage drift (AD627A)
·10 nA maximum input bias current
·Noise: 38 nV/√Hz RTI noise @ 1 kHz (G = +100)
·Excellent ac specifications
·AD627A: 77 dB minimum CMRR (G = +5)
·AD627B: 83 dB minimum CMRR (G = +5)
·80 kHz bandwidth (G = +5)
·135 μs settling time to 0.01% (G = +5, 5 V step)

Applications

·4 to 20 mA loop-powered applications

• ·Low power medical instrumentation—ECG, EEG
• ·Transducer interfacing
• ·Thermocouple amplifiers
• ·Industrial process controls
• ·Low power data acquisition
• ·Portable battery-powered instruments

Datasheet

You can download the datasheet the link given below.

AD627BNZ-Datasheet

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