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AD627BNZ Instrumentation Amplifier: Features, Applications

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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.

 

CAD Models

Figure-AD627BNZ-PCB-Symbol

 

Figure: PCB Symbol

 

Figure-AD627BNZ-PCB-Footprint

 

Figure: Footprint

 

Figure-AD627BNZ-3D-Model

 

Figure: 3D Model

 

Pin Configuration

Figure-AD627BNZ-Pin-Configuration

 

Figure: Pin Configuration

 

Block Diagram

Figure-AD627BNZ-Block-Diagram

 

Figure: 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

 

Specifications

Product Attribute Attribute Value
Manufacturer: Analog Devices Inc.
Product Category: Instrumentation Amplifiers
Series: AD627
Number of Channels: 1 Channel
3 dB Bandwidth: 80 kHz
SR - Slew Rate: 50 mV/us
CMRR - Common Mode Rejection Ratio: 83 dB
Ib - Input Bias Current: 10 nA
Vos - Input Offset Voltage: 25 uV
Supply Voltage - Max: 36 V
Supply Voltage - Min: 2.2 V
Operating Supply Current: 85 uA
Minimum Operating Temperature: - 40 C
Maximum Operating Temperature: + 85 C
Mounting Style: Through Hole
Package / Case: PDIP-8
Packaging: Tube
Amplifier Type: Instrumentation Amplifier
Brand: Analog Devices
Dual Supply Voltage: 1.1 V to 18 V
Gain V/V: 5 V/V to 1000 V/V
Height: 3.3 mm
Length: 9.27 mm
Maximum Input Resistance: 20 GOhms
Operating Supply Voltage: 2.2 V to 36 V
Pd - Power Dissipation: 1.3 W
Product: Instrumentation Amplifiers
Product Type: Instrumentation Amplifiers
PSRR - Power Supply Rejection Ratio: 125 dB
Factory Pack Quantity: 50
Subcategory: Amplifier ICs
Supply Type: Single, Dual
Vcm - Common Mode Voltage: 2.2 V to 36 V
Voltage Gain dB: 60 dB
Width: 6.35 mm
Unit Weight: 0.018695 oz

 

Manufacturer

Analog Devices, Inc. (ADI), also known simply as Analog, is an American multinational semiconductor company specializing in data conversion, signal processing and power management technology, headquartered in Wilmington, Massachusetts.

 

Using Warning

Note: Please check their parameters and pin configuration before replacing them in your circuit.

 

FAQ

What is an instrumentation amplifier used for?

An instrumentation amplifier (IA) is used to provide a large amount of gain for very low-level signals, often in the presence of high noise levels. The major properties of IAs are high gain, large common-mode rejection ratio (CMRR), and very high input impedance.

 

What is instrumentation amplifier characteristics?

Features include very low DC offset, low drift, low noise, very high open-loop gain, very large common-mode rejection ratio, and high input impedance. Instrumentation amplifiers are used in circuits that require very high accuracy and stability.

 

What is the output of instrumentation amplifier?

The output impedance of the instrumentation amplifier is the output impedance of the difference amplifier, which is very low. The CMRR of the op-amp 3 is very high and almost all of the common mode signal will be rejected.

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