AD628ARZ

Product Overview

• Category: Integrated Circuit (IC)
• Use: Instrumentation Amplifier
• Characteristics: High precision, low noise, high common-mode rejection ratio (CMRR)
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Analog Devices' AD628ARZ is a precision instrumentation amplifier designed for accurate signal amplification in various applications.
• Packaging/Quantity: The AD628ARZ comes in a standard SOIC package and is typically sold in reels of 250 units.

Specifications

• Supply Voltage: ±2.25V to ±18V
• Input Offset Voltage: ±0.5mV maximum
• Input Bias Current: ±1nA maximum
• Gain Bandwidth Product: 800kHz typical
• Common-Mode Rejection Ratio (CMRR): 120dB minimum
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AD628ARZ has a total of 8 pins arranged as follows:

```

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| | --| IN+ V+ |-- --| IN- REF |-- --| RG OUT |-- --| GND V- |-- |___________| ```

1. IN+: Non-inverting input
2. IN-: Inverting input
3. RG: Gain setting resistor
4. REF: Reference voltage input
5. OUT: Amplified output
6. GND: Ground
7. V+: Positive power supply
8. V-: Negative power supply

Functional Features

• High precision amplification of differential signals
• Excellent rejection of common-mode noise
• Low noise and distortion
• Wide operating voltage range
• Flexible gain configuration using external resistor

Advantages and Disadvantages

Advantages: - High accuracy and precision - Low noise performance - Wide operating temperature range - Excellent common-mode rejection ratio

Disadvantages: - Requires external gain setting resistor - Limited bandwidth compared to some other instrumentation amplifiers

Working Principles

The AD628ARZ is based on the principle of an instrumentation amplifier, which amplifies the difference between two input signals while rejecting any common-mode noise. It consists of multiple operational amplifiers and precision resistors that provide high gain and accurate signal amplification.

Detailed Application Field Plans

The AD628ARZ finds applications in various fields, including:

1. Medical equipment: Used for amplifying bioelectric signals in ECG (Electrocardiogram) machines.
2. Industrial automation: Used for signal conditioning in control systems and data acquisition.
3. Test and measurement: Used for accurate signal amplification in laboratory instruments.
4. Communication systems: Used for amplifying weak signals in radio frequency (RF) receivers.

Detailed and Complete Alternative Models

Some alternative models to the AD628ARZ include:

1. INA128P: Instrumentation amplifier with similar specifications from Texas Instruments.
2. LT1167: Precision instrumentation amplifier from Linear Technology.
3. MAX4209: Low-noise, low-drift instrumentation amplifier from Maxim Integrated.

These alternative models offer similar functionality and can be considered as substitutes depending on specific requirements.

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