Analog Devices Inc.
Obrázek může být reprezentace.
Viz Specifikace pro podrobnosti o produktu.
AD8421BRZ-R7
Zobrazit detail DataSheets

AD8421BRZ-R7

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Amplifier
  • Characteristics: High precision, low noise, wide bandwidth
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: Instrumentation amplifier
  • Packaging/Quantity: Tape and Reel / 2500 units per reel

Specifications

  • Supply Voltage Range: ±2.25V to ±18V
  • Input Offset Voltage: 50μV maximum
  • Gain Bandwidth Product: 10MHz
  • Input Bias Current: 20nA maximum
  • Common Mode Rejection Ratio: 100dB minimum
  • Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AD8421BRZ-R7 has the following pin configuration:

  1. IN1: Non-inverting input
  2. IN2: Inverting input
  3. REF: Reference voltage input
  4. V+: Positive power supply
  5. OUT: Output
  6. V-: Negative power supply
  7. RG: Gain setting resistor
  8. NC: No connection

Functional Features

  • High precision amplification of differential signals
  • Low noise performance for accurate signal processing
  • Wide bandwidth allows for amplification of high-frequency signals
  • Excellent common mode rejection ratio for rejecting common mode noise
  • Flexible gain setting with external resistor (RG)

Advantages and Disadvantages

Advantages: - High precision amplification for accurate measurements - Low noise performance ensures signal integrity - Wide bandwidth enables amplification of various frequency ranges - Excellent common mode rejection ratio reduces interference - Flexible gain setting allows customization for different applications

Disadvantages: - Requires external gain setting resistor for operation - Limited operating temperature range (-40°C to +85°C)

Working Principles

The AD8421BRZ-R7 is an instrumentation amplifier designed to amplify small differential signals with high precision. It consists of three operational amplifiers configured in a differential amplifier topology. The input signals are applied to the non-inverting (IN1) and inverting (IN2) inputs, while the reference voltage (REF) sets the common mode level.

The amplified output signal is available at the OUT pin. The gain of the amplifier can be set by connecting an external resistor (RG) between the RG pin and the REF pin. This allows for flexibility in adjusting the amplification factor according to the specific application requirements.

Detailed Application Field Plans

The AD8421BRZ-R7 is commonly used in various applications that require accurate amplification of small differential signals. Some of the typical application fields include:

  1. Biomedical Instrumentation: Used in medical devices such as ECG (Electrocardiogram) machines and EEG (Electroencephalogram) equipment for precise signal amplification.
  2. Industrial Automation: Employed in industrial control systems for amplifying sensor signals, ensuring accurate measurement and control.
  3. Test and Measurement Equipment: Integrated into test and measurement instruments like oscilloscopes and data acquisition systems to enhance signal fidelity.
  4. Audio Systems: Utilized in high-fidelity audio amplifiers to achieve low distortion and high-quality sound reproduction.

Detailed and Complete Alternative Models

  • AD8221: Single-supply instrumentation amplifier with similar specifications
  • INA128: Precision instrumentation amplifier with wide supply voltage range
  • LT1167: Low power, high precision instrumentation amplifier
  • MCP6N11: Programmable gain instrumentation amplifier with low noise performance

(Note: This list is not exhaustive and there are several other alternative models available in the market.)

Word count: 409 words

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací AD8421BRZ-R7 v technických řešeních

Sure! Here are 10 common questions and answers related to the application of AD8421BRZ-R7 in technical solutions:

Q1: What is the AD8421BRZ-R7? A1: The AD8421BRZ-R7 is a precision, low power, low noise instrumentation amplifier designed for applications that require high accuracy and excellent long-term stability.

Q2: What is the input voltage range of the AD8421BRZ-R7? A2: The AD8421BRZ-R7 has a wide input voltage range of ±10V, allowing it to handle a variety of signal levels.

Q3: What is the gain range of the AD8421BRZ-R7? A3: The AD8421BRZ-R7 has a gain range from 1 to 1000, providing flexibility in amplifying different signal levels.

Q4: What is the bandwidth of the AD8421BRZ-R7? A4: The AD8421BRZ-R7 has a bandwidth of 1 MHz, making it suitable for a wide range of applications.

Q5: Does the AD8421BRZ-R7 have built-in protection features? A5: Yes, the AD8421BRZ-R7 includes built-in overvoltage and reverse polarity protection, ensuring the safety of the device and the connected circuitry.

Q6: Can the AD8421BRZ-R7 operate with a single power supply? A6: Yes, the AD8421BRZ-R7 can operate with a single power supply ranging from 2.7V to 36V, making it compatible with various power sources.

Q7: Is the AD8421BRZ-R7 suitable for low-power applications? A7: Yes, the AD8421BRZ-R7 is designed for low-power operation, consuming only 1.3 mA of current.

Q8: Does the AD8421BRZ-R7 have a temperature sensor? A8: No, the AD8421BRZ-R7 does not have an integrated temperature sensor. However, it has excellent long-term stability over a wide temperature range.

Q9: Can the AD8421BRZ-R7 be used in precision measurement applications? A9: Yes, the AD8421BRZ-R7 is well-suited for precision measurement applications due to its high accuracy and low noise performance.

Q10: What are some typical applications of the AD8421BRZ-R7? A10: The AD8421BRZ-R7 can be used in various applications such as medical instrumentation, industrial process control, data acquisition systems, and strain gauge amplification.

Please note that these answers are general and may vary depending on specific requirements and use cases.