AD637BR

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Analog Devices' AD637BR is a precision, low power, true rms-to-dc converter.
• Characteristics:
  • High accuracy and linearity
  • Wide dynamic range
  • Low power consumption
  • Small package size
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The AD637BR is designed to accurately measure the root mean square (rms) value of complex input waveforms.
• Packaging/Quantity: The AD637BR is typically sold in reels of 250 units.

Specifications

• Supply Voltage Range: ±2.5V to ±18V
• Input Frequency Range: DC to 500kHz
• Input Signal Range: 100mVrms to 3Vrms
• Output Voltage Range: 0V to VCC
• Temperature Range: -40°C to +85°C
• Total Harmonic Distortion: <0.1% (typical)

Detailed Pin Configuration

The AD637BR has a total of 16 pins. Here is the detailed pin configuration:

1. INHI: High-level input
2. INLO: Low-level input
3. GND: Ground
4. VREF: Reference voltage output
5. VPOS: Positive supply voltage
6. VNEG: Negative supply voltage
7. VOUT: Output voltage
8. NC: No connection
9. NC: No connection
10. NC: No connection
11. NC: No connection
12. NC: No connection
13. NC: No connection
14. NC: No connection
15. NC: No connection
16. NC: No connection

Functional Features

• Accurate RMS-to-DC Conversion: The AD637BR provides precise conversion of rms values of complex waveforms to a proportional dc voltage.
• Wide Dynamic Range: It can accurately measure signals with frequencies ranging from DC to 500kHz.
• Low Power Consumption: The AD637BR operates on low power, making it suitable for battery-powered applications.
• High Accuracy and Linearity: It offers high accuracy and linearity over the entire input frequency range.

Advantages and Disadvantages

Advantages: - High accuracy and linearity - Wide dynamic range - Low power consumption - Small package size

Disadvantages: - Limited input signal range (100mVrms to 3Vrms) - Requires external supply voltages

Working Principles

The AD637BR utilizes a proprietary architecture that employs a precision multiplier and an rms-to-dc converter. It measures the true rms value of an input waveform by multiplying it with a precise reference voltage and then converting it into a proportional dc voltage.

Detailed Application Field Plans

The AD637BR finds applications in various fields, including: 1. Power Monitoring: It is used in power meters and energy monitoring systems to accurately measure the rms values of AC power signals. 2. Audio Equipment: The AD637BR is employed in audio amplifiers and mixers to measure the rms values of audio signals. 3. Industrial Automation: It is utilized in industrial control systems to monitor and measure AC waveforms accurately.

Detailed and Complete Alternative Models

Some alternative models to the AD637BR include: - AD736: True RMS-to-DC Converter - AD8436: Precision, Low Power, True RMS-to-DC Converter - AD8437: Precision, Low Power, True RMS-to-DC Converter with Analog Output

These alternative models offer similar functionality and characteristics to the AD637BR and can be considered as alternatives based on specific application requirements.

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