AD637KRZ

Product Overview

• Category: Integrated Circuit
• Use: Analog Devices' AD637KRZ is a high precision, low power RMS-to-DC converter designed for use in various applications.
• Characteristics:
  • High accuracy
  • Low power consumption
  • Wide input voltage range
  • Small package size
• Package: AD637KRZ is available in a small outline package (SOIC) with 8 pins.
• Essence: The AD637KRZ is an essential component in measuring the root mean square (RMS) value of an AC signal and converting it into a DC voltage.
• Packaging/Quantity: The AD637KRZ is typically sold in reels containing 250 units.

Specifications

• Input Voltage Range: ±10V to ±20V
• Output Voltage Range: 0V to Vref
• Supply Voltage: ±5V to ±18V
• Operating Temperature Range: -40°C to +85°C
• Accuracy: ±0.2% of reading
• Bandwidth: 400kHz
• Power Consumption: 1.5mW

Pin Configuration

The AD637KRZ has the following pin configuration:

```

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| | --| V+ Vref |-- Pin 1 --| Vin+ Vin- |-- Pin 2 --| Vout |-- Pin 3 --| Gnd |-- Pin 4 --| NC |-- Pin 5 --| NC |-- Pin 6 --| NC |-- Pin 7 --| V- |-- Pin 8 |___________| ```

Functional Features

• High accuracy RMS-to-DC conversion
• True RMS measurement of AC signals
• Linear response over a wide frequency range
• Low power consumption
• Excellent temperature stability
• Low input bias current

Advantages and Disadvantages

Advantages: - High accuracy measurement of RMS values - Wide input voltage range - Low power consumption - Small package size

Disadvantages: - Limited bandwidth compared to some other models - Requires external reference voltage for operation

Working Principles

The AD637KRZ utilizes a precision rectifier and an analog multiplier to measure the RMS value of an AC signal. The input signal is first rectified, then multiplied by a constant factor to obtain the RMS value. The output voltage is proportional to the RMS value of the input signal.

Application Field Plans

The AD637KRZ can be used in various applications, including: - Power quality monitoring - Audio equipment - Instrumentation and measurement systems - Industrial automation - Communication systems

Alternative Models

• AD736: Similar functionality with lower accuracy
• AD8436: Higher accuracy and wider bandwidth
• AD8421: Lower power consumption and smaller package size

These alternative models offer different trade-offs in terms of accuracy, bandwidth, power consumption, and package size, allowing users to choose the most suitable option for their specific requirements.

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