Mfr Part #:

AD637KR

Mfr Name: Analog Devices / Maxim Integrated

The Analog Devices AD637KR is a high-precision, wideband RMS-to-DC converter. It computes the true RMS value of complex waveforms with high accuracy and wide bandwidth.

✓ Total Stock: 4,700 pcs

$ Price Range: $0.75

AD637KR Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Components Technology Group, Inc. ✓ Non-Authorised Inventory information	4,700 pcs On Request	4700 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

AD637KR Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	RMS to DC Converters
Manufacturer Name	Analog Devices / Maxim Integrated
Current	2.2 mA
Mounting Type	Surface Mount
Supplier Device Package	16-SOIC
Supplier Package	16-SOIC
Voltage	±3 V / ±18 V

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AD637KR Description

Short technical summary and product information.

The AD637KR from Analog Devices is a complete, high-accuracy, RMS-to-DC converter designed to compute the true RMS value of any complex waveform. It offers performance comparable to discrete and modular techniques in accuracy, bandwidth, and dynamic range.

Key features include a maximum nonlinearity of 0.02% with a 0 V to 2 V rms input, and an additional error of 0.1% for a crest factor of 3. The device boasts a wide bandwidth, operating at 8 MHz at 2 V rms input and 600 kHz at 100 mV rms input. It can compute the true root mean square, mean square, or absolute value of AC or AC plus DC input waveforms, providing an equivalent DC output voltage.

The AD637KR also offers a direct dB output with a 60 dB range. A chip select/power-down feature allows for reduced quiescent current from 2.2 mA to 350 µA, making it suitable for low-power applications. When powered down, the output enters a high impedance state, enabling multiple AD637s to form a wideband true RMS multiplexer.

This component is available in a 16-SOIC package and is designed for surface mount applications. It operates with a supply voltage range of ±3.0V to ±18V and has a rated operating temperature range of 0°C to 70°C.

AD637KR Quick Information

Product Type: RMS to DC Converter

Canonical Name: AD637KR High Precision, Wideband RMS-to-DC Converter

Subcategory: Power Management (PMIC)

AD637KR Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

AD637KR Estimated Pricing

Qty	Low	High
1+	$0.75	$0.75

Estimated market price range - modelled values for guidance only, not live distributor offers.

AD637KR Features

High accuracy 0.02% maximum nonlinearity.
Wide bandwidth up to 8 MHz.
Computes true RMS, mean square, absolute value.
60 dB range dB output available.
Low power-down quiescent current of 350 µA.

AD637KR Applications

True RMS measurements of complex waveforms.
Power measurement and monitoring.
Signal processing applications.
Low power measurement systems.

AD637KR FAQs

7 frequently asked questions generated from this part’s specifications.

What is the supply voltage range for the AD637KR?

The AD637KR operates from ±3 V to ±18 V dual supplies.

What is the operating temperature range?

The operating temperature range is 0°C to 70°C.

What package is the AD637KR available in?

The AD637KR is available in a 16-SOIC surface-mount package (0.295", 7.50mm Width).

What is the nonlinearity specification?

The maximum nonlinearity is 0.02% from 0 V to 2 V rms input.

What is the bandwidth of the AD637KR?

Bandwidth is 8 MHz for input levels above 1 V rms and 600 kHz for inputs of 100 mV rms.

What is the typical quiescent current?

Typical quiescent current is 2.2 mA in normal operation, reducing to 350 µA in power-down mode.

What is the additional error for high crest factor signals?

The additional error is 0.1% for a crest factor of 3 at 1 V rms input.