5962-8980501IA Analog Devices, 5962-8980501IA Datasheet

5962-8980501IA

Manufacturer Part Number

5962-8980501IA

Description

Manufacturer

Analog Devices

Datasheets

1.5962-8980501IA.pdf (16 pages)

2.5962-8980501IA.pdf (16 pages)

Specifications of 5962-8980501IA

Case

TO-100-10

Date_code

06+

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BOSTOCK HK LIMITED

Part Number:

5962-8980501IA

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ADI

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FEATURES

True rms-to-dc conversion

Laser trimmed to high accuracy

Wide response capability

dB output with 60 dB range

Low power: 1.2 mA quiescent current

Single or dual supply operation

Monolithic integrated circuit

−55°C to +125°C operation (AD536AS)

GENERAL DESCRIPTION

The AD536A is a complete monolithic integrated circuit that

performs true rms-to-dc conversion. It offers performance

comparable or superior to that of hybrid or modular units

costing much more. The AD536A directly computes the true

rms value of any complex input waveform containing ac and dc

components. A crest factor compensation scheme allows

measurements with 1% error at crest factors up to 7. The wide

bandwidth of the device extends the measurement capability to

300 kHz with less than 3 dB errors, for signal levels greater than

100 mV.

An important feature of the AD536A, not previously available

in rms converters, is an auxiliary dB output pin. The logarithm

of the rms output signal is brought out to a separate pin to allow

the dB conversion, with a useful dynamic range of 60 dB. Using

an externally supplied reference current, the 0 dB level can be

conveniently set to correspond to any input level from 0.1 V to

2 V rms.

The AD536A is laser trimmed to minimize input and output

offset voltage, to optimize positive and negative waveform

symmetry (dc reversal error), and for full-scale accuracy at

7 V rms. As a result, no external trims are required to achieve

the rated unit accuracy.

The input and output pins are fully protected. The input

circuitry can take overload voltages well beyond the supply

levels. Loss of supply voltage with the input connected to

external circuitry does not cause the device to fail. The output is

short-circuit protected.

Rev. C

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

0.2% maximum error (AD536AK)

0.5% maximum error (AD536AJ)

Computes rms of ac and dc signals

450 kHz bandwidth: V rms > 100 mV

2 MHz bandwidth: V rms > 1 V

Signal crest factor of 7 for 1% error

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The AD536A is available in two accuracy grades (J and K) for

commercial temperature range (0°C to 70°C) applications, and

one grade (S) rated for the −55°C to +125°C extended range.

The AD536AK offers a maximum total error of ±2 mV ± 0.2%

of reading while the AD536AJ and AD536AS have maximum

errors of ±5 mV ± 0.5% of reading. All three versions are

available in a hermetically sealed 14-lead DIP or a 10-lead

TO-100 metal can. The AD536AS is also available in a

20-terminal leadless hermetically sealed ceramic chip carrier.

The AD536A computes the true root-mean-square level of a

complex ac (or ac plus dc) input signal and provides an equiva-

lent dc output level. The true rms value of a waveform is a more

useful quantity than the average rectified value because it relates

directly to the power of the signal. The rms value of a statistical

signal also relates to its standard deviation.

An external capacitor is required to perform measurements to

the fully specified accuracy. The value of this capacitor deter-

mines the low frequency ac accuracy, ripple amplitude, and

settling time.

The AD536A operates equally well from split supplies or a

single supply with total supply levels from 5 V to 36 V. With

one milliampere quiescent supply current, the device is well

suited for a wide variety of remote controllers and battery-

powered instruments.

BUF IN

True RMS-to-DC Converter

FUNCTIONAL BLOCK DIAGRAM

ABSOLUTE

AD536A

VALUE

Integrated Circuit

Figure 1.

25kΩ

SQUARER

CURRENT

DIVIDER

MIRROR

25kΩ

AD536A

www.analog.com

BUF

OUT

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