General Description

The MX536A and MX636 are true RMS-to-DC convert-

ers. They feature low power and are designed to accept

complex input waveforms containing AC and DC com-

ponents. They can be operated from either a single sup-

ply or dual supplies. Both devices draw less than 1mA

of quiescent supply current, making them ideal for bat-

tery-powered applications.

Input and output offset, positive and negative waveform

symmetry (DC reversal), and full-scale accuracy are

laser trimmed, so that no external trims are required to

achieve full rated accuracy.

________________________Applications

Digital Multimeters

Battery-Powered Instruments

Panel Meters

Process Control

____________________________Features

o True RMS-to-DC Conversion

o Computes RMS of AC and DC Signals

o Wide Response:

o Auxiliary dB Output: 60dB Range (MX536A)

50dB Range (MX636)

o Single- or Dual-Supply Operation

o Low Power: 1.2mA typ (MX536A)

800µA typ (MX636)

True RMS-to-DC Converters

________________________________________________________________

Maxim Integrated Products

1

14

13

12

11

10

9

8

1

2

3

4

5

6

7

N.C.

N.C.

N.C.

COMMON

N.C.

dB

BUF OUT

BUF IN

MX536A

MX636

DIP

TOP VIEW

MX536A

MX636B

TO-100

8

9

10

1

2

3

4

5

6

7

BUF IN

BUF OUT

dB

COMMON

Pin Configurations

14

13

12

11

10

9

8

1

2

3

4

5

6

7

ABSOLUTE

VALUE

SQUARER

DIVIDER

CURRENT

MIRROR

BUF

_________Typical Operating Circuits

19-0824; Rev 2; 3/96

PART

MX536AJC/D

MX536AJCWE

MX536AJD

0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

Dice**

16 Wide SO

14 Ceramic

Ordering Information

Ordering Information continued at end of data sheet.

*

Maxim reserves the right to ship ceramic packages in lieu of

CERDIP packages.

**

MX536AJH

MX536AJN

0°C to +70°C

0°C to +70°C

10 TO-100

14 Plastic DIP

MX536AJQ*

MX536AKCWE

0°C to +70°C

0°C to +70°C

14 CERDIP

16 Wide SO

MX536AKD

MX536AKH

0°C to +70°C

0°C to +70°C

14 Ceramic

10 TO-100

MX536AKN

0°C to +70°C

14 Plastic DIP

Pin Configurations continued at end of data sheet.

Typical Operating Circuits continued at end of data sheet.

MX536AKQ*

0°C to +70°C

14 CERDIP

MX536ASD

-55°C to +125°C

14 Ceramic

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.