REV. B

AD536A

–3–

ABSOLUTE MAXIMUM RATINGS

1

Supply Voltage

Dual Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±18 V

Single Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +36 V

Internal Power Dissipation

Maximum Input Voltage . . . . . . . . . . . . . . . . . . . .

±25 V Peak

Buffer Maximum Input Voltage . . . . . . . . . . . . . . . . . . . . .

±V

S

Maximum Input Voltage . . . . . . . . . . . . . . . . . . . .

±25 V Peak

Storage Temperature Range . . . . . . . . . . . . –55

°C to +150°C

Operating Temperature Range

AD536AJ/K . . . . . . . . . . . . . . . . . . . . . . . . . . 0

°C to +70°C

AD536AS . . . . . . . . . . . . . . . . . . . . . . . . –55

°C to +125°C

Lead Temperature Range

(Soldering 60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +300

°C

ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 V

NOTES

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those indicated in the operational

section of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

θ

°C/W; 20-Leadless LCC: θ

°C/W; 14-Lead Size

Brazed Ceramic DIP:

θ

°C/W.

CHIP DIMENSIONS AND PAD LAYOUT

Dimensions shown in inches and (mm).

ORDERING GUIDE

Temperature

Package

Package

Model

Range

Description

Option

AD536AJD

0

°C to +70°C

Side Brazed Ceramic DIP

D-14

AD536AKD

0

°C to +70°C

Side Brazed Ceramic DIP

D-14

AD536AJH

0

°C to +70°C

Header

H-10A

AD536AKH

0

°C to +70°C

Header

H-10A

AD536AJQ

0

°C to +70°C

Cerdip

Q-14

AD536AKQ

0

°C to +70°C

Cerdip

Q-14

AD536ASD

–55

°C to +125°C

Side Brazed Ceramic DIP

D-14

AD536ASD/883B

–55

°C to +125°C

Side Brazed Ceramic DIP

D-14

AD536ASE/883B

–55

°C to +125°C

LCC

E-20A

AD536ASH

–55

°C to +125°C

Header

H-10A

AD536ASH/883B

–55

°C to +125°C

Header

H-10A

AD536AJCHIPS

0

°C to +70°CDie

AD536AKH/+

0

°C to +70°C

Header

H-10A

AD536ASCHIPS

–55

°C to +125°CDie

5962-89805012A

–55

°C to +125°C

LCC

E-20A

5962-8980501CA

–55

°C to +125°C

Side Brazed Ceramic DIP

D-14

5962-8980501IA

–55

°C to +125°C

Header

H-10A

STANDARD CONNECTION

The AD536A is simple to connect for the majority of high accu-

racy rms measurements, requiring only an external capacitor to

set the averaging time constant. The standard connection is

shown in Figure 1. In this configuration, the AD536A will mea-

sure the rms of the ac and dc level present at the input, but will

show an error for low frequency inputs as a function of the filter

µF capacitor

is used, the additional average error at 10 Hz will be 0.1%, at

3 Hz it will be 1%. The accuracy at higher frequencies will be

according to specification. If it is desired to reject the dc input, a

capacitor is added in series with the input, as shown in Figure 3,

the capacitor must be nonpolar. If the AD536A is driven with

power supplies with a considerable amount of high frequency

ripple, it is advisable to bypass both supplies to ground with

0.1

µF ceramic discs as near the device as possible.

BUF

25k

ABSOLUTE

VALUE

SQUARER

DIVIDER

CURRENT

MIRROR

25k

AD536A

14

13

12

11

10

9

8

1

2

3

4

5

6

7

ABSOLUTE

VALUE

CURRENT

MIRROR

25k

25k

BUF

SQUARER

DIVIDER

AD536A

4

5

6

7

8

3

2

1

20

19

18

17

16

15

14

9

10

11

12

13

BUF

CURRENT

MIRROR

ABSOLUTE

VALUE

SQUARER

DIVIDER

25k

25k

AD536A

dB

Figure 1. Standard RMS Connection