Datasheet
REV. B
AD536A
–3–
ABSOLUTE MAXIMUM RATINGS
1
Supply Voltage
Dual Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V
Single Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +36 V
Internal Power Dissipation
2
. . . . . . . . . . . . . . . . . . . . 500 mW
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
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
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.
2
10-Pin Header: θ
JA
= 150°C/W; 20-Leadless LCC: θ
JA
= 95°C/W; 14-Lead Size
Brazed Ceramic DIP: θ
JA
= 95°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
capacitor, C
AV
, as shown in Figure 5. Thus, if a 4 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.
V
IN
+V
S
–V
S
V
OUT
C
AV
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
V
IN
–V
S
C
AV
+V
S
V
OUT
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
V
IN
+V
S
–V
S
V
OUT
C
AV
dB
Figure 1. Standard RMS Connection