19-0824; Rev 2; 3/96
Tru e RMS -t o -DC Co n ve rt e rs
5A/MX36
Ge n e ra l De s c rip t io n
The MX536A and MX636 are true RMS-to-DC convert-
ers. They feature low power and are designed to accept
____________________________Fe a t u re s
♦ True RMS-to-DC Conversion
♦ Computes RMS of AC and DC Signals
low-level input signals from 0 to 7V
for the MX536A
RMS
♦ Wide Response:
and 0 to 200mV
for the MX636. Both devices accept
RMS
2MHz Bandwidth for V
1MHz Bandwidth for V
> 1V (MX536A)
> 100mV (MX636)
RMS
RMS
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.
♦ Auxiliary dB Output: 60dB Range (MX536A)
50dB Range (MX636)
♦ Single- or Dual-Supply Operation
♦ Low Power: 1.2mA typ (MX536A)
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.
800µA typ (MX636)
Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-55°C to +125°C
PIN-PACKAGE
Dice**
MX536AJC/D
MX536AJCWE
MX536AJD
MX536AJH
MX536AJN
MX536AJQ*
MX536AKCWE
MX536AKD
MX536AKH
MX536AKN
MX536AKQ*
MX536ASD
________________________Ap p lic a t io n s
Digital Multimeters
16 Wide SO
14 Ceramic
10 TO-100
Battery-Powered Instruments
Panel Meters
14 Plastic DIP
14 CERDIP
16 Wide SO
14 Ceramic
10 TO-100
Process Control
P in Co n fig u ra t io n s
14 Plastic DIP
14 CERDIP
14 Ceramic
TOP VIEW
I
OUT
10
R
BUF IN
9
6
L
1
4
Ordering Information continued at end of data sheet.
* Maxim reserves the right to ship ceramic packages in lieu of
CERDIP packages.
BUF OUT
8
7
COMMON 2
3
MX536A
MX636B
** Dice are specified at T = +25°C.
A
+V
S
dB
C
AV
V
IN
_________Typ ic a l Op e ra t in g Circ u it s
5
-V
S
C
AV
TO-100
V
+V
V
IN
1
+V
S
IN
S
14
13
12
11
10
9
1
2
3
4
5
6
7
ABSOLUTE
VALUE
14
13
12
11
10
9
N.C.
N.C.
2
3
4
5
6
7
-V
S
N.C.
-V
S
SQUARER
DIVIDER
C
AV
N.C.
MX536A
MX636
dB
BUF OUT
BUF IN
COMMON
CURRENT
MIRROR
R
L
V
OUT
8
I
OUT
BUF
8
DIP
Pin Configurations continued at end of data sheet.
Typical Operating Circuits continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
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