MX536A Datasheet, PDF (1/12 Pages) Maxim Integrated Products – True RMS-to-DC Converters

19-0824; Rev 2; 3/96
True RMS-to-DC Converters
General Description
The MX536A and MX636 are true RMS-to-DC convert-
ers. They feature low power and are designed to accept
low-level input signals from 0 to 7V_RMS for the MX536A
and 0 to 200mV_RMS for the MX636. Both devices 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
Pin Configurations
TOP VIEW
I_OUT
10
R_{L 1}
9 BUF IN
COMMON 2
+V_S 3
MX536A
MX636B
8 BUF OUT
7 dB
V_IN ⁴
5
6 C_AV
-V_S
TO-100
____________________________Features
o True RMS-to-DC Conversion
o Computes RMS of AC and DC Signals
o Wide Response:
2MHz Bandwidth for V_RMS > 1V (MX536A)
1MHz Bandwidth for V_RMS > 100mV (MX636)
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)
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MX536AJC/D
0°C to +70°C
Dice**
MX536AJCWE
0°C to +70°C
16 Wide SO
MX536AJD
0°C to +70°C
14 Ceramic
MX536AJH
0°C to +70°C
10 TO-100
MX536AJN
0°C to +70°C
14 Plastic DIP
MX536AJQ*
0°C to +70°C
14 CERDIP
MX536AKCWE
0°C to +70°C
16 Wide SO
MX536AKD
0°C to +70°C
14 Ceramic
MX536AKH
0°C to +70°C
10 TO-100
MX536AKN
0°C to +70°C
14 Plastic DIP
MX536AKQ*
0°C to +70°C
14 CERDIP
MX536ASD
-55°C to +125°C 14 Ceramic
Ordering Information continued at end of data sheet.
* Maxim reserves the right to ship ceramic packages in lieu of
CERDIP packages.
** Dice are specified at T_A = +25°C.
_________Typical Operating Circuits
C_AV
V_IN 1
N.C. 2
-V_S 3
C_AV 4
dB 5
BUF OUT 6
BUF IN 7
MX536A
MX636
14 ^+VS
13 ^N.C.
12 N.C.
11 N.C.
10 COMMON
9 R_L
8 I_OUT
DIP
Pin Configurations continued at end of data sheet.
V_IN
1
ABSOLUTE
14
+V_S
VALUE
2
13
-V_S
3
SQUARER
DIVIDER
12
4
11
5
CURRENT
MIRROR
10
V_OUT
6
9
7 ^BUF
8
Typical Operating Circuits continued at end of data sheet.
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