MX536A 반도체 회로 부품 판매점
True RMS-to-DC Converters
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 Maxim Integrated Products |
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 7VRMS for the MX536A
and 0 to 200mVRMS 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
IOUT
10
RL 1
9 BUF IN
COMMON 2
+VS 3
MX536A
MX636B
8 BUF OUT
7 dB
VIN 4 5 6
-VS
TO-100
CAV
____________________________Features
o True RMS-to-DC Conversion
o Computes RMS of AC and DC Signals
o Wide Response:
2MHz Bandwidth for VRMS > 1V (MX536A)
1MHz Bandwidth for VRMS > 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 TA = +25°C.
_________Typical Operating Circuits
CAV
VIN 1
N.C. 2
-VS 3
CAV 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 RL
8 IOUT
DIP
Pin Configurations continued at end of data sheet.
VIN
1
ABSOLUTE
14
+VS
VALUE
2 13
-VS
3
SQUARER
DIVIDER
12
4 11
5
CURRENT
MIRROR
10
VOUT 6
9
7 BUF
8
Typical Operating Circuits continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.
True RMS-to-DC Converters
ABSOLUTE MAXIMUM RATINGS
Supply Voltage: Dual Supplies (MX536A) ............................±18V
(MX636) .............................±12V
Single Supply (MX536A) ...........................+36V
(MX636) .............................+24V
Input Voltage (MX536A).......................................................±25V
(MX636) .........................................................±12V
Power Dissipation (Package)
Plastic DIP (derate 12mW/°C above +75°C) ...............450mW
Small Outline (derate 10mW/°C above +75°C)............400mW
Ceramic (derate 10mW/°C above +75°C) ...................500mW
TO-100 metal can (derate 7mW/°C above +75°C) ......450mW
Output Short-Circuit Duration ........................................Indefinite
Operating Temperature Ranges
Commercial (J, K) ...............................................0°C to +70°C
Military (S) ......................................................-55°C to +125°C
Storage Temperature Range .............................-55°C to +150°C
Lead Temperature (soldering, 10sec)................................300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—MX536A
(TA = +25°C, +VS = +15V, -VS = -15V, unless otherwise noted.)
PARAMETER
CONDITIONS
Transfer Equation
Averaging Time Constant
Figure 3
CONVERSION ACCURACY
MX536AJ, AS
Total Error, Internal Trim (Note 1)
MX536AK
MX536AJ
Total Error vs. Temperature
TMIN to +70°C
MX536AK
MX536AS
+70°C to +125°C
MX536AS
Total Error vs. Supply
Total Error vs. DC Reversal
MX536AJ, AS
MX536AK
Total Error, External Trim
(Note 1)
MX536AJ, AS
MX536AK
ERROR vs. CREST FACTOR (Note 2)
Crest Factor 1 to 2
Additional Error
Crest Factor = 3
Crest Factor = 7
FREQUENCY RESPONSE (Note 3)
Bandwidth for 1%
Additional Error (0.09dB)
VIN = 10mV
VIN = 100mV
VIN = 1V
VIN = 10mV
±3dB Bandwidth
VIN = 100mV
VIN = 1V
MIN TYP MAX
VOUT = [avg. (VIN)2] 1/2
25
UNITS
ms/µF CAV
±5 ±0.5
±2 ±0.2
±0.1 ±0.01
±0.05 ±0.005
±0.1 ±0.005
±0.03 ±0.005
±0.1 ±0.01
±0.2
±0.1
±3 ±0.3
±2 ±0.1
mV ±% of
Reading
mV ±% of
Reading/°C
mV ±% of
Reading/V
% of
Reading
mV ±% of
Reading
Specified Accuracy
-0.1
-1.0
% of
Reading
5
45 kHz
120
90
kHz
450
2.3 MHz
2 _______________________________________________________________________________________
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MX536A converter
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