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Электронный компонент: MX536ASD

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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
____________________________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)
800A typ (MX636)
MX536A/MX636
True RMS-to-DC Converters
________________________________________________________________
Maxim Integrated Products
1
14
13
12
11
10
9
8
1
2
3
4
5
6
7
+V
S
N.C.
N.C.
N.C.
COMMON
R
L
I
OUT
V
IN
N.C.
-V
S
C
AV
dB
BUF OUT
BUF IN
MX536A
MX636
DIP
TOP VIEW
MX536A
MX636B
TO-100
8
9
10
1
2
3
4
5
6
7
BUF IN
BUF OUT
dB
C
AV
-V
S
+V
S
I
OUT
R
L
COMMON
V
IN
Pin Configurations
14
13
12
11
10
9
8
1
2
3
4
5
6
7
ABSOLUTE
VALUE
SQUARER
DIVIDER
CURRENT
MIRROR
BUF
V
IN
-V
S
+V
S
V
OUT
C
AV
_________Typical Operating Circuits
19-0824; Rev 2; 3/96
PART
MX536A
JC/D
MX536AJCWE
MX536AJD
0C to +70C
0C to +70C
0C to +70C
TEMP. RANGE
PIN-PACKAGE
Dice**
16 Wide SO
14 Ceramic
Ordering Information
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
= +25C.
MX536AJH
MX536AJN
0C to +70C
0C to +70C
10 TO-100
14 Plastic DIP
MX536AJQ*
MX536AKCWE
0C to +70C
0C to +70C
14 CERDIP
16 Wide SO
MX536AKD
MX536AKH
0C to +70C
0C to +70C
14 Ceramic
10 TO-100
MX536AKN
0C to +70C
14 Plastic DIP
Pin Configurations continued at end of data sheet.
Typical Operating Circuits continued at end of data sheet.
MX536AKQ*
0C to +70C
14 CERDIP
MX536ASD
-55C to +125C
14 Ceramic
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.
MX536A/MX636
True RMS-to-DC Converters
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS--MX536A
(T
A
= +25C, +V
S
= +15V, -V
S
= -15V, unless otherwise noted.)
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.
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 +75C) ...............450mW
Small Outline (derate 10mW/C above +75C)............400mW
Ceramic (derate 10mW/C above +75C) ...................500mW
TO-100 metal can (derate 7mW/C above +75C) ......450mW
Output Short-Circuit Duration ........................................Indefinite
Operating Temperature Ranges
Commercial (J, K) ...............................................0C to +70C
Military (S) ......................................................-55C to +125C
Storage Temperature Range .............................-55C to +150C
Lead Temperature (soldering, 10sec)................................300C
MX536AJ, AS
T
MIN
to +70C
+70C to +125C
MHz
2.3
3dB Bandwidth
450
kHz
90
120
Bandwidth for 1%
Additional Error (0.09dB)
45
kHz
5
-1.0
Additional Error
-0.1
% of
Reading
Specified Accuracy
2 0.1
Total Error, External Trim
(Note 1)
mV % of
Reading
3 0.3
2 0.2
Total Error, Internal Trim (Note 1)
mV % of
Reading
5 0.5
V
OUT
= [avg. (V
IN
)
2
]
1
/
2
Transfer Equation
0.1
Total Error vs. DC Reversal
% of
Reading
0.2
mV % of
Reading/V
0.1 0.01
Total Error vs. Supply
Total Error vs. Temperature
mV % of
Reading/C
0.1 0.01
0.05 0.005
0.1 0.005
0.03 0.005
UNITS
MIN
TYP
MAX
PARAMETER
V
IN
= 1V
V
IN
= 100mV
V
IN
= 10mV
MX536AK
V
IN
= 1V
V
IN
= 100mV
MX536AJ, AS
V
IN
= 10mV
Crest Factor = 7
Crest Factor = 3
Crest Factor 1 to 2
MX536AJ
MX536AK
MX536AS
MX536AK
MX536AS
MX536AJ, AS
CONDITIONS
MX536AK
Figure 3
ms/F C
AV
25
Averaging Time Constant
CONVERSION ACCURACY
ERROR vs. CREST FACTOR
(Note 2)
FREQUENCY RESPONSE
(Note 3)
MX536A/MX636
True RMS-to-DC Converters
_______________________________________________________________________________________
3
UNITS
MIN
TYP
MAX
CONDITIONS
PARAMETER
V
RMS
0 to 7
15V Supplies
Continuous RMS Peak Transient
20
V
PK
0 to 2
V
RMS
Input Signal Range
5V Supplies
Continuous RMS Peak Transient
7
V
PK
Safe Input
All Supplies
25
V
PK
Input Resistance
13.33
16.7
20.00
k
MX536AJ, AS
0.8
2
mV
Input Offset Voltage
MX536AK
0.5
1
MX536AJ
1
2
MX536AK
0.5
1
T
A
= +25C
MX536AS
2
mV
MX536AJ, AK
0.1
T
A
= T
MIN
to T
MAX
MX536AS
0.2
mV/C
MX536AJ, AK
0.1
Offset Voltage
Supply Voltage
MX536AS
0.2
mV/V
15V Supplies
0 to 11
12.5
Output Voltage Swing
5V Supplies
0 to 2
V
Source
5
mA
Output Current
Sink
-130
A
Short Circuit Current
20
mA
Output Resistance
0.5
MX536AJ
0.4
0.6
dB
MX536AK
0.2
0.3
Error
V
IN
= 7mV to 7V
RMS
,
0dB = 1V
RMS
MX536AS
0.5
0.6
Scale Factor
-3
mV/dB
Scale Factor TC (Uncompensated)
0.33
% of
Reading/C
ELECTRICAL CHARACTERISTICS--MX536A (continued)
(T
A
= +25C, +V
S
= +15V, -V
S
= -15V, unless otherwise noted.)
I
REF
0dB = 1V
RMS
5
20
80
A
I
REF
Range
1
100
A
I
OUT
Scale Factor
40
A/V
RMS
I
OUT
Scale Factor Tolerance
10
20
%
Output Resistance
20
25
30
k
Voltage Compliance
-V
S
to
(+V
S
- 2.5)
V
INPUT CHARACTERISTICS
OUTPUT CHARACTERISTICS
dB OUTPUT
I
OUT
TERMINAL
MX536A/MX636
True RMS-to-DC Converters
4
_______________________________________________________________________________________
Input Bias Current
20
300
nA
Input Resistance
10
8
Output Current
Source
+5
mA
Sink
-130
A
Short-Circuit Current
20
mA
UNITS
MIN
TYP
MAX
CONDITIONS
PARAMETER
Input and Output Voltage Range
-V
S
to
(+V
S
- 2.5)
V
Input Offset Voltage
R
S
= 25k
Small-Signal Bandwidth
0.5
4
mV
1
MHz
Slew Rate (Note 4)
5
V/s
ELECTRICAL CHARACTERISTICS--MX536A (continued)
(T
A
= +25C, +V
S
= +15V, -V
S
= -15V, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS--MX636
(T
A
= +25C, +V
S
= +3V, -V
S
= -5V, unless otherwise noted.)
V
IN
= 200mV
MHz
1.5
V
IN
= 200mV
3dB Bandwidth
900
V
IN
= 100mV
kHz
100
V
IN
= 10mV
130
MX636K
Bandwidth for 1%
Additional Error (0.09dB)
90
V
IN
= 200mV
kHz
14
V
IN
= 100mV
MX636J
-0.5
V
IN
= 10mV
Additional Error
-0.2
% of
Reading
Specified Accuracy
Crest Factor = 6
0.1 0.1
Crest Factor = 3
Total Error, External Trim
(Note 5)
mV % of
Reading
0.3 0.1
MX636K
0.2 0.5
MX636J
Total Error, Internal Trim
(Notes 5, 6)
mV % of
Reading
0.5 1.0
Crest Factor 1 to 2
V
OUT
= [avg. (V
IN
)2]
1/2
Transfer Equation
0.1
Total Error vs. DC Reversal
% of
Reading
0.2
mV % of
Reading/V
0.1 0.01
MX636J
Total Error vs. Supply
MX636K
Total Error vs. Temperature
(0C to +70C)
mV % of
Reading/C
0.1 0.01
0.1 0.005
MX636K
MX636J
UNITS
MIN
TYP
MAX
CONDITIONS
PARAMETER
BUFFER AMPLIFIER
Figure 3
ms/F C
AV
25
Averaging Time Constant
CONVERSION ACCURACY
ERROR vs. CREST FACTOR
(Note 3)
FREQUENCY RESPONSE
(Notes 6, 8)
MX536A/MX636
True RMS-to-DC Converters
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS--MX636 (continued)
(T
A
= +25C, +V
S
= +3V, -V
S
= -5V, unless otherwise noted.)
I
REF
2.8
2
4
8
2
Input Signal Range
A
Peak Transient
5
V
PK
Safe Input
I
REF
Range
12
V
PK
Input Resistance
5.33
6.7
8.00
k
1
50
MX636J
0.5
mV
Input Offset Voltage
MX636K
0.2
A
MX636J
0.5
T
A
= +25C
MX636K
0.2
mV
I
OUT
Scale Factor
T
A
= T
MIN
to T
MAX
10
With Supply Voltage
0.1
V/C
100
Offset Voltage
A/V
RMS
I
OUT
Scale Factor Tolerance
+3V, -5V Supplies
0 to 1
Output Voltage Swing
5V to 16.5V Supplies
0 to 1
1.4
V
-20
10
+20
%
Output Resistance
8
10
12
k
UNITS
MIN
TYP
MAX
CONDITIONS
PARAMETER
MX636J
0.3
0.5
Error
7mV
V
IN
300mV
MX636K
0.1
0.2
Scale Factor
-3
mV/dB
Scale Factor Tempco
Output Resistance
0 to 200
+0.33
%/C
8
10
12
k
Voltage Compliance
-V
S
to
(+V
S
- 2.0)
V
Continuous RMS, All Supplies
All Supplies
5V Supplies
2.5V Supplies
+3V, -5V Supplies
mV
RMS
Input and Output Voltage Range
-V
S
to
(+V
S
- 2)
V
R
S
= 10k
0.8
2
mV
Input Offset Voltage
0.5
1
Input Current
100
300
nA
Input Resistance
10
8
Source
+5
mA
Output Current
Sink
-130
A
Short-Circuit Current
20
mA
Small-Signal Bandwidth
1
MHz
Slew Rate (Note 9)
5
V/s
0dB = 1V
RMS
MX636J
MX636K
-0.033
dB/C
mV/V
dB
INPUT CHARACTERISTICS
OUTPUT CHARACTERISTICS
(Note 5)
dB OUTPUT
I
OUT
TERMINAL
BUFFER AMPLIFIER