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AD737KRZ-REEL

Description
IC RMS TO DC CONVERTER, 0.005 MHz, PDSO8, MS-012AA, SOIC-8, Analog Special Function Converter
CategoryAnalog mixed-signal IC    converter   
File Size343KB,12 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
Download Datasheet Parametric Compare View All

AD737KRZ-REEL Overview

IC RMS TO DC CONVERTER, 0.005 MHz, PDSO8, MS-012AA, SOIC-8, Analog Special Function Converter

AD737KRZ-REEL Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
Parts packaging codeSOIC
package instructionMS-012AA, SOIC-8
Contacts8
Reach Compliance Codecompliant
ECCN codeEAR99
Converter typeRMS TO DC CONVERTER
JESD-30 codeR-PDSO-G8
JESD-609 codee3
length4.9 mm
Maximum linear error (EL)0.35%
Humidity sensitivity level1
Maximum negative supply voltage-16.5 V
Minimum negative supply voltage-3.2 V
Nominal negative supply voltage-5 V
Number of functions1
Number of terminals8
Maximum operating frequency0.005 MHz
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)240
Maximum positive input voltage1 V
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply voltage16.5 V
Minimum supply voltage2.8 V
Nominal supply voltage5 V
surface mountYES
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
Maximum total error2%
width3.9 mm

AD737KRZ-REEL Preview

a
FEATURES
Computes:
True rms Value
Average Rectified Value
Absolute Value
Provides:
200 mV Full-Scale Input Range
(Larger Inputs with Input Attenuator)
Direct Interfacing with 3 1/2 Digit
CMOS A/D Converters
High Input Impedance of 10
12
Low Input Bias Current: 25 pA Max
High Accuracy: 0.2 mV 0.3% of Reading
RMS Conversion with Signal Crest Factors up to 5
Wide Power Supply Range: +2.8 V, –3.2 V to 16.5 V
Low Power: 160 A Max Supply Current
No External Trims Needed for Specified Accuracy
AD736—A General-Purpose, Buffered Voltage
Output Version also Available
Low Cost, Low Power,
True RMS-to-DC Converter
AD737
*
FUNCTIONAL BLOCK DIAGRAM
8k
C
C 1
AD737
FULL
WAVE
RECTIFIER
INPUT
AMPLIFIER
8
COM
V
IN 2
8k
7
+V
S
POWER
3
DOWN
BIAS
SECTION
RMS CORE
6
OUTPUT
–V
S 4
5
C
AV
Requiring only 160
µA
of power supply current, the AD737 is
optimized for use in portable multimeters and other battery-
powered applications. This converter also provides a power-down
feature that reduces the power supply standby current to less
than 30
µA.
The AD737 allows the choice of two signal input terminals: a
high impedance (10
12
Ω)
FET input that directly interfaces with
high Z input attenuators and a low impedance (8 kΩ) input that
allows the measurement of 300 mV input levels while operating
from the minimum power supply voltage of +2.8 V, –3.2 V. The
two inputs may be used either singly or differentially.
The AD737 achieves a 1% of reading error bandwidth exceeding
10 kHz for input amplitudes from 20 mV rms to 200 mV rms
while consuming only 0.72 mW.
The AD737 is available in four performance grades. The AD737J
and AD737K grades are rated over the commercial temperature
range of 0°C to +70°C. The AD737A and AD737B grades are
rated over the industrial temperature range of –40°C to +85°C.
The AD737 is available in three low cost, 8-lead packages:
plastic DIP, plastic SOIC, and hermetic CERDIP.
PRODUCT HIGHLIGHTS
GENERAL DESCRIPTION
The AD737 is a low power, precision, monolithic true rms-to-dc
converter. It is laser trimmed to provide a maximum error of
±
0.2 mV
±
0.3% of reading with sine wave inputs. Furthermore,
it maintains high accuracy while measuring a wide range of
input waveforms, including variable duty cycle pulses and triac
(phase) controlled sine waves. The low cost and small physical size
of this converter make it suitable for upgrading the performance of
non-rms precision rectifiers in many applications. Compared to
these circuits, the AD737 offers higher accuracy at equal or
lower cost.
The AD737 can compute the rms value of both ac and dc input
voltages. It can also be operated ac-coupled by adding one external
capacitor. In this mode, the AD737 can resolve input signal
levels of 100
µV
rms or less, despite variations in temperature
or supply voltage. High accuracy is also maintained for input
waveforms with crest factors of 1 to 3. In addition, crest factors
as high as 5 can be measured (while introducing only 2.5%
additional error) at the 200 mV full-scale input level.
The AD737 has no output buffer amplifier, thereby significantly
reducing dc offset errors occurring at the output. This allows
the device to be highly compatible with high input impedance
A/D converters.
1. The AD737 is capable of computing the average rectified
value, absolute value, or true rms value of various input signals.
2. Only one external component, an averaging capacitor, is
required for the AD737 to perform true rms measurement.
3. The low power consumption of 0.72 mW makes the AD737
suitable for many battery-powered applications.
*Protected
under U.S. Patent Number 5,495,245.
REV. D
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
AD737–SPECIFICATIONS
Parameter
TRANSFER FUNCTION
CONVERSION ACCURACY
Total Error, Internal Trim
1
All Grades
Conditions
(@ 25 C, 5 V supplies, ac-coupled with 1 kHz sine wave input applied, unless
otherwise noted.)
AD737J/AD737A
Min
Typ
Max
AD737K/AD737B
Min
Typ
Max
Unit
V
OUT
=
1 kHz Sine Wave
AC-Coupled Using C
C
0–200 mV rms
200 mV–1 V rms
Avg V
IN
( )
2
V
OUT
=
Avg V
IN
( )
2
0.2/0.3
–1.2
0.4/0.5
±
2.0
0.5/0.7
0.2/0.2
–1.2
0.2/0.3
±
2.0
0.3/0.5
±
mV/± % of
Reading
% of Reading
±
mV/± % of
Reading
±
% of
Reading/°C
%/V
%/V
% of Reading
% of Reading
±
mV/± % of
Reading
% Additional
Error
% Additional
Error
T
MIN
–T
MAX
A and B Grades
J and K Grades
vs. Supply Voltage
@ 200 mV rms Input
@ 200 mV rms Input
DC Reversal Error,
DC-Coupled
Nonlinearity
2
, 0–200 mV
Total Error, External Trim
ERROR vs. CREST FACTOR
3
Crest Factor 1 to 3
Crest Factor = 5
INPUT CHARACTERISTICS
High Impedance Input (Pin 2)
Signal Range
Continuous rms Level
Peak Transient Input
@ 200 mV rms
@ 200 mV rms
0.007
0.007
V
S
=
±
5 V to
±
16.5 V
V
S
=
±
5 V to
±
3 V
@ 600 mV dc
@ 100 mV rms
0–200 mV rms
0
0
+0.06
–0.18
1.3
+0.25
0.1/0.2
+0.1
–0.3
2.5
+0.35
0
0
+0.06
–0.18
1.3
+0.25
0.1/0.2
+0.1
–0.3
2.5
+0.35
0
0
C
AV
, C
F
= 100
µF
C
AV
, C
F
= 100
µF
0.7
2.5
0.7
2.5
V
S
= +2.8 V, –3.2 V
V
S
=
±
5 V to
±
16.5 V
V
S
= +2.8 V, –3.2 V
V
S
=
±
5 V
V
S
=
±
16.5 V
V
S
=
±
5 V
200
1
±
0.9
±
4.0
±
2.7
10
12
1
±
0.9
±
4.0
25
±
2.7
10
12
1
200
1
Input Resistance
Input Bias Current
Low Impedance Input (Pin 1)
Signal Range
Continuous rms Level
Peak Transient Input
25
mV rms
V rms
V
V
V
pA
V
S
= +2.8 V, –3.2 V
V
S
=
±
5 V to
±
16.5 V
V
S
= +2.8 V, –3.2 V
V
S
=
±
5 V
V
S
=
±
16.5 V
6.4
All Supply Voltages
AC-Coupled
300
l
±
1.7
±
3.8
±
11
8
±
1.7
±
3.8
±
11
8
300
l
Input Resistance
Maximum Continuous
Nondestructive Input
Input Offset Voltage
4
J and K Grades
A and B Grades
vs. Temperature
vs. Supply
vs. Supply
9.6
±
12
±
3
±
3
30
150
6.4
9.6
±
12
±
3
±
3
30
150
mV rms
V rms
V
V
V
kΩ
V p-p
mV
mV
µV/°C
µV/V
µV/V
V
S
=
±
5 V to
±
16.5 V
V
S
=
±
5 V to
±
3 V
8
50
80
8
50
80
–2–
REV. D
AD737
Parameter
OUTPUT CHARACTERISTICS
Output Voltage Swing
No Load
Conditions
AD737J/AD737A
Min
Typ
Max
AD737K/AD737B
Min
Typ
Max
Unit
Output Resistance
FREQUENCY RESPONSE
High Impedance Input (Pin 2)
For 1% Additional Error
V
IN
= 1 mV rms
V
IN
= 10 mV rms
V
IN
= 100 mV rms
V
IN
= 200 mV rms
±
3 dB Bandwidth
V
IN
= 1 mV rms
V
IN
= 10 mV rms
V
IN
= 100 mV rms
V
IN
= 200 mV rms
Low Impedance Input (Pin 1)
For 1% Additional Error
V
IN
= 1 mV rms
V
IN
= 10 mV rms
V
IN
= 100 mV rms
V
IN
= 200 mV rms
±
3 dB Bandwidth
V
IN
= 1 mV rms
V
IN
= 10 mV rms
V
IN
= 100 mV rms
V
IN
= 200 mV rms
POWER SUPPLY
Operating Voltage Range
Quiescent Current
V
IN
= 200 mV rms, No Load
Power-Down Mode Current
TEMPERATURE RANGE
Operating, Rated Performance
Commercial (0°C to +70°C)
Industrial (–40°C to +85°C)
V
S
= +2.8 V, –3.2 V
V
S
=
±
5 V
V
S
=
±
16.5 V
@ dc
0 to –1.6
0 to –3.3
0 to –4
6.4
–1.7
–3.4
–5
8
9.6
0 to –1.6
0 to –3.3
0 to –4
6.4
–1.7
–3.4
–5
8
9.6
V
V
V
kΩ
Sine Wave Input
1
6
37
33
Sine Wave Input
5
55
170
190
Sine Wave Input
1
6
90
90
Sine Wave Input
5
55
350
460
+2.8, –3.2
Zero Signal
Sine Wave Input
Pin 3 Tied to +V
S
±
5
120
170
25
±
16.5
160
210
40
+2.8, –3.2
5
55
350
460
±
5
120
170
25
±
16.5
160
210
40
kHz
kHz
kHz
kHz
V
µA
µA
µA
1
6
90
90
kHz
kHz
kHz
kHz
5
55
170
190
kHz
kHz
kHz
kHz
1
6
37
33
kHz
kHz
kHz
kHz
AD737J
AD737A
AD737K
AD737B
NOTES
l
Accuracy is specified with the AD737 connected as shown in Figure 1 with capacitor C
C
.
2
Nonlinearity is defined as the maximum deviation (in percent error) from a straight line connecting the readings at 0 and 200 mV rms.
3
Error versus crest factor is specified as additional error for a 200 mV rms signal. Crest factor = V
PEAK
/V rms.
4
DC offset does not limit ac resolution.
Specifications are subject to change without notice.
Specifications shown in
boldface
are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels.
REV. D
–3–
AD737
ABSOLUTE MAXIMUM RATINGS
1
PIN CONFIGURATIONS
Plastic DIP (N-8), CERDIP (Q-8), SOIC (SOIC-8)
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
16.5 V
Internal Power Dissipation
2
. . . . . . . . . . . . . . . . . . . . 200 mW
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
V
S
Output Short-Circuit Duration . . . . . . . . . . . . . . . . Indefinite
Differential Input Voltage . . . . . . . . . . . . . . . . . . +V
S
and –V
S
Storage Temperature Range (Q) . . . . . . . . . –65°C to +150°C
Storage Temperature Range (N, R) . . . . . . . –65°C to +125°C
Operating Temperature Range
AD737J/AD737K . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
AD737A/AD737B . . . . . . . . . . . . . . . . . . . –40°C to +85°C
Lead Temperature Range (Soldering 60 sec) . . . . . . . . . 300°C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 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
8-Lead Plastic DIP Package:
JA
= 165°C/W
8-Lead CERDIP Package:
JA
= 110°C/W
8-Lead Small Outline Package:
JA
= 155°C/W
8k
C
C 1
AD737
FULL
WAVE
RECTIFIER
INPUT
AMPLIFIER
8
COM
V
IN 2
8k
7
+V
S
POWER
3
DOWN
BIAS
SECTION
RMS CORE
6
OUTPUT
–V
S 4
5
C
AV
ORDERING GUIDE
Model
AD737AQ
AD737BQ
AD737JN
AD737JR
AD737JR-REEL
AD737JR-REEL7
AD737KN
AD737KR
AD737KR-REEL
AD737KR-REEL7
Temperature
Range
–40°C to +85°C
–40°C to +85°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
Package
Description
CERDIP
CERDIP
Plastic DIP
SOIC
13" Tape and Reel
7" Tape and Reel
Plastic DIP
SOIC
13" Tape and Reel
7" Tape and Reel
Package
Option
Q-8
Q-8
N-8
R-8
R-8
R-8
N-8
R-8
R-8
R-8
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
AD737 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended
to avoid performance degradation or loss of functionality.
–4–
REV. D
Typical Performance Characteristics–AD737
0.7
ADDITIONAL ERROR – % of Reading
PEAK INPUT BEFORE CLIPPING – V
16
V
IN
= 200mV rms
SINE WAVE @ 1kHz
C
AV
= 100 F
C
F
= 22 F
DC-COUPLED
14
SUPPLY CURRENT – A
25
0.5
12
10
PIN 1
8
PIN 2
6
4
2
0
0
2
4
6
8
10
12
SUPPLY VOLTAGE – V
14
16
20
0.3
0.1
0
–0.1
15
10
–0.3
–0.5
0
2
4
6
8
10
12
SUPPLY VOLTAGE – V
14
16
5
0
2
4
6
8 10 12 14 16
DUAL SUPPLY VOLTAGE – V
18
TPC 1. Additional Error vs. Supply
Voltage
TPC 2. Maximum Input Level vs.
Supply Voltage
TPC 3. Power-Down Current vs.
Supply Voltage
10V
SINE WAVE INPUT, V
S
= 5V,
C
AV
= 22 F, C
F
= 4.7 F, C
C
= 22 F
1V
INPUT LEVEL – rms
INPUT LEVEL – rms
10V
ADDITIONAL ERROR – % of Reading
6
SINE WAVE INPUT, V
S
= 5V,
C
AV
= 22 F, C
F
= 4.7 F, C
C
= 22 F
1V
8
4
100mV
1% ERROR
10mV
–3dB
1mV
10% ERROR
100 V
0.1
100mV
1% ERROR
10mV
3ms BURST OF 1kHz =
3 CYCLES
C
AV
= 10 F
200mV rms SIGNAL
V
S
= 5V
C
C
= 22 F
C
AV
= 33 F
C
F
= 100 F
3
2
1mV
10% ERROR
–3dB
1
C
AV
= 100 F
C
AV
= 250 F
1
10
100
FREQUENCY – kHz
1000
100 V
0.1
0
1
10
100
FREQUENCY – kHz
1000
1
2
3
4
CREST FACTOR (V
PEAK
/V rms)
5
TPC 4. Frequency Response
Driving Pin 1
TPC 5. Frequency Response
Driving Pin 2
TPC 6. Additional Error vs. Crest
Factor vs. C
AV
0.8
ADDITIONAL ERROR – % of Reading
500
V
IN
= 200mV rms
SINE WAVE @ 1kHz
C
C
= 22 F
C
AV
= 100 F
C
F
= 22 F
V
S
= 5V
10mV
V
IN
= SINE WAVE
AC-COUPLED
V
S
= 5V
INPUT LEVEL – rms
1mV
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
400
DC SUPPLY CURRENT –
A
300
200
100 V
100
–0.8
–60 –40 –20
0 20 40 60 80 100 120 140
TEMPERATURE – C
0
0
0.2
0.4
0.6
0.8
RMS INPUT LEVEL – V
1.0
10 V
100
10k
1k
–3dB FREQUENCY – Hz
100k
TPC 7. Additional Error vs.
Temperature
TPC 8. DC Supply Current vs.
RMS Input Level
TPC 9. –3 dB Frequency vs. RMS
Input Level (Pin 2)
REV. D
–5–

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AD737KRZ-REEL AD737JRZ-REEL7 AD737KRZ-REEL7
Description IC RMS TO DC CONVERTER, 0.005 MHz, PDSO8, MS-012AA, SOIC-8, Analog Special Function Converter IC RMS TO DC CONVERTER, 0.005 MHz, PDSO8, MS-012AA, SOIC-8, Analog Special Function Converter IC RMS TO DC CONVERTER, 0.005 MHz, PDSO8, MS-012AA, SOIC-8, Analog Special Function Converter
Is it lead-free? Contains lead Contains lead Contains lead
Is it Rohs certified? conform to conform to conform to
Maker ADI ADI ADI
Parts packaging code SOIC SOIC SOIC
package instruction MS-012AA, SOIC-8 SOP, MS-012AA, SOIC-8
Contacts 8 8 8
Reach Compliance Code compliant compliant compliant
ECCN code EAR99 EAR99 EAR99
Converter type RMS TO DC CONVERTER RMS TO DC CONVERTER RMS TO DC CONVERTER
JESD-30 code R-PDSO-G8 R-PDSO-G8 R-PDSO-G8
JESD-609 code e3 e3 e3
length 4.9 mm 4.9 mm 4.9 mm
Maximum linear error (EL) 0.35% 0.35% 0.35%
Humidity sensitivity level 1 1 1
Maximum negative supply voltage -16.5 V -16.5 V -16.5 V
Minimum negative supply voltage -3.2 V -3.2 V -3.2 V
Nominal negative supply voltage -5 V -5 V -5 V
Number of functions 1 1 1
Number of terminals 8 8 8
Maximum operating frequency 0.005 MHz 0.005 MHz 0.005 MHz
Maximum operating temperature 70 °C 70 °C 70 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP SOP SOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE
Peak Reflow Temperature (Celsius) 240 240 240
Maximum positive input voltage 1 V 1 V 1 V
Certification status Not Qualified Not Qualified Not Qualified
Maximum seat height 1.75 mm 1.75 mm 1.75 mm
Maximum supply voltage 16.5 V 16.5 V 16.5 V
Minimum supply voltage 2.8 V 2.8 V 2.8 V
Nominal supply voltage 5 V 5 V 5 V
surface mount YES YES YES
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL
Terminal surface Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING GULL WING GULL WING
Terminal pitch 1.27 mm 1.27 mm 1.27 mm
Terminal location DUAL DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
Maximum total error 2% 2% 2%
width 3.9 mm 3.9 mm 3.9 mm
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