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AD737JRZ-5-R7 Datasheet(PDF) 17 Page - Analog Devices

Part No. AD737JRZ-5-R7
Description  Low Cost, Low Power, True RMS-to-DC Converter
Download  24 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD737JRZ-5-R7 Datasheet(HTML) 17 Page - Analog Devices

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Data Sheet
AD737
Rev. I | Page 17 of 24
+
RCAL**
R1**
IREF
10
*
11
9
Q2
**R1 + RCAL IN Ω = 10,000 ×
4.3V
0dB INPUT LEVEL IN V
AD711
1kΩ
3500PPM/°C
60.4Ω
dB OUTPUT
100mV/dB
PRECISION
RESISTOR
CORP
TYPE PT/ST
2kΩ
31.6kΩ
SCALE
FACTOR
TRIM
13
Q1
12
14
*
RMS
CORE
AD737
BIAS
SECTION
INPUT
AMPLIFIER
8kΩ
8kΩ
1
2
3
4
8
7
6
5
3
6
2
VIN
POWER
DOWN
–VS
CC
COM
OUTPUT
+VS
NC
CAV
CAV
+
CC
10µF
NC = NO CONNECT
*Q1, Q2 PART OF RCA CA3046 OR SIMILAR NPN TRANSISTOR ARRAY.
FULL-WAVE
RECTIFIER
Figure 30. dB Output Connection
COM
1
2
3
8
7
6
VOUT
+VS
–VS
+VS
CC
VIN
POWER
DOWN
AD737
INPUT
AMPLIFIER
OFFSET ADJUST
500kΩ
8kΩ
SCALE
FACTOR
ADJUST
1kΩ
1MΩ
1kΩ
499Ω
FULL-WAVE
RECTIFIER
Figure 31. DC-Coupled Offset Voltage and Scale Factor Trims


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