参数资料
型号: AD637KQ
厂商: Analog Devices Inc
文件页数: 14/21页
文件大小: 0K
描述: IC RMS/DC CONV PRECISION 14CDIP
产品培训模块: Introduction to Analog RMS-to-DC Technology: Converters and Applications
标准包装: 1
电流 - 电源: 2.2mA
电源电压: ±3 V ~ 18 V
安装类型: 通孔
封装/外壳: 14-CDIP(0.300",7.62mm)
供应商设备封装: 14-CERDIP
包装: 管件
配用: AD637-EVALZ-ND - BOARD EVALUATION FOR AD637
AD637
dB CALIBRATION
Refer to Figure 20:
? Set V IN = 1.00 V dc or 1.00 V rms
? Adjust R1 for 0 dB out = 0.00 V
? Set V IN = 0.1 V dc or 0.10 V rms
? Adjust R2 for dB out = ?2.00 V
Any other dB reference can be used by setting V IN and R1
accordingly.
SIGNAL
INPUT
33.2k ?
R2
5k ?
dB SCALE
FACTOR
ADJUST
+V S
+V S
1 BUFF IN
2 NC
3 COMMON
OUTPUT
4 OFFSET
BUFFER
BIAS
SECTION
AD637
ABSOLUTE
VALUE
SQUARER/DIVIDER
BUFF
OUT 14
V IN 13
NC 12
11
+V S
R3
1k ? *
60.4 ?
2
3
7
AD707JN
4
–V S
6
COMPENSATED
dB OUTPUT
+ 100mV/dB
+V S
4.7k ?
5 CS
25k ?
–V S
10
–V S
DEN
6 INPUT 25k ?
9
+
V OUT
1μF
7 dB OUTPUT
FILTER
8
C AV
10k ?
+V S
NC = NO CONNECT
R1
500k ?
+2.5 V
AD508J
0dB ADJUST
*1k ? + 3500ppm
SEE TEXT
Figure 20. dB Connection
Rev. K | Page 13 of 20
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