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參數(shù)資料
| 型號： | 5962-8963701CX |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬專用變換器 |
| 英文描述： | RMS TO DC CONVERTER, 0.15 MHz, CDIP14 |
| 封裝： | CERDIP-14 |
| 文件頁數(shù)： | 5/20頁 |
| 文件大?。?/td> | 515K |
| 代理商： | 5962-8963701CX |
AD637
Rev. G | Page 13 of 20
PULSE WIDTH (
s)
10
1
0.01
1
1000
10
INCREASE
IN
ERROR
(%)
100
0.1
CAV = 22 F
CF = 10
CF = 3
0
100
F
Vp
T
e0
η = DUTY CYCLE = 100s
T
CF = 1/
η
eIN(RMS) = 1 V RMS
00788-018
Figure 16. AD637 Error vs. Pulse Width Rectangular Pulse
Figure 17 is a curve of additional reading error for the AD637
for a 1 V rms input signal with crest factors from 1 to 11. A
rectangular pulse train (pulse width 100 s) was used for this
test because it is the worst-case waveform for rms measurement
(all the energy is contained in the peaks). The duty cycle and
peak amplitude were varied to produce crest factors from l to 10
while maintaining a constant 1 V rms input amplitude.
CREST FACTOR
1.5
0
–1.5
11
2
INCREASE
IN
ERROR
(%)
37
89
10
1.0
0.5
–0.5
–1.0
1
POSITIVE INPUT PULSE
CAV = 22 F
00788-
019
45
6
Figure 17. Additional Error vs. Crest Factor
VIN (V rms)
2.0
1.8
0
2.0
0.5
1.0
1.5
1.2
0.6
0.4
0.2
1.6
1.4
0.8
1.0
MAG
N
ITUDE
O
F
ERRO
R
(%
of
rms
Level)
CF = 10
CF = 7
CF = 3
0
00788-
020
Figure 18. Error vs. RMS Input Level for Three Common Crest Factors
CONNECTION FOR DB OUTPUT
Another feature of the AD637 is the logarithmic, or decibel,
output. The internal circuit that computes dB works well over a
60 dB range. Figure 19 shows the dB measurement connection.
The user selects the 0 dB level by setting R1 for the proper 0 dB
reference current, which is set to exactly cancel the log output
current from the squarer/divider circuit at the desired 0 dB
point. The external op amp is used to provide a more
convenient scale and to allow compensation of the +0.33%/°C
temperature drift of the dB circuit. The special TC resistor R3 is
available from Precision Resistor Inc., Largo, Fla (Model PT146).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 5962-89640012A | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| 5962-89641012A | 制造商:Analog Devices 功能描述:OP Amp Single GP ±18V 20-Pin LCC 制造商:Analog Devices 功能描述:OP AMP SGL GP 18V 20PIN LCC - Rail/Tube 制造商:Analog Devices Inc. 功能描述:Precision Amplifiers FAST SETTLING HS IC |
| 5962-8964101CA | 制造商:Analog Devices 功能描述:OP Amp Single GP ±18V 12-Pin TO-8 制造商:Rochester Electronics LLC 功能描述:FAST SETTLING H.S. OP AMP - Bulk |
| 5962-89642012A | 功能描述:運(yùn)算放大器 - 運(yùn)放 HIGH OUTPUT CURRENT IC RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 共模抑制比（最小值）:120 dB 輸入補(bǔ)償電壓:6 V 輸入偏流（最大值）:1400 pA 工作電源電壓:4 V to 36 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 轉(zhuǎn)換速度:0.8 V / us 關(guān)閉:No 輸出電流: 最大工作溫度:+ 125 C 封裝:Reel |
| 59628964201CA | 制造商:AD 功能描述:5962-8964201CA |
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