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參數(shù)資料
| 型號： | AD650SD |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 9/20頁 |
| 文件大小： | 385K |
| 描述： | IC V-F/F-V CONV 1MHZ 14-CDIP |
| 標準包裝： | 1 |
| 類型： | 電壓至頻率和頻率至電壓 |
| 頻率 - 最大： | 1MHz |
| 全量程： | ±150ppm/°C |
| 線性： | ±0.1% |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 14-CDIP（0.300"，7.62mm） |
| 供應商設(shè)備封裝： | 14-CDIP |
| 包裝： | 管件 |
Data Sheet
AD650
Rev. E | Page 9 of 20
If the approximate amount of noise that appears on CINT is known
(VNOISE), then the value of CINT can be checked using the following
inequality:
NOISE
S
OS
INT
V
V
A
t
C
-
-
+
?/DIV>
?/DIV>
>
-
V
3
10
1
3
(8)
For example, consider an application calling for a maximum
frequency of 75 kHz, a 0 V to 1 V signal range, and supply
voltages of only ? V. The component selection guide of Figure 9
is used to select 2.0 k?for RIN and 1000 pF for COS. This results
in a one-shot time period of approximately 7 約. Substituting
75 kHz into Equation 7 yields a value of 1300 pF for C
INT
. When
the input signal is near zero, 1 mA flows through the integration
capacitor to the switched current sink during the reset phase,
causing the voltage across CINT to increase by approximately 5.5 V.
Because the integrator output stage requires approximately 3 V
headroom for proper operation, only 0.5 V margin remains for
integrating extraneous noise on the signal line. A negative noise
pulse at this time could saturate the integrator, causing an error
in signal integration. Increasing C
INT
to 1500 pF or 2000 pF
provides much more noise margin, thereby eliminating this
potential trouble spot.
1MHz
100kHz
10kHz
50 100
1000
C
OS
(pF)
INPUT
RESISTOR
16.9k
20k
40.2k
100k
Figure 9. Full-Scale Frequency vs. COS
100
20
50 100
1000
ONE SHOT CAPACITOR
C
OS
(pF)
1000
INPUT
RESISTOR
16.9k
40.2k
100k
20k
Figure 10. Typical Nonlinearity vs. COS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD650SD/883B | 功能描述:電壓頻率轉(zhuǎn)換及頻率電壓轉(zhuǎn)換 IC - V/F CONVERTER IC RoHS:否 制造商:Texas Instruments 全標度頻率:4000 KHz 線性誤差:+/- 1 % FSR 電源電壓-最大: 電源電壓-最小: 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 安裝風格:Through Hole 封裝 / 箱體:PDIP-14 封裝:Tube |
| AD650SD-883B | 制造商:AD 制造商全稱:Analog Devices 功能描述:Voltage-to-Frequency and Frequency-to-Voltage Converter |
| AD650TYHHLBOX | 制造商:Advanced Micro Devices 功能描述:AMD A-SERIES APU A8-6500T X4 3100MHZ 4MB FM2 45W PIB - Boxed Product (Development Kits) |
| AD651AQ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter |
| AD651SQ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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