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参数资料
| 型号： | AD650AD |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/20页 |
| 文件大小： | 385K |
| 描述： | IC V-F/F-V CONV 1MHZ 14-CDIP |
| 标准包装： | 25 |
| 类型： | 电压至频率和频率至电压 |
| 频率 - 最大： | 1MHz |
| 全量程： | ±150ppm/°C |
| 线性： | ±0.1% |
| 安装类型： | 通孔 |
| 封装/外壳： | 14-CDIP（0.300"，7.62mm） |
| 供应商设备封装： | 14-CDIP |
| 包装： | 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD650ADE | 制造商:Analog Devices 功能描述: |
| AD650B | 制造商:AD 制造商全称:Analog Devices 功能描述:Voltage-to-Frequency and Frequency-to-Voltage Converter |
| AD650BD | 功能描述:IC V-F/F-V CONV 1MHZ 14-CDIP RoHS:否 类别:集成电路 (IC) >> PMIC - V/F 和 F/V 转换器 系列:- 标准包装:1 系列:- 类型:频率至电压 频率 - 最大:10kHz 全量程:- 线性:±0.3% 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:Digi-Reel® 其它名称:LM2917MX-8/NOPBDKR |
| AD650J | 制造商:AD 制造商全称:Analog Devices 功能描述:Voltage-to-Frequency and Frequency-to-Voltage Converter |
| AD650JN | 功能描述:IC V-F/F-V CONVERTER 14-DIP RoHS:否 类别:集成电路 (IC) >> PMIC - V/F 和 F/V 转换器 系列:- 标准包装:1 系列:- 类型:频率至电压 频率 - 最大:10kHz 全量程:- 线性:±0.3% 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:Digi-Reel® 其它名称:LM2917MX-8/NOPBDKR |
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