參數(shù)資料
型號(hào)： ADA4941-1YRZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 15/25頁(yè)
文件大小： 0K
描述： IC DIFF ADC DVR 18BIT 8-SOIC
設(shè)計(jì)資源： Converting a Single-Ended Signal with AD7982 Differential PulSAR ADC (CN0032)
Converting a Single-Ended Signal with AD7984 Differential PulSAR ADC (CN0033)
標(biāo)準(zhǔn)包裝： 98
類型： ADC 驅(qū)動(dòng)器
應(yīng)用： 數(shù)據(jù)采集
安裝類型： 表面貼裝
封裝/外殼： 8-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 8-SO
包裝： 管件
產(chǎn)品目錄頁(yè)面： 768 (CN2011-ZH PDF)
ADA4941-1
Rev. C | Page 21 of 24
ADDING A 3-POLE, SALLEN-KEY FILTER
The noninverting amplifier in the ADA4941-1 can be used as
the buffer amplifier of a Sallen-Key filter. A 3-pole, low-pass
filter can be designed to limit the signal bandwidth in front of
an ADC. The input signal first passes through the noninverting
stage where it is filtered. The filtered signal is then passed through
the inverting stage to obtain the complementary output.
Figure 54 illustrates a 3-pole, Sallen-Key, low-pass filter with a
3 dB cutoff frequency of 100 kHz. The 1.69 k resistor is
included to minimize dc errors due to the input offset current
in A1. The passive RC filters on the outputs are generally
required by the ADC converter that is being driven. The
frequency response of the filter is shown in Figure 55.
1k
1k
500
A2
A1
REF
IN
2
8
4
2.7nF
5
FB
+5V
–5V
560pF
VS+
VS–
OUT+
+
–
VO, dm
1
3
OUT–
VIN
562
562
562
1.69k
33
33
6
05704-
058
0.1F
2.7nF
3.9nF
10nF
Figure 54. Sallen-Key, Low-Pass Filter with 100 kHz Cutoff Frequency
0
–100
10
100M
FREQUENCY (Hz)
V
O,
d
m
/V
IN
(
dB
)
05704-
059
–10
–20
–30
–40
–50
–60
–70
–80
–90
100
1k
10k
100k
1M
10M
VO, dm = 3V p-p
Figure 55. Frequency Response of the Circuit Shown in Figure 54
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ADA4941-1YRZ-RL 功能描述:IC DIFF ADC DRIVER 18BIT 8SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:可變?cè)鲆娣糯笃?應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤
ADA4950-1 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Power, Selectable Gain Differential ADC Driver, G = 1, 2, 3
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ADA4950-1YCPZ-R2 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single ±5.5V/11V 16-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:FIXED GAIN 1,2&3 DIFF ADC DRIVER - Tape and Reel 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single }5.5V/11V 16-Pin LFCSP EP
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