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| 型號： | ADA4941-1YCPZ-R7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 16/25頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP DIFF ADC DVR 18BIT 8LFCSP |
| 設(shè)計資源： | 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： | 1 |
| 類型： | ADC 驅(qū)動器 |
| 應(yīng)用： | 數(shù)據(jù)采集 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-VFDFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 8-LFCSP-VD（3x3） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 765 (CN2011-ZH PDF) |
| 其它名稱： | ADA4941-1YCPZ-R7DKR |
ADA4941-1
Rev. C | Page 22 of 24
DRIVING THE AD7687 ADC
The ADA4941-1 is an excellent driver for high resolution
ADCs, such as the AD7687, as shown in Figure 56. The Sallen-
Key, low-pass filter shown in Figure 54 is included in this
example but is not required. The circuit shown in Figure 56
accepts single-ended input signals that swing between 0 V and 3 V.
The ADR443 provides a stable, low noise, 3 V reference that is
buffered by one of the AD8032 amplifiers and applied to the
AD7687 REF input, providing a differential input full-scale level
of 6 V. The reference voltage is also divided by two and buffered
to supply the midsupply REF level of 1.5 V for the ADA4941-1.
GAIN OF 2 CONFIGURATION
The ADA4941-1 can be operated in a configuration referred
to as gain of 2. Clearly, a gain of 2 can be achieved by
simply swapping the outputs of a gain of +2 circuit, but the
configuration described here is different. The configuration is
referred to as having negative gain to emphasize that the input
amplifier, A1, is operated as an inverting amplifier instead of in
its usual noninverting mode. As implied in its name, the voltage
of 2 configuration on ±5 V supplies.
The gain of 2 configuration is most useful in applications that
have wide input swings because the input common-mode
voltages are held at constant levels. The signal size is therefore
constrained by the output swing limits. The gain of 2 has a low
input resistance that is equal to RG.
1k
1k
GND
500
A2
A1
ADA4941-1
REF
IN
IN+
IN–
2
8
4
2.7nF
5
FB
+5V
–5V
560pF
VS+
VS–
OUT+
1
3
OUT–
VIN
VIN
0V TO 3V
VOUT
562
562
562
1.69k
33
33
6
05704-
060
0.1F
10F
2.7nF
3.9nF
10nF
1/2
AD8032
ADR443
4
8
1
4
0.1F
3
4
2
6
2
1/2
AD8032
AD7687
7
5
6
+5V
1k
1k
10F
0.1F
VDD
GND
5
REF
1
2
Figure 56. ADA4941-1 Driving the AD7687 ADC
1k
1k
RF
1k
RG
1k
500
500
A2
A1
REF
IN
2
8
4
5
FB
+5V
–5V
VS+
VS–
OUT+
1
3
6
OUT–
VIN
05704-
061
+
–
VO, dm
Figure 57. Gain of 2 Configuration
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4941-1YCPZ-RL | 功能描述:IC DIFF ADC DRIVER 18BIT 8-LFCSP 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:可變增益放大器 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 |
| ADA4941-1YR-EBZ | 功能描述:BOARD EVAL FOR ADA4941-1YR RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運算放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| ADA4941-1YRZ | 功能描述:IC DIFF ADC DVR 18BIT 8-SOIC 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:可變增益放大器 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 |
| ADA4941-1YRZ-R7 | 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:可變增益放大器 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 |
| 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:可變增益放大器 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 |
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