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參數(shù)資料
| 型號： | ADA4922-1 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | High Voltage, Differential 18-Bit ADC Driver |
| 中文描述： | 高電壓，差分18位ADC驅(qū)動器 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 312K |
| 代理商： | ADA4922-1 |
ADA4922-1
THEORY OF OPERATION
The ADA4922-1 is dual amplifier that has been optimized to
drive a differential ADC from a single-ended input source with
a minimum number of external components (see Figure 41).
Rev. 0 | Page 14 of 20
R
R
IN
OUT+
OUT–
REF
0
Figure 41. Functional Diagram
The differential output voltage is defined as
V
O, dm
=
V
OUT+
V
OUT
(1)
Each amplifier in Figure 41 is identical, and the value of Resistor R
is set at 600 Ω, yielding an optimal trade-off between output
differential noise, internal power dissipation, and overall
system linearity. For basic operation, the REF input is tied to
the midswing level of the input signal, which is often midsupply.
The input signal (referenced to REF) produces a differential
output signal with an overall gain of +2. Figure 42 shows typical
operation on ±12 V supplies with the source referenced to 0 V
and the REF pin tied to 0 V.
20
–10
0
50
0
TIME (
μ
s)
V
10
0
–10
–20
10
5
0
–5
5
15
10
20
25
30
35
40
45
OUT+
OUT–
REF
V
IN
Figure 42. Typical Input/Output Response—Centered Reference
If an application uses an input midswing voltage other than
midsupply, the REF pin needs to be offset to the input midswing
level to obtain outputs that do not exhibit a differential offset
(see Figure 43). If the voltage applied to the REF pin is different
from the midswing level of the input signal, a dc offset is
created between outputs V
OUT+
and V
OUT
. Figure 44 illustrates
this condition when the input signal is referenced to a positive
level, and the REF pin is connected to 0 V.
10
–2.5
0
50
0
TIME (
μ
s)
V
5
0
–5
–10
10
5
0
5
15
10
20
25
30
35
40
45
OUT+
OUT–
REF
V
IN
Figure 43. Typical Input/Output Response—Equal Input/Reference
20
–10
0
50
0
TIME (
μ
s)
V
15
10
5
0
–5
10
5
0
–5
5
15
10
20
25
30
35
40
45
OUT+
OUT–
REF
V
IN
Figure 44. Typical Input/Output Response—Unequal Input/Reference
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ADA4922-1ACP-EBZ | 功能描述:BOARD EVAL FOR ADA4922-1ACP 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:- |
| ADA4922-1ACPZ-R2 | 功能描述:IC ADC DRIVER 18BIT DIFF 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 |
| ADA4922-1ACPZ-R7 | 制造商:Analog Devices 功能描述:SP AMP DIFF LINE DRVR AMP SGL R-R O/P 26V 8LFCSP EP - Bulk |
| ADA4922-1ACPZ-RL | 功能描述:IC ADC DRIVER 18BIT DIFF 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 |
| ADA4922-1ACPZ-RL7 | 功能描述:IC ADC DRVR 18BIT HV DIFF 8LFCSP 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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