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參數(shù)資料
| 型號： | ADA4937-1 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Ultralow Distortion, Differential ADC Driver |
| 中文描述： | 超低失真差分ADC驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 24/28頁 |
| 文件大?。?/td> | 448K |
| 代理商： | ADA4937-1 |
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ADA4937-1
Rev. 0 | Page 24 of 28
0
1.8V
DRVDD
AVDD
VIN–
VIN+
AD9230
AGND
CML
D11 TO
D0
30pF
10pF
56nH
56nH
33
33
50
V
IN
226
200
V
OCM
3.3V
ADA4937-1
+
59
453
453
Figure 54. ADA4937-1 Driving an AD9230, a 12-Bit, 250 MSPS ADC
3.3 V OPERATION
The ADA4937-1 provides excellent performance in 3.3 V
single-supply applications. Significant power savings can be
realized when the ADA4937-1 is used in combination with a
low voltage ADC.
The circuit in Figure 54 is an example of the ADA4937-1
driving an
AD9230
, 12-bit, 250 MSPS ADC that is specified to
operate with a single 1.8 V supply. The performance of the
ADC is optimized when it is driven differentially, making the
best use of the signal swing available within the 1.8 V supply.
The ADA4937-1 performs the single-ended-to-differential
conversion, common-mode level-shifting, and buffering of the
driving signal.
The ADA4937-1 is configured with a single 3.3 V supply and a
gain of 2 V/V for a single-ended input to differential output. The
59 Ω termination resistor, in parallel with the single-ended input
impedance of 306 Ω, provides a 50 Ω termination for the source.
The additional 26 Ω (226 Ω total) at the inverting input balances
the parallel impedance of the 50 Ω source and termination
resistor driving the noninverting input.
The signal generator has a symmetric, ground-referenced bipolar
output. The V
OCM
pin is connected to the CML output of the
AD9230
, and sets the output common mode of the ADA4937-1 at
1.4 V. One-third of the output common-mode voltage of the
amplifier is fed back to the summing nodes, biasing –IN and + IN
at ~ 0.5 V For a common-mode voltage of 1.4 V each ADA4937-1
output swings between 1.09 V and 1.71 V providing a 1.25 V p-p
differential output.
A third-order, 125 MHz, low-pass filter between the ADA4937-1
and the
AD9230
reduces the noise bandwidth of the amplifier
and isolates the driver outputs from the ADC inputs.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADA4937-1_07 | Ultralow Distortion, Differential ADC Driver |
| ADA4937-1YCPZ-R2 | Ultralow Distortion, Differential ADC Driver |
| ADA4937-1YCPZ-R7 | Ultralow Distortion, Differential ADC Driver |
| ADA4937-1YCPZ-RL | Ultralow Distortion, Differential ADC Driver |
| ADA4938-1_07 | Ultra-Low Distortion Differential ADC Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4937-1_07 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultralow Distortion, Differential ADC Driver |
| ADA4937-1YCP-EBZ | 功能描述:BOARD EVAL FOR ADA4937-1YCP RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運(yùn)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:- |
| ADA4937-1YCPZ-R2 | 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single 5.25V 16-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:SP AMP DIFF AMP SGL 5.25V 16LFCSP EP - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single 5.25V 16-Pin LFCSP EP Tape & Reel 制造商:Analog Devices 功能描述:IC ADC DRIVERDIFF16LFCSP 制造商:Analog Devices 功能描述:OP Amp Differential ADC Driver LFCSP16 |
| ADA4937-1YCPZ-R2 | 制造商:Analog Devices 功能描述:IC DIFF AMP 1.9GHZ 6000V/S LFCSP-16 |
| ADA4937-1YCPZ-R7 | 功能描述:IC ADC DRIVER DIFF 16-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 |
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