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參數(shù)資料
| 型號： | ADA4937-2YCPZ-R7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 19/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC DRIVER DIFF DUAL 24LFCSP |
| 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： | 24-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 24-LFCSP-VQ（4x4） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 765 (CN2011-ZH PDF) |
| 其它名稱： | ADA4937-2YCPZ-R7DKR |
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Data Sheet
ADA4937-1/ADA4937-2
Rev. D | Page 25 of 28
3.3 V OPERATION
The ADA4937-x provides excellent performance in 3.3 V
single-supply applications. Significant power savings can be
realized when the ADA4937-x is used in combination with
a low voltage ADC.
The circuit in Figure 67 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-x performs the single-ended-to-differential
conversion, common-mode level-shifting, and buffering of
the driving signal.
The ADA4937-x 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 the termination
resistor that drives the noninverting input. The signal generator
has a symmetric, ground-referenced bipolar output. The VOCM pin
is connected to the CML output of the AD9230, and sets the out-
put common mode of the ADA4937-x 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-x 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-x
and the AD9230 reduces the noise bandwidth of the amplifier
and isolates the driver outputs from the ADC inputs.
1.8V
DRVDD
AVDD
VIN–
VIN+
AD9230
AGND
CML
D11 TO
D0
30pF
10pF
56nH
33
50
VIN
226
200
VOCM
3.3V
ADA4937-1
+
59
453
06
59
1-
05
7
Figure 67. Driving an AD9230, 12-Bit, 250 MSPS ADC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4937-2YCPZ-RL | 功能描述:IC ADC DRIVER DUAL DIFF 24LFCSP 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 |
| ADA4938-1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultra-Low Distortion Differential ADC Driver |
| ADA4938-1_06 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultra-Low Distortion Differential ADC Driver |
| ADA4938-1_07 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultra-Low Distortion Differential ADC Driver |
| ADA4938-1ACPZ-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:SP AMP DIFF AMP SGL 5.5V/11V 16LFCSP EP - Tape and Reel 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single }5.5V/11V 16-Pin LFCSP EP Tape & Reel 制造商:Analog Devices 功能描述:IC AMP DIFFADCDR16BIT16LFCSP |
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