参数资料
| 型号： | ADA4937-1YCPZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 19/29页 |
| 文件大小： | 0K |
| 描述： | IC ADC DIFF DRIVER 16-LFCSP |
| 设计资源： | Driving AD9233/46/54 ADCs in AC-Coupled Baseband Appls (CN0051) |
| 标准包装： | 5,000 |
| 类型： | ADC 驱动器 |
| 应用： | 数据采集 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 16-LFCSP-VQ |
| 包装： | 带卷 (TR) |
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADA4937-2YCP-EBZ | 功能描述:BOARD EVAL FOR ADA4937-2YCP RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| ADA4937-2YCPZ-R2 | 制造商:Analog Devices 功能描述:SP AMP DIFF AMP DUAL 5.25V 24LFCSP EP - Tape and Reel 制造商:Analog Devices 功能描述:IC DIFF AMP 1.9GHZ 6000V/ LFCSP-24 制造商:Analog Devices 功能描述:IC, DIFF AMP, 1.9GHZ, 6000V/ uS, LFCSP-24, No. of Amplifiers:2, Input Offset Vol |
| ADA4937-2YCPZ-R7 | 功能描述:IC ADC DRIVER DIFF DUAL 24LFCSP RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| ADA4937-2YCPZ-RL | 功能描述:IC ADC DRIVER DUAL DIFF 24LFCSP RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| ADA4938-1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Ultra-Low Distortion Differential ADC Driver |
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