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參數資料
| 型號： | ADA4932-1YCP-EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 19/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR ADA4932-1YCP |
| 標準包裝： | 1 |
| 每 IC 通道數： | 1 - 單 |
| 放大器類型： | 差分 |
| 板類型： | 裸（未填充） |
| 已供物品： | 板 |
| 已用 IC / 零件： | 16-LFCSP 封裝 |
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Data Sheet
ADA4932-1/ADA4932-2
HIGH PERFORMANCE ADC DRIVING
The ADA4932-x is ideally suited for broadband dc-coupled
applications. The circuit in Figure 67 shows a front-end
20 MSPS/40 MSPS/65 MSPS/80 MSPS ADC, with dc coupling
on the ADA4932-1 input and output. (The AD9245 achieves
its optimum performance when driven differentially.) The
ADA4932-1 eliminates the need for a transformer to drive the
ADC and performs a single-ended-to-differential conversion and
buffering of the driving signal.
The ADA4932-1 is configured with a single 3.3 V supply and a
gain of 1 for a single-ended input to differential output. The
53.6 termination resistor, in parallel with the single-ended
input impedance of approximately 665 , provides a 50
termination for the source. The additional 25.5 (524.5
total) at the inverting input balances the parallel impedance
of the 50 source and the termination resistor driving the
noninverting input.
In this example, the signal generator has a 1 V p-p symmetric,
ground-referenced bipolar output when terminated in 50 .
The VOCM input is bypassed for noise reduction, and set externally
with 1% resistors to maximize output dynamic range on the
tight 3.3 V supply.
Because the inputs are dc-coupled, dc common-mode current
flows in the feedback loops, and a nominal dc level of 0.84 V is
present at the amplifier input terminals. A fraction of the output
signal is also present at the input terminals as a common-mode
signal; its level is equal to the ac output swing at the noninverting
output, divided down by the feedback factor of the lower loop.
In this example, this ripple is 0.5 V p-p × [524.5/(524.5 + 511)] =
0.25 V p-p. This ac signal is riding on the 0.84 V dc level, produc-
ing a voltage swing between 0.72 V and 0.97 V at the input
terminals. This is well within the specified limits of 0.2 V to 1.5 V.
With an output common-mode voltage of 1.65 V, each
ADA4932-1 output swings between 1.4 V and 1.9 V, opposite in
phase, providing a gain of 1 and a 1 V p-p differential signal to
the ADC input. The differential RC section between the
ADA4932-1 output and the ADC provides single-pole low-pass
filtering and extra buffering for the current spikes that are output
from the ADC input when its SHA capacitors are discharged.
The AD9245 is configured for a 1 V p-p full-scale input by
connecting its SENSE pin to VREF, as shown in Figure 67.
ADA4932-1
3.3V
50
499
25.5
10k
1%
511
33
VOCM
2V p-p
SIGNAL
GENERATOR
1V p-p CENTERED
AT GROUND
53.6
0.1F
10F
+
0.1F
10k
1%
20pF
VIN–
AVDD
VIN+ VREF SENSE AGND
AD9245
VOUT, dm = 1V p-p
VOUT, cm = 1.65V
07752-
270
Figure 67. ADA4932-1 Driving an AD9245 ADC with DC-Coupled Input and Output
Rev. C | Page 25 of 28
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相關代理商/技術參數 |
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| ADA4932-1YCPZ-R2 | 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single 制造商:Analog Devices 功能描述:LW CST/LW PWR DIFF ADC DRIVER - Tape and Reel 制造商:Analog Devices 功能描述:ANAADA4932-1YCPZ-R2 LW CST/LW PWR DIFF A 制造商:Analog Devices 功能描述:AMP DIFF LP 80MA 16LFCSP 制造商:Analog Devices 功能描述:AMP, DIFF, LP, 80MA, 16LFCSP 制造商:Analog Devices 功能描述:AMP, DIFF, LP, 80MA, 16LFCSP; No. of Amplifiers:1; Input Offset Voltage:2.2mV; Bandwidth:560MHz; Amplifier Case Style:LFCSP; No. of Pins:16; Supply Voltage Range:3V to 11V; Slew Rate:2800V/s; Supply Current:9.6mA; Operating ;RoHS Compliant: Yes 制造商:Analog Devices 功能描述:SP Amp Diff ADC Driver Single 5.5V/11V |
| ADA4932-1YCPZ-R2 | 制造商:Analog Devices 功能描述:IC DIFF AMP 560MHZ 2800V/ LFCSP-16 |
| ADA4932-1YCPZ-R21 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Power Differential ADC Driver |
| ADA4932-1YCPZ-R7 | 功能描述:IC AMP DIFF LP 80MA 16LFCSP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產品培訓模塊:Differential Circuit Design Techniques for Communication Applications 標準包裝:1 系列:- 放大器類型:RF/IF 差分 電路數:1 輸出類型:差分 轉換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤，CSP 供應商設備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產品目錄頁面:551 (CN2011-ZH PDF) 其它名稱:ADL5561ACPZ-R7CT |
| ADA4932-1YCPZ-R71 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Power Differential ADC Driver |
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