參數(shù)資料
型號(hào): AD9631ARZ-REEL7
廠商: Analog Devices Inc
文件頁數(shù): 10/20頁
文件大小: 0K
描述: IC OPAMP VF ULDIST 70MA 8SOIC
標(biāo)準(zhǔn)包裝: 750
放大器類型: 電壓反饋
電路數(shù): 1
轉(zhuǎn)換速率: 1300 V/µs
-3db帶寬: 320MHz
電流 - 輸入偏壓: 2µA
電壓 - 輸入偏移: 3000µV
電流 - 電源: 17mA
電流 - 輸出 / 通道: 70mA
電壓 - 電源,單路/雙路(±): 6 V ~ 12 V,±3 V ~ 6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SO
包裝: 帶卷 (TR)
AD9631/AD9632
Data Sheet
Rev. D | Page 18 of 20
ANALOG-TO-DIGITAL CONVERTER (ADC) DRIVER
As ADCs move toward higher speeds with higher resolutions,
there becomes a need for high performance drivers that will not
degrade the analog signal to the converter. It is desirable from a
system’s standpoint that the ADC be the element in the signal
chain that ultimately limits overall distortion. Figure 66 is such
an example.
Figure 66. AD9631 Used as Driver for an ADC Signal Chain
LAYOUT CONSIDERATIONS
The specified high speed performance of the AD9631/AD9632
requires careful attention to board layout and component
selection. Proper RF design techniques and low-pass parasitic
component selection are mandatory.
The PCB should have a ground plane covering all unused
portions of the component side of the board to provide a low
impedance path. Remove the ground plane from the area near
the input pins to reduce stray capacitance.
Use chip capacitors for supply bypassing (see Figure 59 and
Figure 60). Connect one end to the ground plane, and the other
within 1/8 inch of each power pin. Connect an additional large
(0.47 μF to 10 μF) tantalum electrolytic capacitor in parallel,
though not necessarily so close, to supply current for fast, large
signal changes at the output.
The feedback resistor should be located close to the inverting
input pin to keep the stray capacitance at this node to a mini-
mum. Capacitance variations of less than 1 pF at the inverting
input will significantly affect high speed performance.
Use stripline design techniques for long signal traces (greater
than about 1 inch). These should be designed with a
characteristic impedance of 50 Ω or 75 Ω and be properly
terminated at each end.
00601-
066
+5V
–5V
130
140
ANALOG IN
AD9631
ADC
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