參數(shù)資料
型號: AD8432ACPZ-WP
廠商: Analog Devices Inc
文件頁數(shù): 17/32頁
文件大小: 0K
描述: IC AMP DUAL LN 24LFCSP
標準包裝: 64
放大器類型: 電壓反饋
電路數(shù): 2
輸出類型: 差分
轉(zhuǎn)換速率: 295 V/µs
-3db帶寬: 200MHz
電壓 - 輸入偏移: 1000µV
電流 - 電源: 24mA
電流 - 輸出 / 通道: 77mA
電壓 - 電源,單路/雙路(±): 4.5 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 24-WFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 24-LFCSP-WQ(4x4)
包裝: 托盤 - 晶粒
產(chǎn)品目錄頁面: 772 (CN2011-ZH PDF)
AD8432
Data Sheet
Rev. C | Page 24 of 32
DIFFERENTIAL-TO-SINGLE-ENDED CONVERSION
Some applications require the low noise and high dynamic
range of the AD8432; however, they may also require a single-
ended output, rather than a differential output. The AD8129
or AD8130 differential receiver amplifier can be used for the
differential-to-single-ended conversion of the AD8432 output,
as shown in Figure 72.
The AD8129 is a low noise, high gain (10 or greater) amplifier
intended for applications over very long cables, where signal
attenuation is significant. The AD8130 is stable at a gain of 1
and can be used for applications where lower gains are required.
The AD8129 and AD8130 have user-adjustable gain, set by the
ratio of two resistors, to help compensate for losses in the
transmission line.
A transformer or balun can also be used to convert the differential
output of the AD8432 to a single-ended output. Transformers
have lower distortion; however, care must be taken to properly
match the impedance of the transformer. The test circuit for
distortion measurements in Figure 58 uses an ADTT1-1
transformer to perform differential-to-single-ended conversion.
08341-
044
+
1
8
4
5
6
7
2
–VS
+VS
VOUT1
BIAS
INL1
IND1
INH1
ENB
VPS1
VPS2
COMM
OPH1
OPL1
LNA1
IN1
2
499Ω
2
RSH1
15Ω
CSH1
47pF
0.1F
GMH1
GOH1
GOL1
GML1
SERIES 20Ω
RESISTORS IF DRIVING
HIGH CAP LOAD
AC-COUPLING CAPS
(AD8432 HAS 2.5V
OUTPUT BIAS)
AD8130
499Ω RESISTORS PROVIDE
BIAS CURRENT PATH AND
TERMINATION IF NECESSARY
G = 12 dB
Figure 72. AD8432 Differential-to-Single-Ended Conversion Using the AD8129/AD8130 with Unity Gain
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