參數(shù)資料
型號(hào)： AD8432-EVALZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 17/32頁(yè)
文件大?。?/td> 0K
描述： BOARD EVALUATION FOR AD8432
標(biāo)準(zhǔn)包裝： 1
每 IC 通道數(shù)： 2 - 雙
放大器類型： 電壓反饋
輸出類型： 差分
轉(zhuǎn)換速率： 295 V/µs
-3db帶寬： 200MHz
電流 - 輸出 / 通道： 77mA
工作溫度： -40°C ~ 85°C
電流供應(yīng)（主 IC）： 24mA
電壓 - 電源，單路/雙路(±)： 4.5 V ~ 5.5 V
板類型： 完全填充
已供物品： 板
已用 IC / 零件： AD8432
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
0Ω
499Ω
2
0Ω
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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