參數(shù)資料
型號: AD8131ARZ
廠商: Analog Devices Inc
文件頁數(shù): 1/21頁
文件大?。?/td> 0K
描述: IC AMP DIFF LDIST 60MA 8SOIC
標(biāo)準(zhǔn)包裝: 98
放大器類型: 差分
電路數(shù): 1
輸出類型: 差分
轉(zhuǎn)換速率: 2000 V/µs
-3db帶寬: 400MHz
電流 - 輸入偏壓: 500nA
電壓 - 輸入偏移: 1500µV
電流 - 電源: 11.5mA
電流 - 輸出 / 通道: 60mA
電壓 - 電源,單路/雙路(±): 2.8 V ~ 11 V,±1.4 V ~ 5.5 V
工作溫度: -40°C ~ 125°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: 管件
產(chǎn)品目錄頁面: 765 (CN2011-ZH PDF)
Low Cost, High Speed
Differential Driver
AD8131
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2005 Analog Devices, Inc. All rights reserved.
FEATURES
High speed
400 MHz, 3 dB full power bandwidth
2000 V/μs slew rate
Fixed gain of 2 with no external components
Internal common-mode feedback to improve gain and phase
balance: 60 dB @ 10 MHz
Separate input to set the common-mode output voltage
Low distortion: 68 dB SFDR @ 5 MHz 200 Ω load
Power supply range +2.7 V to ±5 V
APPLICATIONS
Video line driver
Digital line driver
Low power differential ADC driver
Differential in/out level shifting
Single-ended input to differential output driver
FUNCTIONAL BLOCK DIAGRAM
NC = NO CONNECT
AD8131
1
2
3
45
6
7
8
750
Ω
750
Ω
1.5k
Ω
1.5k
Ω
–DIN
VOCM
V+
+OUT
+DIN
NC
V–
–OUT
01072-001
Figure 1.
GENERAL DESCRIPTION
The AD8131 is a differential or single-ended input to
differential output driver requiring no external components for
a fixed gain of 2. The AD8131 is a major advancement over op
amps for driving signals over long lines or for driving
differential input ADCs. The AD8131 has a unique internal
feedback feature that provides output gain and phase matching
that are balanced to 60 dB at 10 MHz, reducing radiated EMI
and suppressing harmonics. Manufactured on the Analog
Devices, Inc. next generation XFCB bipolar process, the
AD8131 has a 3 dB bandwidth of 400 MHz and delivers a
differential signal with very low harmonic distortion.
The AD8131 is a differential driver for the transmission of
high-speed signals over low-cost twisted pair or coax cables.
The AD8131 can be used for either analog or digital video
signals or for other high-speed data transmission. The AD8131
driver is capable of driving either Cat3 or Cat5 twisted pair or
coax with minimal line attenuation. The AD8131 has
considerable cost and performance improvements over discrete
line driver solutions.
The AD8131 can replace transformers in a variety of applications,
preserving low frequency and dc information. The AD8131 does
not have the susceptibility to magnetic interference and hysteresis
of transformers. It is smaller, easier to work with, and has the high
reliability associated with ICs.
–20
–30
–40
–50
–60
–70
–80
1
10
100
1000
BALANCE
E
RROR
(dB)
FREQUENCY (MHz)
ΔV
OUT, dm = 2V p-p
ΔV
OUT, cm/ΔVOUT, dm
VS = +5V
VS = ±5V
01072-002
Figure 2. Output Balance Error vs. Frequency
The AD8131’s differential output also helps balance the input
for differential ADCs, optimizing the distortion performance of
the ADCs. The common-mode level of the differential output is
adjustable by a voltage on the VOCM pin, easily level-shifting the
input signals for driving single-supply ADCs with dual supply
signals. Fast overload recovery preserves sampling accuracy.
The AD8131 is available in both SOIC and MSOP packages for
operation over 40°C to +125°C.
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