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Analog Devices - Differential ADC Driver

Numéro de référence AD8139
Description Differential ADC Driver
Fabricant Analog Devices 
Logo Analog Devices 





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AD8139 fiche technique
Data Sheet
FEATURES
Fully differential
Low noise
2.25 nV/√Hz
2.1 pA/√Hz
Low harmonic distortion
98 dBc SFDR at 1 MHz
85 dBc SFDR at 5 MHz
72 dBc SFDR at 20 MHz
High speed
410 MHz, 3 dB BW (G = 1)
800 V/µs slew rate
45 ns settling time to 0.01%
69 dB output balance at 1 MHz
80 dB dc CMRR
Low offset: ±0.5 mV maximum
Low input offset current: 0.5 µA maximum
Differential input and output
Differential-to-differential or single-ended-to-differential
operation
Rail-to-rail output
Adjustable output common-mode voltage
Wide supply voltage range: 5 V to 12 V
Available in a small SOIC package and an 8-lead LFCSP
APPLICATIONS
ADC drivers to 18 bits
Single-ended-to-differential converters
Differential filters
Level shifters
Differential PCB drivers
Differential cable drivers
GENERAL DESCRIPTION
The AD8139 is an ultralow noise, high performance differential
amplifier with rail-to-rail output. With its low noise, high
SFDR, and wide bandwidth, it is an ideal choice for driving
analog-to-digital converters (ADCs) with resolutions to 18 bits.
The AD8139 is easy to apply, and its internal common-mode
feedback architecture allows its output common-mode voltage
to be controlled by the voltage applied to one pin. The internal
feedback loop also provides outstanding output balance as well
as suppression of even-order harmonic distortion products. Fully
differential and single-ended-to-differential gain configurations
are easily realized by the AD8139. Simple external feedback
networks consisting of four resistors determine the closed-loop
gain of the amplifier.
Rev. C
Document Feedback
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
Low Noise, Rail-to-Rail,
Differential ADC Driver
AD8139
FUNCTIONAL BLOCK DIAGRAMS
AD8139
–IN 1
VOCM 2
V+ 3
+OUT 4
8 +IN
7 NIC
6 V–
5 –OUT
NIC = NO INTERNAL CONNECTION.
Figure 1. 8-Lead SOIC
AD8139
TOP VIEW
(Not to Scale)
–IN 1
VOCM 2
V+ 3
+OUT 4
8 +IN
7 NIC
6 V–
5 –OUT
NIC = NO INTERNAL CONNECTION.
Figure 2. 8-Lead LFCSP
The AD8139 is manufactured on the proprietary Analog Devices,
Inc., second-generation XFCB process, enabling it to achieve low
levels of distortion with input voltage noise of only 2.25 nV/√Hz.
The AD8139 is available in an 8-lead SOIC package with an
exposed paddle (EP) on the underside of its body and a 3 mm ×
3 mm LFCSP. It is rated to operate over the temperature range
of −40°C to +125°C.
100
10
1
10 100 1k 10k 100k 1M 10M 100M 1G
FREQUENCY (Hz)
Figure 3. Input Voltage Noise vs. Frequency
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2004–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

PagesPages 27
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