AD8139

Features:

Fully differential
Low noise
2.25 nV/Hz
2.1 pA/z
Low harmonic distortion
98 dBc SFDR @ 1 MHz
85 dBc SFDR @ 5 MHz
72 dBc SFDR @ 20 MHz
High speed
410 MHz, 3 dB BW (G = 1)
800 V/s lew rate
45 ns settling time to 0.01%
69 dB output balance @ 1 MHz
80 dB dc CMRR
Low offset: 0.5 mV max
Low input offset current: 0.5 A max
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 small SOIC package




Application

ADC drivers to 18 bits
Single-ended-to-differential converters
Differential filters
Level shifters
Differential PCB board drivers
Differential cable drivers




Pinout








Specifications



ParameterRating
Supply Voltage 12 V

V_OCM ±V_S

Power Dissipation See Figure 3

Input Common-Mode Voltage ±V_S

Storage Temperature 65°C to +125°C

Operating Temperature Range 40°C to +125°C

Lead Temperature Range 300°C
(Soldering 10 sec)

Junction Temperature150°C





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 ADCs with resolutions to 18 bits. The AD8139 is easy to apply, and its in-ternal 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 out-standing 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 a total of four resistors determine the amplifiers closed-loop gain.

The AD8139 is manufactured on ADIs proprietary second gen-eration XFCB process, enabling it to achieve low levels of distor-tion with input voltage noise of only 1.85 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 o +125.