AD8139 Low Noise, Rail-to-Rail, Differential ADC Driver
Product Details
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.
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.
Applications
- ADC drivers to 18 bits
- Single-ended-to-differential converters
- Differential filters
- Level shifters
- Differential PCB drivers
- Differential cable drivers
Features and Benefits
- 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