AD8137 Analog Devices Data Handbook/Manual

Low Cost, Low Power 12-Bit Differential ADC Driver

AD8137

FEATURES FUNCTIONAL BLOCK DIAGRAM Fully differential

AD8137

Extremely low power with power-down feature –IN +IN8

2.6 m A quiescent supply current @ 5 V VOCM PD7

450 µA in power-down mode @ 5 V VS+ VS–6 High speed

+OUT –OUT5

110 MHz large signal 3 d B bandwidth @ G = 1

Figure 1.

450 V/µs slew rate 12-bit SFDR performance @ 500 k Hz Fast settling time: 100 ns to 0.02% Low input offset voltage: ±2.6 m V max

Low input offset current: 0.45 µA max Differential input and output

Differential-to-differential or single-ended-to-differential G = 5

operation –3 Rail-to-rail output –4

Adjustable output common-mode voltage

LI ZE G = 10 LO SE -L IN (d

Externally adjustable gain

Wide supply voltage range: 2.7 V to 12 V –8

Available in small SOIC package –9 –10 RG = 1kΩ

APPLICATIONS –11 VO, dm = 0.1V p-p

www.BDTIC.com/ADI –12 12-bit ADC drivers 0.1

FREQUENCY (MHz)

Portable instrumentation

Figure 2. Small Signal Response for Various Gains

Battery-powered applications Single-ended-to-differential converters Differential active filters Video amplifiers Level shifters

GENERAL DESCRIPTON 1- 0-

The AD8137 is a low cost differential driver with a rail-to-rail The AD8137 is manufactured on Analog Devices’ proprietary output that is ideal for driving 12-bit ADCs in systems that are second generation XFCB process, enabling it to achieve high sensitive to power and cost. The AD8137 is easy to apply, and its levels of performance with very low power consumption.

internal common-mode feedback architecture allows its output

The AD8137 is available in the small 8-lead SOIC package and

common-mode voltage to be controlled by the voltage applied

3 mm × 3 mm LFCSP. It is rated to operate over the extended

to one pin. The internal feedback loop also provides inherently

industrial temperature range of −40°C to +125°C.

balanced outputs as well as suppression of even-order harmonic distortion products. Fully differential and single-ended-to- differential gain configurations are easily realized by the AD8137. External feedback networks consisting of four resistors determine the amplifier’s closed-loop gain. The power-down feature is beneficial in critical low power applications.

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.

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