製品概要

機能と利点

  • Easy to use, single-ended-to-differential conversion
  • Adjustable output common-mode voltage
  • Externally adjustable gain
  • Low harmonic distortion
    -94 dBc SFDR @ 5 MHz
    -85 dBc SFDR @ 20 MHz
  • -3 dB bandwidth of 320 MHz, G = +1
  • Fast settling to 0.01% of 16 ns
  • Slew rate 1150 V/µs typical
  • Fast overdrive recovery
  • Low input voltage noise
  • 1 mV typical offset voltage
  • Wide supply range +3 V to ±5 V
  • Low power

製品概要

The AD8138 is a major advancement over op amps for differential signal processing. The AD8138 can be used as a single-ended-to-differential amplifier or as a differential-to-differential amplifier. The AD8138 is as easy to use as an op amp, and greatly simplifies differential signal amplification and driving. Manufactured on ADI's proprietary XFCB bipolar process, the AD8138 has a -3 dB bandwidth of 320 MHz and delivers a differential signal with the lowest harmonic distortion available in a differential amplifier. The AD8138 has a unique internal feedback feature that provides balanced output gain and phase matching, suppressing even order harmonics. The internal feedback circuit also minimizes any gain error that would be associated with the mismatches in the external gain setting resistors.

The AD8138's differential output helps balance the input to differential ADCs, maximizing the performance of the ADC. The AD8138 eliminates the need for a transformer with high performance ADCs, preserving the low frequency and dc information. The common-mode level of the differential output is adjustable by a voltage on the VOCMpin, easily level-shifting the input signals for driving single supply ADCs. Fast overload recovery preserves sampling accuracy.

The AD8138 distortion performance makes it an ideal ADC driver for communication systems, with distortion performance good enough to drive state-of-the-art 10-bit to 16-bit converters at high frequencies. The AD8138's high bandwidth and IP3 also make it appropriate for use as a gain block in IF and baseband signal chains. The AD8138 offset and dynamic performance make it well suited for a wide variety of signal processing and data acquisition applications.

製品ライフサイクル icon-recommended 製造中

この製品ファミリーの1つ以上の型番が生産/供給中です。新規の設計に適していますが、より新しい代替製品を提供している場合があります。

ツール

Sys-Parameters

Sys-Parameter Models for Keysight Genesys

Sys-Parameter models contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.

設計ツール

ADIsimRF

アナログ・デバイセズのADIsimRF設計ツールは、カスケード・ゲインやノイズ指数、IP3、P1dB、総合消費電力などRFシグナル・チェーン内の最も重要なパラメータの計算を行います。

設計リソース

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

ディスカッション

AD8138S Discussions

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