AD8138
PRODUCTIONLow Distortion Differential ADC Driver
- Part Models
- 8
- 1ku List Price
- Starting From $5.30
Part Details
- Easy to use, single-ended-to-differential conversion
- Adjustable output common-mode voltage
- Externally adjustable gain
- Low harmonic distortion
-94 dBc SFDR at 5 MHz
-85 dBc SFDR at 20 MHz - -3 dB bandwidth of 320 MHz, G = +1
- Fast settling to 0.01% of 16 ns
- Slew rate 1150 V/µs
- Fast overdrive recovery of 4 ns
- Low input voltage noise of 5 nV/√Hz
- See data sheet for additional features
- Download AD8138-EP data sheet (pdf)
- Extended temperature range: −55ºC to +105°C
- Controlled manufacturing baseline
- One assembly/test site
- One fabrication site
- Enhanced product change notification
- Qualification data available on request
- V62/12665-01XE DSCC Drawing Number
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 the proprietary ADI 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 differential output of the AD8138 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 VOCM pin, 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 high bandwidth and IP3 of the AD8138 also make it appropriate for use as a gain block in IF and baseband signal chains. The AD8138 offset and dynamic performance makes it well suited for a wide variety of signal processing and data acquisition applications.
The AD8138 is available in both SOIC and MSOP packages for operation over −40°C to +85°C temperatures.
The AD8138-EP supports defense and aerospace applications (AQEC).
Documentation
Data Sheet 3
User Guide 2
Application Note 8
Technical Articles 2
Tutorial 4
Product Selection Guide 1
Rarely Asked Question Page 1
Analog Dialogue 3
Webcast 2
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. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD8138ACHIPS | None Available | ||
| AD8138ARMZ | 8-Lead MSOP | ||
| AD8138ARMZ-REEL | 8-Lead MSOP | ||
| AD8138ARMZ-REEL7 | 8-Lead MSOP | ||
| AD8138ARZ | 8-Lead SOIC | ||
| AD8138ARZ-R7 | 8-Lead SOIC | ||
| AD8138ARZ-RL | 8-Lead SOIC | ||
| AD8138SRMZ-EP-R7 | 8-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
| No Match Found | ||
|
Mar 16, 2020 - 20_0158 Change of Waffle Pack for AD8138A |
||
| AD8138ACHIPS | PRODUCTION | |
|
May 15, 2012 - 10_0006 Halogen Free Material Change for mini SOIC Products |
||
| AD8138ARMZ | PRODUCTION | |
| AD8138ARMZ-REEL | PRODUCTION | |
| AD8138ARMZ-REEL7 | PRODUCTION | |
| AD8138SRMZ-EP-R7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| ADA4932-1 | RECOMMENDED FOR NEW DESIGNS | Low Power Differential ADC Driver |
Tools & Simulations
Precision ADC Driver Tool
The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input
Open ToolSPICE Model 1
ADI DiffAmpCalc™
ADI's new ADI DiffAmpCalc™ is a free, downloadable calculator for designing differential amplifier circuits. The tool is easy to use and features an interactive user interface to quickly get you up and running.
Open ToolADIsimRF
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
Open ToolSignal Chain Designer - BETA
Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.
Open ToolSys-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.
Open ToolEvaluation Kits
Universal Evaluation Board for Single Differential Amplifiers