Overview

Features and Benefits

  • Optimized for ADC synchronization
  • Low power: 22 mW (±12 V supplies)
  • 12 binary gain steps from 1/16 V/V to 128 V/V
  • 3 scaling gains: 1 V/V, 1.25 V/V, and 1.375 V/V
  • ±60 V protected input multiplexer
  • Excellent dc precision
    • Low input offset voltage: ±14 μV maximum
    • Low input offset voltage drift: ±0.08 μV/°C maximum
    • Gain calibration via ROM
    • Low gain drift: ±1 ppm/°C maximum
    • High CMRR: 116 dB minimum, G = 1 V/V
  • Low input bias current: ±1.5 nA maximum
  • High input impedance
  • Integrated input EMI filtering
  • Wide input supply range: ±5 V to ±28 V
  • Dedicated output amplifier supplies
  • 7 GPIO ports with special functions
  • Sequential chip select mode
  • External multiplexer control
  • Excitation current sources
  • SPI port with checksum (CRC) support
  • Internal fault detection
  • Wire break test currents
  • On-chip test multiplexer
  • 28-lead, 5 mm × 5 mm LFCSP, 24-lead TSSOP
  • Specified temperature range: −40°C to +105°C

Product Details

The ADA4254 is a zero drift, high voltage, low power programmable gain instrumentation amplifier (PGIA) designed for process control and industrial applications. The ADA4254 features 12 binary weighted gains ranging from 1/16 V/V to 128 V/V and three scaling gain options of 1 V/V, 1.25 V/V, and 1.375 V/V, resulting in 36 possible gain settings. The power consumption of the ADA4254 is a mere 22 mW, making the device an excellent choice for industrial systems that demand precision, robustness, and low power.

The zero drift amplifier topology of the ADA4254 self calibrates dc errors and low frequency 1/f noise, achieving excellent dc precision over the entire specified temperature range. This high level of precision maximizes dynamic range and greatly reduces calibration requirements in many applications. 

The input multiplexer provides ±60 V protection to the high impedance inputs of the amplifier, while providing the capability to switch between two input sources. In addition, integrated electromagnetic interference (EMI) filters block harsh RF noise from the sensitive inputs of the amplifier. 

Various safety features on the ADA4254 detect both internal and external faults. The serial port interface (SPI) supports cyclical redundancy check (CRC) error detection to ensure robust communication. These safety features ease system safety integrity level (SIL) certification. 

Seven general-purpose input/output (GPIO) pins, which can be configured to provide various special functions, are included in the ADA4254. An excitation current source output is available to bias sensors such as resistance temperature detectors (RTDs). 

The ADA4254 is specified over the −40°C to +105°C temperature range and is offered in a compact 5 mm × 5 mm, 28-lead LFCSP and a 24-lead TSSOP. 

Applications

  • Universal process control front ends
  • Data acquisition systems
  • Test and measurement systems 

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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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.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.