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Features and Benefits

  • High resolution analog-to-digital converter (ADC)
    24 bits no missing codes
    ±0.0025% nonlinearity
  • Optimized for fast channel switching
    18-bit p-p resolution (21 bits effective) at 500 Hz
    16-bit p-p resolution (19 bits effective) at 2 kHz
    14-bit p-p resolution (18 bits effective) at 15 kHz
    On-chip per channel system calibration
  • 4 single-ended analog inputs
    Input ranges +5 V, ±5 V, +10 V, ±10 V
    Overvoltage tolerant
    Up to ±16.5 V not affecting adjacent channel
    Up to ±50 V absolute maximum
  • See data sheet for additional features

Product Details

The AD7734 is a high precision, high throughput analog front end. True 16-bit p-p resolution is achievable with a total conversion time of 500 μs (2 kHz channel switching), making it ideally suitable for high resolution multiplexing applications.

The device can be configured via a simple digital interface, which allows users to balance the noise performance against data throughput up to a 15.4 kHz.

The analog front end features four single-ended input channels with unipolar or true bipolar input ranges to ±10 V while operating from a single +5 V analog supply. The device has an overrange and underrange detection capability and accepts an analog input overvoltage to ±16.5 V without degrading the performance of the adjacent channels.

The differential reference input features “No-Reference” detect capability. The ADC also supports per channel system calibration options. The digital serial interface can be configured for 3-wire operation and is compatible with microcontrollers and digital signal processors. All interface inputs are Schmitt triggered.

The device is specified for operation over the extended industrial temperature range of –40°C to +105°C.

Other devices in the AD7734 family are the AD7732 and the AD7738.

The AD7732 is similar to AD7734, but its analog front end features two fully differential input channels.

The AD7738 analog front end is configurable for four fully differential or eight single-ended input channels, features 0.625 V to 2.5 V bipolar/unipolar input ranges, and accepts a common-mode input voltage from 200 mV to AVDD–300 mV. The AD7738 multiplexer output is pinned out externally, allowing the user to implement programmable gain or signal conditioning before being applied to the ADC.


  • PLCs/DCS
  • Multiplexing applications
  • Process control
  • Industrial instrumentation

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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Sigma-Delta ADC Tutorial

An interactive illustration showing the behavior of an idealized sigma-delta A/D converter.

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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.