AD7732:  2-Channel, ±10 V Input Range, 24-Bit Sigma-Delta A/D Converter

The AD7732 is a high precision, high throughput analog front end. True 16-bit peak-to-peak resolution is achievable with total conversion times of 500 µs (2 kHz channel switching) making it ideally ...More

AD7732:  2-Channel, ±10 V Input Range, 24-Bit Sigma-Delta A/D Converter

Product Description

The AD7732 is a high precision, high throughput analog front end. True 16-bit peak-to-peak resolution is achievable with total conversion times of 500 µs (2 kHz channel switching) making it ideally suitable for high resolution multiplexing applications.

The AD7732 is based on a sigma-delta architecture and features up to 24 bits of no missing codes performance. The part can be configured via a simple digital interface, which allows users to balance the noise performance against data throughput up to a 12.3 kHz conversion rate. The analog front end features 2 fully differential input channels with unipolar or true bipolar input ranges to ±10 V while operating from a single 5 V analog supply. The part has an over-range and under-range detection capability and accepts an analog input over-voltage to ±16.5 V not degrading the performance of the adjacent channels. The differential reference input features “No Reference” detect capability.

The AD7732 contains self-calibration and per channel system calibration options. The digital serial interface can be configured for three wire operation and is compatible with microcontrollers and digital signal processors. All interface inputs are Schmitt triggered.

The part is specified for operation over the extended industrial temperature range of –40ºC to +105ºC and is available in 28-lead TSSOP package.

Features

  • High resolution ADC
    - 24 bits no missing codes
    - ±0.0015% nonlinearity
  • 3-wire serial interface
    - SPI®, QSPI™, MICROWIRE™, and DSP compatible
    - Schmitt trigger on logic inputs
  • Single-supply operation
    - 5 V analog supply
    - 3 V or 5 V digital supply
  • Package: 28-lead TSSOP
  • 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
  • 2 fully differential 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

Diagrams

AD7732 Diagram
Functional Block Diagram for AD7732

Specifications

Resolution (Bits) 24bit
T-Put Rate 15.4kSPS
# Chan 2
Supply V Single(+5)
Pwr Diss 100mW
Interface Ser,SPI
Ain Range Bip 10V,Bip 5.0V,Uni 10V,Uni 5.0V
SNR (dB) n/a
Pkg Type SOP

AD7949 - 14-Bit, 8-Channel, 250 kSPS PulSAR® ADC

AD7357 - Differential Input, Dual, Simultaneous Sampling, 4.25 MSPS, 14-Bit, SAR ADC

AD7780 - 24-Bit Pin-Programmable Low Power Σ−Δ ADC

AD7781 - 20-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC

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Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD1555 24 16KSPS 2 96mW
AD7732 24 15.4KSPS 2 100mW
AD7766 24 128KSPS 1 18mW
AD7767 24 128KSPS 1 18mW
AD9874 24 541.5KSPS 1 79.5mW
AD7734 24 15.4KSPS 4 100mW
AD7738 24 15.4KSPS 8 100mW
AD7357 14 4.25MSPS 2 36mW
AD9251-20 14 20MSPS 2 95mW
AD7367-5 14 500KSPS 2 54.5mW
AD7887 12 125KSPS 2 3.5mW
Pricing, Packaging & Availability

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Package Description
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For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
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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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

*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.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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