AD7739 8-Channel, 4 kHz, 24-Bit Sigma-Delta A/D Converter

The AD7739 is a high precision, high throughput analog front end. True 16-bit peak-to-peak resolution is achievable with a total conversion time of 250 µs (4 kHz channel switching) making it ideally suitable for high resolution multiplexing applications.

The AD7739 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 15.4 kHz conversion rate. The analog front end features 8 single-ended or 4 fully differential input channels with unipolar or bipolar 625 mV, 1.25 V and 2.5 V input ranges and accepts a common mode input voltage from 200 mV above AGND to AVDD-300 mV. The ADC supports 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 24-lead TSSOP package.

Features and Benefits
  • High resolution ADC
    - 24 bits no missing codes
    - ±0.0015% Nonlinearity
  • Optimized for Fast Channel Switching
    - 18-Bits p-p Resolution (21 Bits Effective) at 500 Hz
    - 16-Bits p-p Resolution (19 Bits Effective) at 4 kHz
    - On-Chip Per Channel System Calibration
  • Configurable Inputs 8 Single-Ended or 4 Fully Differential
  • Input Ranges
    - +625 mV, ±625 mV, +1.25 V, ±1.25 V, +2.5 V, ±2.5 V
  • 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: 24-Lead TSSOP
Analog to Digital Converters
Software & Systems Requirements
Data Sheets
Documentnote
AD7739: 8-Channel,High Throughput, 24-Bit Sigma-Delta ADC Data Sheet (Rev. A)PDF 380 kB
Application Notes
Documentnote
AN-607: Selecting a Low Bandwidth (<15 kSPS) Sigma-Delta ADC (Rev. E)PDF 222 kB
AN-663: AD7732/AD7734/AD7738/AD7739 Calibration Registers (Rev. 0)PDF 96 kB
AN-664: AD7732/AD7734/AD7738/AD7739 in Low Power Applications (Rev. 0)PDF 131 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD7739BRU Last Time Buy24 ld TSSOPOTH 62-40 to 105C10.528.95N
AD7739BRUZ Production24 ld TSSOPOTH 62-40 to 105C9.117.74Y
AD7739BRUZ-REEL7 Production24 ld TSSOPREEL 1000-40 to 105C07.74Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-AD7739EBZEvaluation Board59Y
Reference Materials
AD7739: 8-Channel,High Throughput, 24-Bit Sigma-Delta ADC Data Sheet (Rev. A) ad7739
AD7732/4/8/9 Evaluation Software ad7738
AN-607: 选择低带宽(<15kSPS)Σ-Δ型ADC (Rev. E) ad7701
AN-607: Selecting a Low Bandwidth (<15 kSPS) Sigma-Delta ADC (Rev. E) ad7701
AN-664: AD7732/AD7734/AD7738/AD7739的低功耗应用 (Rev. 0) ad7738
AN-663: AD7732/AD7734/AD7738/AD7739 Calibration Registers (Rev. 0) ad7738
AN-664: AD7732/AD7734/AD7738/AD7739 in Low Power Applications (Rev. 0) ad7738
MS-2210：高速ADC的电源设计 ad9861
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