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 ...More
AD7739: 8-Channel, 4 kHz, 24-Bit Sigma-Delta A/D Converter
Product Description
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.
Design Tools
AD7732/34/38/39 Codeword Tool
A tool to calculate codewords from voltages in the AD7732/34/38/39 Sigma-De...
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Features
- 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
Diagrams
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- Symbols and Footprints
Functional Block Diagram for AD7739
8-Channel, 4 kHz, 24-Bit Sigma-Delta A/D Converter
Functional Block Diagram for AD7739
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