TEXAS Instruments has introduced a pair of 32-bit delta-sigma analogue-to-digital converters that promise high accuracy, low noise and high integration for industrial uses.
The sensor-ready ADS1262 and ADS1263 ADCs are suited for use in programmable logic controllers (PLCs), industrial automation and sensor measurement. They eliminate many of the performance and features trade-offs typically associated with device evaluation and selection, and also remove the need for external components that increase system cost and degrade noise and drift performance.
Until now, system designers who needed a high-resolution ADC had to sacrifice other desired specifications, such as low noise or low offset drift, as well as several integrated features. The ADS1262 and ADS1263 eliminate these trade-offs by providing 32-bit resolution, along with integration, fault-detection features, a fast data rate and wide temperature range.
Key features and benefits of the ADS1262 and ADS1263
- Accurate measurements of small signals: High resolution of 32 bits and low noise of 7 nVRMS at 2.5 SPS enable measurement of the smallest signals, which is essential for bridge applications where typical full-scale signals are 10 mV or less. Offset error drift is also 80 percent lower than competitive solutions, ensuring measurement stability over the entire temperature range.
- Reduces component count to decrease system cost, board area and design time: The ADS1262 integrates a programmable gain amplifier (PGA), 2.5-V reference, oscillator, level shifter, temperature sensor, dual-excitation current sources (IDACs) and eight general-purpose input/output (GPIO) pins. The ADS1263 adds an auxiliary 24-bit delta-sigma ADC for systems needing parallel main-channel conversions, sensor-temperature compensation or sensor diagnostics.
- Integrated monitoring and diagnostics: Features such as internal signal-chain monitoring, data-error detection, sensor-burnout detection and a test digital-to-analog converter (DAC) provide the internal and external fault detection and diagnostics necessary for high-reliability systems. Read TI’s new white paper to learn how to use the ADS1262 and ADS1263’s integrated diagnostics to help improve system reliability.
- Fast data rate: A maximum output data rate of 38 kSPS enables the ADCs to be used in high-data-throughput industrial applications.
- Support for harsh industrial environments: The operating temperature range of -40°C to +125C is 20C wider than competing products.