TUCSON, Ariz. -- Texas Instruments Inc. today claimed unmatched integration and performance in a new 24-bit analog-to-digital converter that features an eight-channel multiplexer, programmable gain amplifier, input buffer, burn-out current sensor, dual independent current DACs, and other functions for measurement and control applications.
The 24-bit data converter, designated ADS1216, is the newest member of TI's Burr-Brown product series. The Dallas chip company acquired Burr-Brown in Tucson earlier this year to expand its analog and mixed-signal portfolio. TI said the ADS1216 is aimed at high-resolution measurement and control systems in industrial process control, portable instrumentation, smart transmitters, weigh scales and chromatography.
TI said the multiplexer for the ADS1216 supports eight input channels, which can be configured as differential pairs in any combination. This feature allows up to eight separate inputs to be connected and converted by the ADS1216, according to TI. Burn-out current sources are able to detect an open circuit or short circuit condition on the analog input. A selectable buffer can also be controlled through either a pin or software control.
Other features on the 24-bit ADC include on-chip voltage reference, external differential reference inputs, on-chip temperature sensor, programmable digital I/O, and a standard SPI serial interface. The delta-sigma ADC chip operates from 2.7 to 5.25 volts.
The converter's programmable gain amplifier provides for gains of up to 128 bits. The amplifier can also correct for analog offset voltages of up to one-half the full-scale range, allowing maximum utilization of the PGA function, said TI. Analog-to-digital conversion is accomplished with a second-order modulation and a fully-programmable sync filter.
The ADS1216 is available now and is housed in a TQFP-48 package. In quantities of 1,000 units, the converter is priced at $7.45 each.