The ADS1244 is a 24-bit delta-sigma analog-to-digital converter (A/D). It offers excellent performance and very low power consumption in an MSOP-10 package, making it ideal for high-resolution measurements, especially in portable and other space- and power-constrained systems.

A third-order delta-sigma modulator and digital filter form the basis of the A/D converter. The analog modulator has a ±5V differential input range. The digital filter rejects both 50Hz and 60Hz signals, settles completely within one cycle, and outputs data at 15 samples per second.

A simple 2-wire serial interface provides all necessary controls. Data retrieval, self-calibration and sleep mode handle a few simple waveforms. When only a single conversion is required, the ADS1244 can be shut down when idle between measurements (sleep mode), significantly reducing overall power consumption. Multiple ADS1244s can be connected together to form a simultaneous sampling multi-channel measurement system. The ADS1244 is designed to interface easily to microcontrollers such as the MSP430.

The ADS1244 supports 2.5V to 5.25V analog supplies and 1.8V to 3.6V digital supplies. Power is typically less than 270µW in normal operation and less than 1µW in sleep mode.

characteristic

●20-bit effective resolution ●Current consumption: 90μa ●Analog supply: 2.5v to 5.25v ●Digital supply: 1.8v to 3.6v ●●±5v differential input range 0.0002%_INL (TYP), 0.0008%_INL (MAX) ● Simple 2-wire serial interface ● Simultaneous 50 Hz and 60 Hz rejection ● Single conversion and sleep mode resolution ● ● Single loop self-checking ● Suitable for multi-channel systems ● Easy connection to MSP430

Production data information is current as of the date of publication. Product conforms to the specifications of Texas Instruments Standard Warranty. Production processing does not necessarily include testing of all parameters.