Highly-integrated low-noise low-drift 38.4-kSPS delta-sigma ADCs
05-10-2015 |
Texas Instruments
|
Semiconductors
The new ADS1262 and ADS1263, from Texas Instruments (TI), are low-noise,
low-drift, 38.4-kSPS, delta-sigma (?S) ADCs with an integrated PGA,
reference, and internal fault monitors. The ADS1263 integrates an auxiliary,
24-bit, ?S ADC intended for background measurements. The sensor-ready ADCs
provide complete, high-accuracy, one-chip measurement solutions for the
most-demanding sensor applications, including weigh scales, strain-gauge
sensors, thermocouples, and resistance temperature devices (RTD).
The ADCs are comprised of a low-noise, CMOS PGA (gains 1 to 32), a ?S
modulator, followed by a programmable digital filter. The flexible analog
front-end (AFE) incorporates two sensor-excitation current sources suitable
for direct RTD measurement.
A single-cycle settling digital filter maximizes multiple-input conversion
throughput, while providing 130dB rejection of 50Hz and 60-Hz line cycle
interference.
The ADS1262 and ADS1263 are pin and functional compatible. These devices are
available in a 28-pin TSSOP package and are fully specified over the -40C to
+125C temperature range.