ADS1262EVM-PDK

EVAL BOARD FOR ADS1262

1 Features

• Precision, 32-bit, ΔΣ ADC

• Auxiliary 24-bit, ΔΣ ADC (ADS1263)

• Data rates: 2.5 SPS to 38400 SPS

• Differential input, CMOS PGA

• 11 multifunction analog inputs

• High-accuracy architecture:

– Offset drift: 1 nV/°C

– Gain drift: 0.5 ppm/°C

– Noise: 7 nVRMS (2.5 SPS, gain = 32)

– Linearity: 3 ppm

• 2.5-V internal voltage reference:

– Temperature drift: 2 ppm/°C

• 50-Hz and 60-Hz rejection

• Single-cycle settled conversions

• Dual sensor excitation current sources

• Internal fault monitors

• Internal ADC test signal

• 8 general-purpose inputs/outputs

2 Applications

• Factory automation and control:

–Analog input modules

–Temperature controllers

–Weigh modules

• Instrumentation:

–Process analytics

–Lab and field instrumentation

–Weigh scales

3 Description

The ADS1262 and ADS1263 (ADS126x) are low noise, low-drift, 38.4-kSPS, delta-sigma (ΔΣ) ADCs with an integrated PGA, reference, and internal fault monitors. The ADS1263 integrates an auxiliary, 24 bit, ΔΣ 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 ΔΣ 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 130-dB rejection of 50-Hz 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–40°C to +125°C temperature range.