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 lownoise,

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, highaccuracy,

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 frontend

(AFE) incorporates two sensor-excitation current

sources suitable for direct RTD measurement.

A single-cycle settling digital filter maximizes multipleinput

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.