ADS1262 32-bit Precision Delta-Sigma ADC

Specifications

Product Overview

The ADS1262 is a Texas Instruments 32-bit precision delta-sigma ADC in the Signal Chain category. Its main precision ADC uses a delta-sigma architecture with programmable data rates from 2.5 SPS to 38400 SPS, including a maximum data rate of 38.4 kSPS for the ADS1262 main ADC.

The differential input front end includes an integrated low-noise CMOS PGA with gain settings from 1 to 32. Extracted performance parameters include 1 nV/degC offset drift, 0.5 ppm/degC gain drift, 7 nV RMS noise at 2.5 SPS and gain = 32, and 3 ppm linearity. The device also includes a 2.5 V internal voltage reference with 2 ppm/degC reference temperature drift.

System functions include 11 multifunction analog inputs, 8 general-purpose inputs/outputs, dual sensor excitation current sources suitable for direct RTD measurement, internal fault monitors, and an internal ADC test signal. The package is TSSOP (28), with a 28-pin body size of 9.70 mm x 4.40 mm nominal, and operation is fully specified from -40 degC to +125 degC.

Key Features

• 32-bit main precision delta-sigma ADC
• Programmable 2.5 SPS to 38400 SPS data rates
• Integrated CMOS PGA with gain from 1 to 32
• 11 multifunction analog inputs with differential input front end
• 7 nV RMS noise at 2.5 SPS, gain 32
• 2.5 V internal reference with 2 ppm/degC drift
• 130 dB rejection of 50-Hz and 60-Hz interference
• Single-cycle settled conversions from the digital filter
• Dual sensor excitation current sources for direct RTD measurement
• Internal fault monitors and internal ADC test signal
• 8 general-purpose inputs and outputs
• Fully specified from -40 degC to +125 degC

Typical Applications

• Direct RTD measurement
• Differential sensor signal acquisition
• Low-noise precision conversion
• Line-cycle interference rejection
• Background measurements with ADS1263 auxiliary ADC
• ADC conversion noise evaluation
• Signal-chain measurement systems

Procurement Notes

When requesting a quote for ADS1262, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.

If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.

For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.