ADS1262 - 32-bit 38kSPS 10-ch delta-sigma ADC with PGA and voltage reference for factory automation

The ADS1262 and ADS1263 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.

• 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 nV_RMS (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 Input/Outputs