ADS1263( 32-Bit, Precision, 38-kSPS, ADC with PGA and Voltage Reference)IntroductionThe ADS1262 and ADS1263 are low-noise, low-drift,38.4kSPS, delta-sigma (Δ-Σ) ADCs with an integrated PGA, reference, and internal fault monitors. The ADS1263 integrates an auxiliary, 24-bit,Δ-Σ 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 Δ-Σ 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 -40°C to 125°C temperature range.FeaturePrecision, 32-bit,Δ-Σ ADCAuxiliary 24-Bit,Δ-Σ ADC (ADS1263)Data Rates: 2.5 SPS to 38400 SPSDifferential Input, CMOS PGA11 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 ppm2.5V Internal Voltage Reference – Temperature Drift: 2 ppm/°C50Hz and 60-Hz RejectionSingle-Cycle Settled ConversionsDual Sensor Excitation Current SourcesInternal Fault MonitorsInternal ADC Test Signal8 General-Purpose Input/OutputsAppearance
