TI ADS1261IRHBR

The ADS1260 and ADS1261 (ADS126x) are precision 40kSPS ΔΣ ADCs with an integrated PGA. These devices also include a precision voltage reference and internal fault monitors. These sensor-ready ADCs provide high-accuracy single-chip solutions for the most demanding measurements, including weigh scales and RTDs. These ADCs incorporate an input signal multiplexer, a low-noise PGA (with gains from 1 to 128), a 4th-order ΔΣ modulator, a precision voltage reference, and a programmable digital filter. The high-impedance PGA inputs (1GΩ) reduce measurement errors caused by sensor loading. The ADS1260 supports three differential inputs or five single-ended inputs. The ADS1261 supports five differential inputs or ten single-ended inputs. Integrated current sources simplify RTD measurements. The flexible digital filter can be programmed for single-cycle settling conversions while providing simultaneous 50Hz and 60Hz line cycle rejection. Signal and reference monitors, a temperature sensor, and CRC data validation enhance data reliability. The ADS126x are pin-compatible devices available in a 5mm×5mm VQFN package, rated for an operating temperature range of -40°C to +125°C.

• 24-bit high-precision ADC
• Offset drift: 1 nV/°C
• Gain drift: 0.5 ppm/°C
• Noise: 30 nVRMS (20SPS, Gain = 128)
• Linearity: 2 ppm
• CMOS PGA gain: 1 to 128
• Wide input voltage range: ±7mV to ±5V
• Data rate: 2.5SPS to 40kSPS
• 2.5V reference: 2 ppm/°C
• Simultaneous 50Hz and 60Hz rejection mode
• Single-cycle settling mode
• Signal and reference monitor
• 5V or ±2.5V supply
• Internal temperature sensor
• Cyclic Redundancy Check (CRC)
• Excitation current source
• Sensor burn-out current source
• Four general-purpose I/O (ADS1261)
• AC excitation for bridge sensors (ADS1261)
• 5mm×5mm VQFN package

• PLC analog input modules
• Weigh scale and strain gauge digital converters
• Temperature and pressure measurement
• Laboratory instrumentation and process analysis