ADS125H02 - 24-bit, 40kSPS, 2-ch delta-sigma ADC with ±10V high-voltage input, PGA, 2x IDACs, and low-drift Vref

The ADS125H01 and ADS125H02 (ADS125H0x) are 2-channel, 24-bit, 40-kSPS, delta-sigma (ΔΣ)ADCs with an integrated ±18-V programmable gain amplifier (PGA). The devices also include a voltagereference and features to enhance data reliability such as CRC and signal monitors. The ADCsprovide a complete, high-resolution measurement solution over a wide range of common-mode voltage,with differential input voltage ranges from ±7 mV to ±20 V.

The ADCs are comprised of an ±18-V PGA providing gain of 0.125 to 128, a 24-bit ΔΣmodulator, programmable digital filter, and an internal reference.

The PGA inputs are high-impedance (1 GΩ) and accommodate high common-mode voltages withno external attenuation required. The devices support 1 differential or 2 single-endedinputs.

The flexible digital filter is programmable for single-cycle settled conversions whileproviding simultaneous 50-Hz and 60-Hz line cycle rejection.

Signal and reference monitors, a temperature sensor, and CRC data verification enhancedata reliability.

The ADS125H01 and ADS125H02 are pin compatible. The devices are available in a 5-mm ×5-mm VQFN package and are specified over the –40°C to +125°C temperature range.

• Precision, Wide-Input Range, 24-Bit ΔΣ ADC
• Differential Input Voltage Range: ±7 mV to ±20 V
• Absolute Input Voltage Range: ±15.5 V
• High Impedance PGA: 1 GΩ
• PGA Gain: 0.125 to 128
• High Accuracy:
  • Offset Drift: 5 nV/°C
  • Gain Drift: 1 ppm/°C
  • Linearity: 2 ppm
• Data Rate: 2.5 to 40000 SPS
• 2.5-V Reference
• Simultaneous 50-Hz and 60-Hz Rejection Mode
• Single-Cycle Settling Mode
• Signal and Reference Voltage Monitors
• Cyclic Redundancy Check (CRC)
• Two Reference Inputs (H02)
• Sensor Excitation Current Sources (H02)
• Four General-Purpose Inputs/Outputs (H02)
• 5-mm × 5-mm VQFN Package

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