ADS1120QPWRQ1

The ADS1120-Q1 is a precision, 16-bit, analog-to-digital converter (ADC) that offers many integrated features to reduce system cost and component count in applications measuring small sensor signals. The device features two differential or four single-ended inputs through a flexible input multiplexer (MUX), a low-noise, programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, a low-side switch, and a precision temperature sensor. The device can perform conversions at data rates up to 2000 samples-per-second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50Hz and 60Hz rejection for noisy industrial applications. The internal PGA offers gains up to 128 V/V. This PGA makes the ADS1120-Q1 ideally-suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and bridge sensors. The device supports measurements of pseudo- or fully-differential signals when using the PGA. Alternatively, the device can be configured to bypass the internal PGA while still providing high input impedance and gains up to 4 V/V, allowing for single-ended measurements. Power consumption is as low as 120 μA when operating in duty-cycle mode with the PGA disabled. Communication to the device is established through a mode 1 SPI-compatible interface. The ADS1120-Q1 is offered in a TSSOP-16 package and is specified over a temperature range of -40°C to +125°C.

Applications

• Temperature Sensors: Thermocouples
• Resistance Temperature Detectors (RTDs): 2-, 3-, or 4-Wire Types
• Bridge Sensors:
• Pressure Sensors
• Strain Gauges
• Battery Voltage Measurements

Key features

• Qualified for Automotive Applications
• AEC-Q100 Qualified with the Following Results: Temperature Grade 1: -40°C to +125°C HBM ESD Classification 2 CDM ESD Classification C4B
• Low Current Consumption: As Low as 120 μA (typ) in Duty-Cycle Mode
• Wide Supply Range: 2.3V to 5.5V
• Programmable Gain: 1 V/V to 128 V/V
• Programmable Data Rates: 5 SPS to 2 kSPS
• 16-Bit, Noise-Free Resolution at 20 SPS
• Simultaneous 50Hz and 60Hz Rejection at 20 SPS with Single-Cycle Settling Digital Filter
• Two Differential or Four Single-Ended Inputs
• Dual-Matched Programmable Current Sources: 50 μA to 1.5 mA
• Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
• Internal 2% Accurate Oscillator
• Internal Temperature Sensor: 0.5°C (typ) Accuracy
• SPI-Compatible Interface (Mode 1)