ADS1120-Q1 Automotive 16-bit 2-kSPS 4-ch low-power delta-sigma ADC with PGA and VREF for small signal sensors | TI.com

ADS1120-Q1 (ACTIVE) Automotive 16-bit 2-kSPS 4-ch low-power delta-sigma ADC with PGA and VREF for small signal sensors

 

Special note

For evaluation purposes, please see the commercial grade evaluation module ADS1120EVM

Description

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 50-Hz and 60-Hz 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.

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: 2.3 V to 5.5 V
  • 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 50-Hz and 60-Hz 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)

Parametrics

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Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) INL (Max) (+/-LSB) Rating
ADS1120-Q1 Order now 16     2     4     SPI     -40 to 125     TSSOP | 16     3.72 | 1ku     1.4     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Differential
Single-Ended    
Multiplexed     Ext
Int
Supply    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
Oscillator
PGA
Temp Sensor    
2.85
5.6    
-2.85
0    
2.3     5.5     2.3     5.5     1.3     Automotive    
ADS1013-Q1 Order now 12     3.3     1     I2C     -40 to 125     VSSOP | 10     1.12 | 1ku     0.3     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)     Delta-Sigma     Differential
Single-Ended    
    Int     Oscillator     5.5     0     2     5.5     2     5.5     0.5     Automotive    
ADS1014-Q1 Order now 12     3.3     1     I2C     -40 to 125     VSSOP | 10     1.24 | 1ku     0.3     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)     Delta-Sigma     Differential
Single-Ended    
    Int     Oscillator     5.5     0     2     5.5     2     5.5     0.5     Automotive    
ADS1015-Q1 Order now 12     3.3     4     I2C     -40 to 125     VSSOP | 10     1.36 | 1ku     0.9     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)     Delta-Sigma     Differential
Single-Ended    
Multiplexed     Int     Comparator
Oscillator
PGA