ADS7142 12-bit 140-kSPS 2-ch nanopower SAR ADC with 1.8-V operation in 1.5-mm x 2-mm QFN package | TI.com

ADS7142 (ACTIVE) 12-bit 140-kSPS 2-ch nanopower SAR ADC with 1.8-V operation in 1.5-mm x 2-mm QFN package

 

Automotive AEC-Q100 Grade 1 qualified version available, see ADS7142-Q1.

Description

The ADS7142 autonomously monitors signals while optimizing system power, reliability, and performance. It implements event-triggered interrupts per channel using a digital windowed comparator with programmable high and low thresholds, hysteresis, and event counter. The device includes a dual-channel analog multiplexer in front of a successive approximation register analog-to-digital converter (SAR ADC) followed by an internal data buffer for converting and capturing data from sensors.

The ADS7142 is available in 10-pin QFN package and consumes only 900 nW of power. The small form-factor and low power consumption make this device suitable for space-constrained and/or battery-powered applications.

Features

  • Standalone, Nanopower Sensor Monitor for
    Cost-sensitive Designs
  • Small Package Size: 1.5 mm x 2 mm
  • Efficient Host Sleep and Wake-up
    • Autonomous Monitoring at 900 nW
    • Windowed Comparator for Event-triggered Host Wake-up
    • Data Buffering during Host Sleep
  • Independent Sensor Configuration and Calibration
    • Dual-Channel, Pseudo-Differential, or Ground-Sense Input Configuration
    • Programmable Thresholds for Calibration
    • Internal Calibration improves Offset and Drift
  • False Trigger Prevention
    • Programmable Thresholds per Channel
    • Programmable Hysteresis for Noise Immunity
    • Event Counter for Transient Rejection
  • Deep Data Analysis
    • Data Buffer for Fault Diagnostics
    • High Precision Mode for 16-bit Accuracy
    • One-Shot Mode for Fast Data Capture
  • I2C™ Interface
    • Compatible from 1.65 V to 3.6 V
    • 8 Configurable Addresses
    • Up to 3.4 MHz (High Speed)
  • Wide Operating Range
    • Analog Supply: 1.65 V to 3.6 V
    • Temperature Range: –40°C to 125°C

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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) SNR (dB) THD (Typ) (dB) Rating
ADS7142 Order now 12     140     2     I2C     -40 to 125     X2QFN | 10     0.85 | 1ku     0.0009     10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)     SAR     Pseudo-Differential
Single-Ended    
Multiplexed     Supply     Comparator
Oscillator
Small Size    
3.6     0     1.65     3.6     1.65     3.6     1     71.5     -80     Catalog    
ADS7056 Order now 14     2500     1     SPI     -40 to 125     X2QFN | 8     2.00 | 1ku     3.5     8X2QFN: 2 mm2: 1.5 x 1.5 (X2QFN | 8)     SAR     Single-Ended         Supply     Small Size     3.6     0     2.35     3.6     1.65     3.6     3     74.9     -85     Catalog    
ADS7828 Order now 12     50     8     I2C     -40 to 85     TSSOP | 16     3.58 | 1ku     0.675     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     SAR     Pseudo-Differential
Single-Ended    
Multiplexed     Ext
Int    
    5.25     0     2.7     5.25     2.7     5.25     1     72     -82     Catalog    
ADS7924 Order now 12     100     4