ADS7142 (ACTIVE)

Nanopower, Dual-Channel, Programmable Sensor Monitor

Nanopower, Dual-Channel, Programmable Sensor Monitor - ADS7142
 

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 Compare all products in Precision ADCs (<=10MSPS)

 
Resolution (Bits)
# Input Channels
Multi-Channel Configuration
Input Type
Power Consumption (Typ) (mW)
Input Range (Min) (V)
Input Range (Max) (V)
Interface
Features
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Architecture
Operating Temperature Range (C)
Pin/Package
THD (Typ) (dB)
SNR (dB)
Reference Mode
ADS7142 ADS7042 ADS7056 ADS7924 ADS7950
12
16   
12    14    12    12   
2    1    1    4    4   
Multiplexed    N/A    N/A    Multiplexed    Multiplexed   
Pseudo-Differential
Single-Ended   
Single-Ended    Single-Ended    Single-Ended    Single-Ended   
0.0009    0.234    3.5    0.5    11.5   
0    0    0    0    0   
3.6    3.6    3.6    5.5    5.25   
I2C    SPI    SPI    I2C    SPI   
Comparator
Oscillator   
N/A    N/A    Oscillator    N/A   
1.65    1.65    2.35    2.2    2.7   
3.6    3.6    3.6    5.5    5.25   
SAR    SAR    SAR    SAR    SAR   
-40 to 125    -40 to 125    -40 to 125    -40 to 85    -40 to 125   
10X2QFN    8VSSOP
8X2QFN   
8X2QFN    16WQFN    24VQFN
30TSSOP   
-80    -80    -85    N/A    -82   
71.5    70    74.9      71.7   
Supply    Supply    Supply    Supply    Ext