ADC128D818 12-Bit, 82SPS, 8-Ch Delta-Sigma ADC with Temp Sensor, INT / EXT Voltage Reference & I2C Interface | TI.com

ADC128D818 (ACTIVE) 12-Bit, 82SPS, 8-Ch Delta-Sigma ADC with Temp Sensor, INT / EXT Voltage Reference & I2C Interface

 

Description

The ADC128D818 I2C system monitor is designed for maximum flexibility. The system monitor can be configured for single-ended and/or pseudo-differential inputs. An onboard temperature sensor, combined with WATCHDOG window comparators, and an interrupt output pin, INT, allow easy monitoring and out-of-range alarms for every channel. A high performance internal reference is also available to provide for a complete solution in the most difficult operating conditions.

The ADC128D818’s 12-bit delta-sigma ADC supports Standard Mode (Sm, 100 kbps) and Fast Mode (Fm, 400 kbps) I2C interfaces. The ADC128D818 includes a sequencer to control channel conversions and stores all converted results in independent registers for easy microprocessor retrieval. Unused channels can be shut down independently to conserve power.

The ADC can use either an internal 2.56-V reference or a variable external reference. An analog filter is included on the I2C digital control lines to provide improved noise immunity. The device also includes a TIME-OUT reset function on SDA and SCL to prevent I2C bus lock-up.

The ADC128D818 operates from 3-V to 5.5-V power supply voltage range, –40°C to 125°C temperature range, and the device is available in a 16-pin TSSOP package.

Features

  • 12-Bit Resolution Delta-Sigma ADC
  • Local Temperature Sensing
  • Configurable Single-Ended and/or Pseudo-Diff.
    Inputs
  • 2.56-V Internal VREF or Variable External VREF
  • WATCHDOG Window Comparators with Status
    and Mask Registers of All Measured Values
  • Independent Registers for Storing Measured
    Values
  • INT Output Notifies Microprocessor of Error Event
  • I2C Serial Bus Interface Compatibility
  • 9 Selectable Addresses
  • TIME-OUT Reset Function to Prevent I2C Bus
    Lock-Up
  • Individual Channel Shutdown to Limit Power
    Consumption
  • Deep Shutdown Mode to Minimize Power
    Consumption
  • TSSOP 16-Lead Package
  • Key Specifications
    • ADC Resolution 12-Bit
    • Supply Voltage Range 3 V to 5.5 V
    • Total Unadjusted Error –0.45%/+0.2%
    • Integral Non-Linearity ±1 LSb
    • Differential Non-Linearity ±1 LSb
    • Operating Current 0.56 mA
    • Deep Shutdown Current 10 ±A
    • Temperature Resolution °C/LSb
    • Temperature Accuracy (–40°C to 125°C) ±3°C
    • Temperature Accuracy (–25°C to 100°C) ±2°C

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
ADC128D818 Order now 12     0.082     8     I2C     -40 to 125     TSSOP | 16     1.95 | 1ku     2     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Pseudo-Differential
Single-Ended    
Multiplexed     Ext
Int    
Oscillator
Temp Sensor    
5.5     0     3     5.5     3     5.5     1     Catalog    
ADS1013 Order now 12     3.3     1     I2C     -40 to 125     VSSOP | 10
X2QFN | 10    
0.95 | 1ku     0.3     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)
10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)    
Delta-Sigma     Differential
Single-Ended    
   
Int     Oscillator
Small Size    
5.5     0     2     5.5     2     5.5     0.5     Catalog    
ADS1014 Order now 12     3.3     1     I2C     -40 to 125     VSSOP | 10
X2QFN | 10    
1.05 | 1ku     0.3     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)
10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)    
Delta-Sigma     Differential
Single-Ended    
   
Int     Comparator
Oscillator
PGA
Small Size    
5.5     0     2     5.5     2     5.5     0.5     Catalog    
ADS1015 Order now 12     3.3     4     I2C     -40 to 125     VSSOP | 10
X2QFN | 10    
1.15 | 1ku     0.3     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)
10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)    
Delta-Sigma     Differential
Single-Ended    
Multiplexed     Int     Comparator
Oscillator
PGA
Small Size    
5.5     0     2     5.5     2