ADS1244 24-Bit 15sps Delta-Sigma ADC with 50 & 60Hz rejection | TI.com

ADS1244 (ACTIVE) 24-Bit 15sps Delta-Sigma ADC with 50 & 60Hz rejection

24-Bit 15sps Delta-Sigma ADC with 50 & 60Hz rejection - ADS1244
Datasheet
 

Description

The ADS1244 is a 24-bit, delta-sigma Analog-to-Digital (A/D) converter. It offers excellent performance and very low power in an MSOP-10 package and is well suited for demanding high-resolution measurements, especially in portable and other space- and power-constrained systems.

A 3rd-order delta-sigma modulator and digital filter form the basis of the A/D converter. The analog modulator has a ±5V differential input range. The digital filter rejects both 50Hz and 60Hz signals, completely settles in one cycle, and outputs data at 15 samples per second.

A simple, 2-wire serial interface provides all the necessary control. Data retrieval, self-calibration, and Sleep Mode are handled with a few simple waveforms. When only single conversions are needed, the ADS1244 can be shut down (Sleep Mode) while idle between measurements to dramatically reduce the overall power dissipation. Multiple ADS1244s can be connected together to create a synchronously sampling multichannel measurement system. The ADS1244 is designed to easily connect to microcontrollers, such as the MSP430.

The ADS1244 supports 2.5V to 5.25V analog supplies and 1.8V to 3.6V digital supplies. Power is typically less than 270uW in normal operation and less than 1uW during Sleep Mode.

Features

  • 20-BIT EFFECTIVE RESOLUTION
  • CURRENT CONSUMPTION: 90uA
  • ANALOG SUPPLY: 2.5V to 5.25V
  • DIGITAL SUPPLY: 1.8V to 3.6V
  • ±5V DIFFERENTIAL INPUT RANGE
  • 0.0002%INL (TYP), 0.0008%INL (MAX)
  • SIMPLE 2-WIRE SERIAL INTERFACE
  • SIMULTANEOUS 50Hz AND 60Hz REJECTION
  • SINGLE CONVERSIONS WITH SLEEP MODE
  • SINGLE-CYCLE SETTLING
  • SELF-CALIBRATION
  • WELL-SUITED FOR MULTICHANNEL SYSTEMS
  • EASILY CONNECTS TO THE MSP430
  • APPLICATIONS
    • HAND-HELD INSTRUMENTATION
    • PORTABLE MEDICAL EQUIPMENT
    • INDUSTRIAL PROCESS CONTROL
    • WEIGH SCALES

WEBENCH® Designer ADS1244



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
ADS1244 Order now 24     0.03     1     SPI     -40 to 85     VSSOP | 10     4.08 | 1ku     0.27     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)     Delta-Sigma     Differential
Single-Ended    
    Ext     50/60 Hz Rejection     5.25     0     2.5     5.25     1.8     3.6     134.2     Catalog    
ADS1245 Samples not available 24     0.015     1     SPI     -40 to 85     VSSOP | 10     5.41 | 1ku     0.27     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)     Delta-Sigma     Differential
Single-Ended    
    Ext     50/60 Hz Rejection     4     0     2.5     5.25     1.8     3.6     251.7     Catalog