ADS1231 Series

24-Bit, 80SPS, 1-Ch Delta-Sigma ADC for Resistive Bridge Sensors & Weigh Scales

Catalog

24-Bit, 80SPS, 1-Ch Delta-Sigma ADC for Resistive Bridge Sensors & Weigh Scales

Part	Number of Inputs	Package / Case	Package / Case [x]	Package / Case [y]	Sampling Rate (Per Second)	Number of Bits	Architecture	Reference Type	Input Type	Voltage - Supply, Analog [Max]	Voltage - Supply, Analog [Min]	Number of A/D Converters	Supplier Device Package	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Configuration	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Data Interface
Texas Instruments ADS1231IDR	1	16-SOIC	0.154 in	3.9 mm	80 Per Second	24	Sigma-Delta	External	Differential	5.3 V	3 V	1	16-SOIC	Surface Mount	85 °C	-40 °C	ADC	5.3 V	3 V	Serial
Texas Instruments ADS1231ID	1	16-SOIC	0.154 in	3.9 mm	80 Per Second	24	Sigma-Delta	External	Differential	5.3 V	3 V	1	16-SOIC	Surface Mount	85 °C	-40 °C	ADC	5.3 V	3 V	Serial

Catalog

24-Bit, 80SPS, 1-Ch Delta-Sigma ADC for Resistive Bridge Sensors & Weigh Scales

Key Features

• Complete Front-End for Bridge SensorsInternal Amplifier, Gain of 128Internal OscillatorLow-Side Power Switch for Bridge SensorLow Noise: 35nVrmsSelectable Data Rates: 10SPS or 80SPSSimultaneous 50Hz and 60Hz Rejection at 10SPSInput EMI FilterExternal Voltage Reference up to 5V for Ratiometric MeasurementsSimple, Pin-Driven ControlTwo-Wire Serial Digital InterfaceSupply Range: 3V to 5.3VPackage: SOIC-16Temperature Range: –40°C to +85°CAPPLICATIONSWeigh ScalesStrain GaugesLoad CellsIndustrial Process ControlAll other trademarks are the property of their respective ownersComplete Front-End for Bridge SensorsInternal Amplifier, Gain of 128Internal OscillatorLow-Side Power Switch for Bridge SensorLow Noise: 35nVrmsSelectable Data Rates: 10SPS or 80SPSSimultaneous 50Hz and 60Hz Rejection at 10SPSInput EMI FilterExternal Voltage Reference up to 5V for Ratiometric MeasurementsSimple, Pin-Driven ControlTwo-Wire Serial Digital InterfaceSupply Range: 3V to 5.3VPackage: SOIC-16Temperature Range: –40°C to +85°CAPPLICATIONSWeigh ScalesStrain GaugesLoad CellsIndustrial Process ControlAll other trademarks are the property of their respective owners

Description

The ADS1231 is a precision, 24-bit analog-to-digital converter (ADC). With an onboard low-noise amplifier, onboard oscillator, precision third-order 24-bit delta-sigma () modulator, and bridge power switch, the ADS1231 provides a complete front-end solution for bridge sensor applications including weigh scales, strain gauges, and load cells. The low-noise amplifier has a gain of 128, supporting a full-scale differential input of ±19.5mV. TheADC has 24-bit resolution and is comprised of a third-order modulator and fourth-order digital filter. Two data rates are supported: 10SPS (with both 50Hz and 60Hz rejection) and 80SPS. The ADS1231 can be put in a low-power standby mode or shut off completely in power-down mode. The ADS1231 is controlled by dedicated pins; there are no digital registers to program. Data are output over an easily-isolated serial interface that connects directly to the MSP430 and other microcontrollers. The ADS1231 is available in an SO-16 package and is specified from –40°C to +85°C. The ADS1231 is a precision, 24-bit analog-to-digital converter (ADC). With an onboard low-noise amplifier, onboard oscillator, precision third-order 24-bit delta-sigma () modulator, and bridge power switch, the ADS1231 provides a complete front-end solution for bridge sensor applications including weigh scales, strain gauges, and load cells. The low-noise amplifier has a gain of 128, supporting a full-scale differential input of ±19.5mV. TheADC has 24-bit resolution and is comprised of a third-order modulator and fourth-order digital filter. Two data rates are supported: 10SPS (with both 50Hz and 60Hz rejection) and 80SPS. The ADS1231 can be put in a low-power standby mode or shut off completely in power-down mode. The ADS1231 is controlled by dedicated pins; there are no digital registers to program. Data are output over an easily-isolated serial interface that connects directly to the MSP430 and other microcontrollers. The ADS1231 is available in an SO-16 package and is specified from –40°C to +85°C.