1 Features

1• Low Power Consumption: As Low as 280 μA

• Low-Noise PGA: 19 nVRMS at Gain = 128

• Programmable Gain: 1 to 128

• Programmable Data Rates: 2.5 SPS to 4 kSPS

• Simultaneous 50-Hz and 60-Hz Rejection at

≤ 20 SPS with Low-Latency Digital Filter

• Analog Multiplexer with 12 (ADS124S08) or 6

(ADS124S06) Independently Selectable Inputs

• Dual-Matched Programmable Current Sources for

Sensor Excitation: 10 μA to 2000 μA

• Internal Reference: 2.5 V, 10 ppm/°C (max) Drift

• Internal Oscillator: 4.096 MHz, 1.5% Accuracy

• Internal Temperature Sensor

• Extended Fault Detection Circuits

• Self Offset and System Calibration

• Four General-Purpose I/Os

• SPI-Compatible Interface with Optional CRC

• Analog Supply: Unipolar (2.7 V to 5.25 V) or

Bipolar (±2.5 V)

• Digital Supply: 2.7 V to 3.6 V

• Operating Temperature: –50°C to +125°C

2 Applications

• Sensor Transducers and Transmitters:

Temperature, Pressure, Strain, Flow

• PLC and DCS Analog Input Modules

• Temperature Controllers

• Climate Chambers, Industrial Ovens

3 Description

The ADS124S06 and ADS124S08 are precision, 24-

bit, delta-sigma (ΔΣ), analog-to-digital converters

(ADCs) that offer low power consumption and many

integrated features to reduce system cost and

component count in applications measuring smallsignal

sensors.

These ADCs feature configurable digital filters that

offer low-latency conversion results and 50-Hz or

60-Hz rejection for noisy industrial environments. A

low-noise, programmable gain amplifier (PGA)

provides gains ranging from 1 to 128 to amplify lowlevel

signals for resistive bridge or thermocouple

applications. Additionally, these devices integrate a

low-drift, 2.5-V reference that reduces printed circuit

board (PCB) area. Finally, two programmable

excitation current sources (IDACs) allow for easy and

accurate RTD biasing.

An input multiplexer supports 12 inputs for the

ADS124S08 and six inputs for the ADS124S06 that

can be connected to the ADC in any combination for

design flexibility. In addition, these devices include

features such as sensor burn-out detection, voltage

bias for thermocouples, system monitoring, and four

general-purpose I/Os.

The devices are offered in a leadless VQFN-32 or a

TQFP-32 package.