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.