PGA

Input

Mux

Serial

Interface

and

Control

CS

DOUT/DRDY

SCLK

DRDY

START/SYNC

4.096-MHz

Oscillator

CLK

REFOUT

Reference

Detection

PGA Rail

Detection

AINCOM

AIN0

AIN1

/ GPIO1

Power Supplies

Temperature

Sensor

ADS124S06

ADS124S08

DVDD

DGND

AIN2

AIN3

AIN4

AIN5

/ REFP1

/ REFN1

/ GPIO0

Excitation

Current

Sources

RESET

DIN

REFP0

REFCOM

/ GPIO3

/ GPIO2

AVSS

VBIAS

AVDD

Reference

Buffers

Reference

Mux

2.5-V

Reference

REFN0

ADS124S08

Only

Burnout

Detect

Burnout

Detect

24-Bit û

ADC

Configurable

Digital

Filter

AVSS_SW

DVDD

IOVDD

System-,

Self-

Calibration

AIN9

AIN6

AIN7

AIN8

AIN11

AIN10

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

ADS124S06, ADS124S08

SBAS660A – AUGUST 2016 – REVISED AUGUST 2016

ADS124S0x Low-Power, Low-Noise, Highly-Integrated, 6- and 12-Channel,

4-kSPS, 24-Bit, Delta-Sigma ADC with PGA and Voltage Reference

1

1 Features

1

•

Low Power Consumption: As Low As 295 µA

•

•

Programmable Gain: 1 to 128

•

Programmable Data Rates up to 4 kSPS

•

Simultaneous 50-Hz and 60-Hz Rejection at

20 SPS with Single-Cycle Settling 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 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

•

Temperature Sensor Measurements:

RTDs, Thermocouples, and Thermistors

•

Bridge Sensor Measurements

•

Electromagnetic Flow Meters

•

Factory Automation and Process Controls

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 small-

signal sensors.

These ADCs feature configurable digital filters that

offer single-cycle settling for 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 V/V to 128 V/V to amplify low-level signals for

resistive

bridge

or

thermocouple

applications.

Additionally, the 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.

Device Information

ORDER NUMBER

PACKAGE (PIN)

BODY SIZE

ADS124S0x

TQFP (32)

5.0 mm × 5.0 mm

VQFN (32)

5.0 mm × 5.0 mm

Functional Block Diagram