ADS1113 datasheet(21/43 Pages) TI2

21 / 43 page

0.1 µF

VDD

DIN

DOUT

Microcontroller or

Microprocessor

with SPI Port

SCLK

GND

AIN0

AIN1

DIN

DOUT/

DRDY

VDD

AIN3

AIN2

Device

Inputs Selected

from Configuration

SCLK

50 W

ADS1018

www.ti.com

SBAS526D – NOVEMBER 2012 – REVISED SEPTEMBER 2019

Product Folder Links: ADS1018

Submit Documentation Feedback

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The ADS1018 is a precision, 12-bit ΔΣ ADC that offers many integrated features to ease the measurement of the

most common sensor types including various type of temperature and bridge sensors. The following sections

give example circuits and suggestions for using the ADS1018 in various situations.

9.1.1 Serial Interface Connections

The principle serial interface connections for the ADS1018 are shown in Figure 18.

Figure 18. Typical Connections

Most microcontroller SPI peripherals operate with the ADS1018. The interface operates in SPI mode 1 where

CPOL = 0 and CPHA = 1, SCLK idles low, and data are launched or changed only on SCLK rising edges; data

are latched or read by the master and slave on SCLK falling edges. Details of the SPI communication protocol

employed by the ADS1018 can be found in the Timing Requirements: Serial Interface section.

It is a good practice to place 50-Ω resistors in the series path to each of the digital pins to provide some short-

circuit protection. Take care to still meet all SPI timing requirements because these additional series resistors

along with the bus parasitic capacitances present on the digital signal lines slews the signals.

The fully-differential input of the ADS1018 is ideal for connecting to differential sources (such as thermocouples

and thermistors) with a moderately low source impedance. Although the ADS1018 can read fully-differential

signals, the device cannot accept negative voltages on either of its inputs because of ESD protection diodes on

each pin. When an input exceeds supply or drops below ground, these diodes turn on to prevent any ESD

damage to the device.

ADS1113 Datasheet(PDF) 21 Page - Texas Instruments

ADS1113 Datasheet(HTML) 21 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

Datasheet Download

Link URL