ADS1113IDGSR datasheet(26/36 Pages) TI

Part #	ADS1113IDGSR

Description	Ultra-Small, Low-Power, 16-Bit Analog-to-Digital Converter with Internal Reference

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Manufacturer	TI [Texas Instruments]

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0.1 F(typ)

m

VDD

5

10

1

2

3

4

ADDR

ALERT/RDY

GND

AIN0

AIN1

SCL

9

8

7

6

SDA

VDD

AIN3

AIN2

ADS1115

InputsSelected

fromConfiguration

Register

OutputCodes

0 32767

-

ADS1113

ADS1114

ADS1115

SBAS444B – MAY 2009 – REVISED OCTOBER 2009

www.ti.com

SINGLE-ENDED INPUTS

The ADS1115 input range is bipolar differential with

respect to the reference. The single-ended circuit

Although the ADS1115 has two differential inputs, the

shown in Figure 37 covers only half the ADS1115

device can easily measure four single-ended signals.

input scale because it does not produce differentially

Figure 37 shows a single-ended connection scheme.

negative inputs; therefore, one bit of resolution is lost.

The

ADS1115

is

configured

for

single-ended

measurement by configuring the MUX to measure

each channel with respect to ground. Data are then

read out of one input based on the selection on the

configuration register. The single-ended signal can

range from 0V to supply. The ADS1115 loses no

linearity anywhere within the input range. Negative

voltages cannot be applied to this circuit because the

ADS1115 can only accept positive voltages.

NOTE: Digital and address pin connections omitted for clarity.

Figure 37. Measuring Single-Ended Inputs

26

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ADS1113IDGSR Datasheet(PDF) 26 Page - Texas Instruments

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