ADS1113 datasheet(8/49 Pages) TI2

8 / 49 page

7 Detailed Description

7.1 Overview

The ADS101x are very small, low-power, noise-free, 12-bit, delta-sigma (ΔΣ) analog-to-digital converters

(ADCs). The ADS101x consist of a ΔΣ ADC core with an internal voltage reference, a clock oscillator and an I2C

interface. The ADS1014 and ADS1015 also integrate a programmable gain amplifier (PGA) and a programmable

digital comparator. Figure 7-1, Figure 7-2, and Figure 7-3 show the functional block diagrams of ADS1015,

ADS1014, and ADS1013, respectively.

The ADS101x ADC core measures a differential signal, VIN, that is the difference of V(AINP) and V(AINN). The

converter core consists of a differential, switched-capacitor ΔΣ modulator followed by a digital filter. This

architecture results in a very strong attenuation of any common-mode signals. Input signals are compared to

the internal voltage reference. The digital filter receives a high-speed bitstream from the modulator and outputs a

code proportional to the input voltage.

The ADS101x have two available conversion modes: single-shot and continuous-conversion. In single-shot

mode, the ADC performs one conversion of the input signal upon request, stores the conversion value to an

internal conversion register, and then enters a power-down state. This mode is intended to provide significant

power savings in systems that only require periodic conversions or when there are long idle periods between

conversions. In continuous-conversion mode, the ADC automatically begins a conversion of the input signal as

soon as the previous conversion is completed. The rate of continuous conversion is equal to the programmed

data rate. Data can be read at any time and always reflect the most recent completed conversion.

7.2 Functional Block Diagrams

Comparator

ALERT/RDY

Voltage

Reference

SCL

SDA

ADDR

ADS1015

Interface

12-Bit

ADC

Oscillator

PGA

GND

VDD

MUX

AIN1

AIN2

AIN0

AIN3

Figure 7-1. ADS1015 Block Diagram

Comparator

ALERT/RDY

PGA

Voltage

Reference

SCL

SDA

ADDR

ADS1014

AIN1

GND

AIN0

VDD

Interface

12-Bit

ADC

Oscillator

Figure 7-2. ADS1014 Block Diagram

Voltage

Reference

SCL

SDA

ADDR

ADS1013

AIN1

GND

AIN0

VDD

Interface

12-Bit

ADC

Oscillator

Figure 7-3. ADS1013 Block Diagram

ADS1013, ADS1014, ADS1015

SBAS473F – MAY 2009 – REVISED JANUARY 2025

www.ti.com

Submit Document Feedback

Product Folder Links: ADS1013 ADS1014 ADS1015

ADS1113 Datasheet(PDF) 8 Page - Texas Instruments

ADS1113 Datasheet(HTML) 8 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 44 45 46 47 48 49

Datasheet Download

Link URL