ADS1110A7IDBVTG4 datasheet(6/24 Pages) TI1

Numer części	ADS1110A7IDBVTG4

Szczegółowy opis	16-Bit ANALOG-TO-DIGITAL CONVERTER with Onboard Reference

Download	24 Pages

Scroll/Zoom	100%

Producent	TI1 [Texas Instruments]

Strona internetowa	http://www.ti.com

Logo

6 / 24 page

ADS1110

SBAS276A − MARCH 2003 − REVISED NOVEMBER 2003

www.ti.com

6

TYPICAL CHARACTERISTICS (continued)

At TA = 25°C and VDD = 5V, unless otherwise noted.

THEORY OF OPERATION

The ADS1110 is a fully differential, 16-bit, self-calibrating,

delta-sigma A/D converter. Extremely easy to design with

and configure, the ADS1110 allows precise measure-

ments to be obtained with a minimum of effort.

The ADS1110 consists of a delta-sigma A/D converter

core with adjustable gain, a 2.048V reference, a clock os-

cillator, and an I2C interface. Each of these blocks are de-

scribed in detail in the sections that follow.

ANALOG-TO-DIGITAL CONVERTER

The ADS1110 A/D converter core consists of a differential

switched-capacitor delta-sigma modulator followed by a

digital filter. The modulator measures the voltage differ-

ence between the positive and negative analog inputs and

compares it to a reference voltage, which, in the ADS1110,

is 2.048V. The digital filter receives a high-speed bitstream

from the modulator and outputs a code, which is a number

proportional to the input voltage.

VOLTAGE REFERENCE

The ADS1110 contains an onboard 2.048V voltage refer-

ence. This reference is always used as the A/D converter’s

voltage reference; an external reference cannot be con-

nected. The ADS1110’s voltage reference is internal only,

and cannot be measured directly or used by external cir-

cuitry.

The onboard reference’s specifications are part of the

ADS1110’s overall gain and drift specifications. The con-

verter’s drift and gain error specifications reflect the perfor-

mance of the onboard reference as well as the perfor-

mance of the A/D converter core. There are no separate

specifications for the onboard reference itself.

OUTPUT CODE CALCULATION

The output code is a scalar value that is, except for clip-

ping, proportional to the voltage difference between the

two analog inputs. The output code is confined to a finite

range of numbers; this range depends on the number of

bits needed to represent the code. The number of bits

needed to represent the output code for the ADS1110 de-

pends on the data rate, as shown in Table 1.

DATA RATE

NUMBER OF

BITS

MINIMUM

CODE

MAXIMUM

CODE

15SPS

16

−32,768

32,767

30SPS

15

−16,384

16,383

60SPS

14

−8192

8191

240SPS

12

−2048

2047

Table 1. Minimum and Maximum Codes

For a minimum output code of Min Code, gain setting of

PGA, and positive and negative input voltages of VIN+ and

VIN−, the output code is given by the expression:

Output Code

+ −1

Min Code

PGA

(V

IN

)) * (VIN*)

2.048V

In the previous expression, it is important to note that the

negated minimum output code is used. The ADS1110

outputs codes in binary two’s complement format, so the

absolute values of the minima and maxima are not the

same; the maximum n−bit code is 2n−1 − 1, while the

minimum n−bit code is −1

× 2n−1.

Podobny numer części - ADS1110A7IDBVTG4

Producent	Numer części	Arkusz danych	Szczegółowy opis
Texas Instruments	ADS1110A7IDBVTG4	742Kb / 22P	[Old version datasheet] 16-Bit ANALOG-TO-DIGITAL CONVERTER with Onboard Reference NOVEMBER 2003

More results

Podobny opis - ADS1110A7IDBVTG4

Producent	Numer części	Arkusz danych	Szczegółowy opis
Texas Instruments	ADS1110	1Mb / 23P	[Old version datasheet] 16-Bit ANALOG-TO-DIGITAL CONVERTER with Onboard Reference
	ADS1110	1Mb / 23P	[Old version datasheet] 16-Bit ANALOG-TO-DIGITAL CONVERTER with Onboard Reference
	ADS1110	742Kb / 22P	[Old version datasheet] 16-Bit ANALOG-TO-DIGITAL CONVERTER with Onboard Reference NOVEMBER 2003
	ADS1110	520Kb / 17P	[Old version datasheet] 16-Bit ANALOG-TO-DIGITAL CONVERTER with Onboard Reference
	ADS1112	1Mb / 26P	[Old version datasheet] 16-Bit Analog-to-Digital Converter with Input Multiplexer and Onboard Reference
Burr-Brown (TI)	ADS1112	682Kb / 18P	16-Bit Analog-to-Digital Converter with Input Multiplexer and Onboard Reference
Micro Analog systems	MAS6501	205Kb / 16P	16-Bit Analog-to-Digital Converter
DATEL, Inc.	5962-8953101HXA	149Kb / 1P	16-Bit Digital To Analog Converter
DATEL, Inc.	5962-8953102HXC	149Kb / 1P	16-Bit Digital To Analog Converter
SHENZHEN FUMAN ELECTRON...	SC8211	592Kb / 9P	16 Bit Digital to Analog Converter

More results

ADS1110A7IDBVTG4 Arkusz danych(PDF) 6 Page - Texas Instruments

ADS1110A7IDBVTG4 Arkusz danych(HTML) 6 Page - Texas Instruments

Podobny numer części - ADS1110A7IDBVTG4

Podobny opis - ADS1110A7IDBVTG4

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

Arkusz danych Pobierz

Link URL