ADS7830I Burr-Brown Corporation, ADS7830I Datasheet

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ADS7830I

Manufacturer Part Number
ADS7830I
Description
8-Bit/ 8-Channel Sampling ANALOG-TO-DIGITAL CONVERTER with I2C Interface
Manufacturer
Burr-Brown Corporation
Datasheet

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FEATURES
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
70kHz SAMPLING RATE
8 BITS NO MISSING CODES
4 DIFFERENTIAL/8 SINGLE-ENDED INPUTS
2.7V TO 5V OPERATION
BUILT-IN 2.5V REFERENCE/BUFFER
SUPPORTS ALL THREE I
Standard, Fast, and High-Speed
LOW POWER:
180 W (Standard Mode)
300 W (High-Speed Mode)
675 W (Fast Mode)
DIRECT PIN COMPATIBLE WITH ADS7828
TSSOP-16 PACKAGE
0.5LSB INL/DNL
COM
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
REF
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
IN
/REF
OUT
ANALOG-TO-DIGITAL CONVERTER
8-Channel
MUX
8-Bit, 8-Channel Sampling
2
C MODES:
S/H Amp
with I
2
C
www.ti.com
CDAC
Interface
APPLICATIONS
DESCRIPTION
The ADS7830 is a single-supply, low-power, 8-bit data
acquisition device that features a serial I
8-channel multiplexer. The Analog-to-Digital (A/D) converter
features a sample-and-hold amplifier and internal,
asynchronous clock. The combination of an I
2-wire interface and micropower consumption makes the
ADS7830 ideal for applications requiring the A/D converter to
be close to the input source in remote locations and for
applications requiring isolation. The ADS7830 is available in
a TSSOP-16 package.
VOLTAGE-SUPPLY MONITORING
ISOLATED DATA ACQUISITION
TRANSDUCER INTERFACE
BATTERY-OPERATED SYSTEMS
REMOTE DATA ACQUISITION
SAR
Comparator
Buffer
Copyright © 2003, Texas Instruments Incorporated
2.5V V
REF
Interface
SBAS302 – DECEMBER 2003
Serial
ADS7830
2
C interface and an
2
C serial,
SCL
A1
SDA
A0

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ADS7830I Summary of contents

Page 1

Sampling ANALOG-TO-DIGITAL CONVERTER FEATURES 70kHz SAMPLING RATE 0.5LSB INL/DNL 8 BITS NO MISSING CODES 4 DIFFERENTIAL/8 SINGLE-ENDED INPUTS 2. OPERATION BUILT-IN 2.5V REFERENCE/BUFFER 2 SUPPORTS ALL THREE I C MODES: Standard, Fast, and High-Speed LOW POWER: ...

Page 2

... ORDERING TRANSPORT NUMBER MEDIA, QUANTITY ADS7830IPWT Tape and Reel, 250 " ADS7830IPWR Tape and Reel, 2500 DESCRIPTION Analog Input Channel 0 Analog Input Channel 1 Analog Input Channel 2 Analog Input Channel 3 Analog Input Channel 4 Analog Input Channel 5 Analog Input Channel 6 ...

Page 3

ELECTRICAL CHARACTERISTICS: +2. – + +2.7V +2.5V, SCL Clock Frequency = 3.4MHz (High-Speed Mode), unless otherwise noted REF PARAMETER ANALOG INPUT Full-Scale Input Scan Absolute Input Range Capacitance ...

Page 4

ELECTRICAL CHARACTERISTICS: + – + +5.0V External +5.0V, SCL Clock Frequency = 3.4MHz (High-Speed Mode), unless otherwise noted REF PARAMETER ANALOG INPUT Full-Scale Input Scan Absolute Input Range ...

Page 5

TIMING DIAGRAM SDA t BUF t LOW SCL t HD; STA STOP START TIMING CHARACTERISTICS – + +2.7V, unless otherwise noted PARAMETER SYMBOL SCL Clock Frequency Bus Free Time Between ...

Page 6

TIMING CHARACTERISTICS – + +2.7V, unless otherwise noted PARAMETER SYMBOL Rise Time of SDA Signal t Fall Time of SDA Signal t Setup Time for STOP Condition t SU Capacitive ...

Page 7

TYPICAL CHARACTERISTICS +2.7V, V External +2.5V REF FFT vs FREQUENCY 100 0 10 Frequency (kHz) DIFFERENTIAL LINEARITY ERROR vs CODE (2.5V Internal Reference) 0.5 0.4 0.3 ...

Page 8

TYPICAL CHARACTERISTICS +2.7V, V External +2.5V REF CHANGE IN GAIN vs TEMPERATURE 0.10 0.05 0 0.05 0. Temperature ( C) POWER-DOWN SUPPLY CURRENT vs TEMPERATURE 750 600 ...

Page 9

THEORY OF OPERATION The ADS7830 is a classic Successive Approximation Regis- ter (SAR) A/D converter. The architecture is based on ca- pacitive redistribution which inherently includes a sample- and-hold function. The converter is fabricated on a 0.6 CMOS process. The ...

Page 10

The following bus protocol has been defined (as shown in Figure 2): • Data transfer may be initiated only when the bus is not busy. • During data transfer, the data line must remain stable whenever the clock line is ...

Page 11

Address Byte MSB The address byte is the first byte received following the START condition from the master device. The first five bits (MSBs) of the slave address are factory pre-set ...

Page 12

READING DATA Data can be read from the ADS7830 by read-addressing the part (LSB of address byte set to 1) and receiving the transmitted byte. Converted data can only be read from the ADS7830 once a conversion has been initiated ...

Page 13

F/S Mode Mode Master Code HS Mode Enabled ADC Power-Down Mode Write-Addressing Byte ADC Converting Mode ...

Page 14

... PACKAGING INFORMATION ORDERABLE DEVICE STATUS(1) ADS7830IPWR ACTIVE ADS7830IPWT ACTIVE (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design ...

Page 15

PW (R-PDSO-G**) 14 PINS SHOWN 0, 0,15 1,20 MAX 0,05 PINS ** DIM A MAX A MIN NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body ...

Page 16

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the ...

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