ADS7828E/2K5G4

Manufacturer Part NumberADS7828E/2K5G4
DescriptionIC ADC 12BIT 50KSPS 8CH 16-TSSOP
ManufacturerTexas Instruments
ADS7828E/2K5G4 datasheet
 


Specifications of ADS7828E/2K5G4

Number Of Bits12Sampling Rate (per Second)50k
Data InterfaceI²C, SerialNumber Of Converters1
Power Dissipation (max)680µWVoltage Supply SourceSingle Supply
Operating Temperature-40°C ~ 85°CMounting TypeSurface Mount
Package / Case16-TSSOP (0.173", 4.40mm Width)For Use With296-18368 - EVALUATION MODULE FOR ADS7823-28
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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12-Bit, 8-Channel Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
8-CHANNEL MULTIPLEXER
50kHz SAMPLING RATE
NO MISSING CODES
2.7V TO 5V OPERATION
INTERNAL 2.5V REFERENCE
2
I
C INTERFACE SUPPORTS:
Standard, Fast, and High-Speed Modes
TSSOP-16 PACKAGE
APPLICATIONS
VOLTAGE-SUPPLY MONITORING
ISOLATED DATA ACQUISITION
TRANSDUCER INTERFACES
BATTERY-OPERATED SYSTEMS
REMOTE DATA ACQUISITION
CH0
CH1
CH2
CH3
8-Channel
CH4
MUX
CH5
CH6
CH7
COM
S/H Amp
REF
/REF
IN
OUT
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.
2
I
C is a trademark of Koninklijke Philps Electronics N.V. All other 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.
2
with I
C
Interface
DESCRIPTION
The ADS7828 is a single-supply, low-power, 12-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
ADS7828 ideal for applications requiring the A/D converter to
be close to the input source in remote locations and for
applications requiring isolation. The ADS7828 is available in
a TSSOP-16 package.
SAR
CDAC
Comparator
Buffer
www.ti.com
ADS7828
SBAS181C – NOVEMBER 2001 - REVISED MARCH 2005
2
C interface and an
2
C serial,
SDA
SCL
Serial
Interface
A0
A1
2.5V V
REF
Copyright © 2001-2005, Texas Instruments Incorporated

ADS7828E/2K5G4 Summary of contents

  • Page 1

    ... IN OUT 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 trademark of Koninklijke Philps Electronics N.V. All other trademarks are the property of their respective owners. ...

  • Page 2

    ABSOLUTE MAXIMUM RATINGS +V to GND ........................................................................ –0.3V to +6V DD Digital Input Voltage to GND ................................. –0. Operating Temperature Range ...................................... – +105 C Storage Temperature Range ......................................... – +150 C Junction Temperature ...

  • 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 Positive Input - Negative ...

  • 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 Positive Input - ...

  • 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 FREQUENCY SPECTRUM (4096 Point FFT 1kHz, 0dB) IN 0.00 –40.00 –80.00 –120 Frequency (kHz) DIFFERENTIAL LINEARITY ERROR vs CODE (2.5V ...

  • Page 8

    TYPICAL CHARACTERISTICS +2.7V, V External +2.5V REF CHANGE IN GAIN vs TEMPERATURE 1.5 1.0 0.5 0.0 –0.5 –1.0 –1.5 –50 – Temperature ( C) POWER-DOWN SUPPLY CURRENT vs TEMPERATURE ...

  • Page 9

    THEORY OF OPERATION The ADS7828 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

    INITIATING CONVERSION Provided the master has write-addressed it, the ADS7828 turns on the A/D converter’s section and begins conversions when it receives BIT 4 of the command byte shown in the Command Byte. If the command byte is correct, the ...

  • Page 13

    READING IN HS MODE High Speed (HS) mode is fast enough that codes can be read out one at a time mode, there is not enough time for a single conversion to complete between the reception of a ...

  • Page 14

    READING WITH REFERENCE ON/OFF The internal reference defaults to off when the ADS7828 power is on. To turn the internal reference on or off, see Table I. If the reference (internal or external) is constantly turned on and off, a ...

  • Page 15

    LAYOUT For optimum performance, care should be taken with the physical layout of the ADS7828 circuitry. The basic SAR architecture is sensitive to glitches or sudden changes on the power supply, reference, ground connections, and digital inputs that occur just ...

  • Page 16

    ... PACKAGING INFORMATION Orderable Device (1) Package Type Package Status ADS7828E/250 ACTIVE TSSOP ADS7828E/250G4 ACTIVE TSSOP ADS7828E/2K5 ACTIVE TSSOP ADS7828E/2K5G4 ACTIVE TSSOP ADS7828EB/250 ACTIVE TSSOP ADS7828EB/250G4 ACTIVE TSSOP ADS7828EB/2K5 ACTIVE TSSOP ADS7828EB/2K5G4 ACTIVE TSSOP (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. ...

  • Page 17

    Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or ...

  • Page 18

    TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing ADS7828E/250 TSSOP PW ADS7828E/2K5 TSSOP PW ADS7828EB/250 TSSOP PW ADS7828EB/2K5 TSSOP PW PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) ...

  • Page 19

    Device Package Type ADS7828E/250 TSSOP ADS7828E/2K5 TSSOP ADS7828EB/250 TSSOP ADS7828EB/2K5 TSSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm 250 PW 16 2500 PW 16 250 PW 16 2500 Pack Materials-Page 2 ...

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    ... 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 latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...