ADS1216 CONVERTER Datasheet

ADS1216 Datasheet, PDF, Equivalent


Part Number

ADS1216

Description

ANALOG-TO-DIGITAL CONVERTER

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download ADS1216 Datasheet


ADS1216
www.ti.com
ADS1216
ADS1216
SBAS171D – NOVEMBER 2000 – REVISED SEPTEMBER 2006
8-Channel, 24-Bit
ANALOG-TO-DIGITAL CONVERTER
FEATURES
24 BITS, NO MISSING CODES
0.0015% INL
22 BITS EFFECTIVE RESOLUTION
(PGA = 1), 19 BITS (PGA = 128)
PGA FROM 1 TO 128
SINGLE-CYCLE SETTLING MODE
PROGRAMMABLE DATA OUTPUT RATES:
up to 1kHz
ON-CHIP 1.25V/2.5V REFERENCE
EXTERNAL DIFFERENTIAL REFERENCE:
0.1V to 2.5V
ON-CHIP CALIBRATION
SPI™-COMPATIBLE
2.7V TO 5.25V
< 1mW POWER CONSUMPTION
APPLICATIONS
INDUSTRIAL PROCESS CONTROL
LIQUID/GAS CHROMATOGRAPHY
BLOOD ANALYSIS
SMART TRANSMITTERS
PORTABLE INSTRUMENTATION
WEIGHT SCALES
PRESSURE TRANSDUCERS
DESCRIPTION
The ADS1216 is a precision, wide dynamic range,
delta-sigma, Analog-to-Digital (A/D) converter with
24-bit resolution operating from 2.7V to 5.25V
supplies. The delta-sigma A/D converter provides up
to 24 bits of no-missing-code performance and an
effective resolution of 22 bits.
The eight input channels are multiplexed. Internal
buffering can be selected to provide a very high input
impedance for direct connection to transducers or
low-level voltage signals. Burnout current sources
are provided that allow for the detection of an open
or shorted sensor. An 8-bit Digital-to-Analog
Converter (DAC) provides an offset correction with a
range of 50% of the FSR (Full-Scale Range).
The PGA (Programmable Gain Amplifier) provides
selectable gains of 1 to 128 with an effective
resolution of 19 bits at a gain of 128. The A/D
conversion is accomplished with a second-order
delta-sigma modulator and programmable sinc filter.
The reference input is differential and can be used
for ratiometric cancellation. The onboard current
DACs operate independently with the maximum
current set by an external resistor.
The serial interface is SPI-compatible. Eight bits of
digital I/O are also provided that can be used for
input or output. The ADS1216 is designed for
high-resolution measurement applications in smart
transmitters, industrial process control, weight
scales, chromatography, and portable
instrumentation.
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.
SPI is a trademark of Motorola.
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 the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2000–2006, Texas Instruments Incorporated

ADS1216
ADS1216
SBAS171D – NOVEMBER 2000 – REVISED SEPTEMBER 2006
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
ORDERING INFORMATION
For the most current package and ordering information see the Package Option Addendum at the end of this
document, or see the TI web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS(1)
AVDD to AGND
DVDD to DGND
Input Current
Input Current
AIN
AVDD to DVDD
AGND to DGND
Digital Input Voltage to GND
Digital Output Voltage to GND
Maximum Junction Temperature
Operating Temperature Range
Storage Temperature Range
ADS1216
–0.3 to +6
–0.3 to +6
100, Momentary
10, Continuous
GND – 0.5 to AVDD + 0.5
–6 to +6
–0.3 to +0.3
–0.3 to DVDD + 0.3
–0.3 to DVDD + 0.3
+150
–40 to +85
–60 to +100
UNIT
V
V
mA
mA
V
V
V
V
V
°C
°C
°C
(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may
degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those specified is not implied.
2 Submit Documentation Feedback


Features www.ti.com ADS1216 ADS1216 SBAS171D NOVEMBER 2000 – REVISED SEPTEMBER 2006 8-Channel, 24-Bit ANALOG-TO-DIGITA L CONVERTER FEATURES • 24 BITS, NO M ISSING CODES • 0.0015% INL • 22 BIT S EFFECTIVE RESOLUTION (PGA = 1), 19 BI TS (PGA = 128) • PGA FROM 1 TO 128 SINGLE-CYCLE SETTLING MODE • PROGRA MMABLE DATA OUTPUT RATES: up to 1kHz ON-CHIP 1.25V/2.5V REFERENCE • EXTE RNAL DIFFERENTIAL REFERENCE: 0.1V to 2. 5V • ON-CHIP CALIBRATION • SPI™-C OMPATIBLE • 2.7V TO 5.25V • < 1mW P OWER CONSUMPTION APPLICATIONS • INDUS TRIAL PROCESS CONTROL • LIQUID/GAS CH ROMATOGRAPHY • BLOOD ANALYSIS • SMA RT TRANSMITTERS • PORTABLE INSTRUMENT ATION • WEIGHT SCALES • PRESSURE TR ANSDUCERS DESCRIPTION The ADS1216 is a precision, wide dynamic range, delta-s igma, Analog-to-Digital (A/D) converter with 24-bit resolution operating from 2.7V to 5.25V supplies. The delta-sigma A/D converter provides up to 24 bits o f no-missing-code performance and an effective resolution of 22 bits. The eight input channels are multiple.
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