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ADS7280 Datasheet Preview

ADS7280 Datasheet

Analog-to-Digital Converter

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ADS7279
ADS7280
www.ti.com ............................................................................................................................................................... SBAS436A – MAY 2008 – REVISED JUNE 2009
LOW-POWER, 14-BIT, 1MHz, SINGLE/DUAL UNIPOLAR INPUT,
ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE
FEATURES
1
23 2.7V to 5.5V Analog Supply, Low Power:
– 13.7mW (1MHz, +VA = 3V, +VBD = 1.8V)
1MHz Sampling Rate 3V +VA 5.5V,
900kHz Sampling Rate 2.7V +VA 3V
Excellent DC Performance:
– ±0.4LSB Typ, ±1.0LSB Max INL
– ±0.4LSB Typ, ±1.0LSB Max DNL
– ±0.8mV Max Offset Error at 3V
– ±1.25mV Max Offset Error at 5V
Excellent AC Performance at fI = 10kHz with
85.9dB SNR, 105.3dB SFDR, –100.1dB THD
Built-In Conversion Clock (CCLK)
1.65V to 5.5V I/O Supply:
– SPI™/DSP-Compatible Serial Interface
– SCLK up to 50MHz
Comprehensive Power-Down Modes:
– Deep Power-Down
– Nap Power-Down
– Auto Nap Power-Down
Unipolar Input Range: 0V to VREF
Software Reset
Global CONVST (Independent of CS)
Programmable Status/Polarity EOC/INT
4 × 4 QFN-16 and TSSOP-16 Packages
Multi-Chip Daisy-Chain Mode
Programmable TAG Bit Output
Auto/Manual Channel Select Mode (ADS7280)
APPLICATIONS
Communications
Transducer Interface
Medical Instruments
Magnetometers
Industrial Process Control
Data Acquisition Systems
Automatic Test Equipment
DESCRIPTION
The ADS7279 is a low-power, 14-bit, 1MSPS
analog-to-digital converter (ADC) with a unipolar
input. The device includes a 14-bit, capacitor-based
successive approximation register (SAR) ADC with
inherent sample-and-hold.
The ADS7280 is based on the same core and
includes a 2-to-1 input MUX with a programmable
TAG bit output option. Both the ADS7279 and
ADS7280 offer a high-speed, wide voltage serial
interface, and are capable of daisy-chain mode
operation when multiple converters are used.
These converters are available in 4 × 4 QFN and
TSSOP-16 packages, and are fully specified for
operation over the industrial –40°C to +85°C
temperature range.
Low Power, High-Speed SAR Converter Family
Type/Speed
16-bit single-ended
14-bit single-ended
12-bit single-ended
Single
Dual
Single
Dual
Single
Dual
500 kSPS
ADS8327
ADS8328
1 MSPS
ADS8329
ADS8330
ADS7279
ADS7280
ADS7229
ADS7230
ADS7280 ADS7279
+IN1
NC
+IN0
COM
+IN
-IN
REF+
REF
SAR
OUTPUT
LATCH
SDO
and
3-STATE
+
_
CDAC
COMPARATOR
DRIVER
CONVERSION
and
CONTROL
FS/CS
SCLK
SDI
OSC
LOGI C
CONVST
EOC/INT/CDI
1
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, Inc.
2
All other trademarks are the property of their respective owners.
3
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 © 2008–2009, Texas Instruments Incorporated




etcTI

ADS7280 Datasheet Preview

ADS7280 Datasheet

Analog-to-Digital Converter

No Preview Available !

ADS7279
ADS7280
SBAS436A – MAY 2008 – REVISED JUNE 2009 ............................................................................................................................................................... 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(1)
MODEL
ADS7279I
ADS7280I
MAXIMUM
INTEGRAL
LINEARITY
(LSB)
MAXIMUM
DIFFERENTIAL
LINEARITY
(LSB)
±1
±1
±1
±1
MAXIMUM
OFFSET
ERROR
(mV)
±1.25
±1.25
PACKAGE
TYPE
PACKAGE
TEMPERATURE
DESIGNATOR
RANGE
4 × 4 QFN-16
TSSOP-16
RSA
PW
–40°C to +85°C
4 × 4 QFN-16
TSSOP-16
RSA
PW
–40°C to +85°C
ORDERING
INFORMATION
ADS7279IRSAT
ADS7279IRSAR
ADS7279IPW
ADS7279IPWR
ADS7280IRSAT
ADS7280IRSAR
ADS7280IPW
ADS7280IPWR
TRANSPORT
MEDIA,
QUANTITY
Small tape and reel, 250
Tape and reel, 3000
Tube, 90
Tape and reel, 2000
Small tape and reel, 250
Tape and reel, 3000
Tube, 90
Tape and reel, 2000
(1) 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)
Over operating free-air temperature range, unless otherwise noted.
TA
Tstg
TJ max
Voltage
+IN to AGND
–IN to AGND
+VA to AGND
+REF to AGND
Voltage range –REF to AGND
+VBD to BDGND
AGND to BDGND
Digital input voltage to BDGND
Digital output voltage to BDGND
Operating free-air temperature range
Storage temperature range
Junction temperature
4 × 4 QFN-16
package
TSSOP-16
package
Power dissipation
θJA thermal impedance
Power dissipation
θJA thermal impedance
ADS7279, ADS7280
–0.3 to +VA + 0.3
–0.3 to +VA + 0.3
–0.3 to 7
–0.3 to +VA + 0.3
–0.3 to 0.3
–0.3 to 7
–0.3 to 0.3
–0.3 to +VBD + 0.3
–0.3 to +VBD + 0.3
–40 to +85
–65 to +150
+150
(TJmax – TA)/θJA
47
(TJmax – TA)/θJA
86
UNIT
V
V
V
V
V
V
V
V
V
°C
°C
°C
°C/W
°C/W
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
2
Submit Documentation Feedback
Copyright © 2008–2009, Texas Instruments Incorporated
Product Folder Link(s): ADS7279 ADS7280



Part Number ADS7280
Description Analog-to-Digital Converter
Maker etcTI
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