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ADS7882 Datasheet Preview

ADS7882 Datasheet

LOW POWER SAR ANALOG-TO-DIGITAL CONVERTER

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ADS7882
www.ti.com ........................................................................................................................................................................................... SLAS630 – DECEMBER 2008
12-BIT, 3-MSPS
LOW POWER SAR ANALOG-TO-DIGITAL CONVERTER
FEATURES
1
3-MHz Sample Rate, 12-Bit Resolution
Zero Latency
Unipolar, Pseudo Differential Input, Range:
– 0 V to 2.5 V
High-Speed Parallel Interface
69.5 dB SNR at 100 kHz I/P
Power Dissipation 85 mW at 3 MSPS
Nap Mode (10 mW Power Dissipation)
Power Down (10 µW)
Internal Reference
Internal Reference Buffer
48-Pin TQFP Package
APPLICATIONS
Optical Networking (DWDM, MEMS Based
Switching)
Spectrum Analyzers
High Speed Data Acquisition Systems
High Speed Close-Loop Systems
Telecommunication
Ultra-Sound Detection
DESCRIPTION
The ADS7882 is a 12-bit 3-MSPS A-to-D converter
with 2.5-V internal reference. The device includes a
capacitor based SAR A/D converter with inherent
sample and hold. The device offers a 12-bit parallel
interface with an additional byte mode that provides
easy interface with 8-bit processors. The device has
a pseudo-differential input stage.
The –IN swing of ±200 mV is useful to compensate
for ground voltage mismatch between the ADC and
sensor and also to cancel common-mode noise. With
nap mode enabled, the device operates at lower
power when used at lower conversion rates. The
device is available in 48-pin TQFP package.
+IN
+
−IN
_
REFIN
REFOUT
SAR
CDAC
Comparator
Output
Latches
and
3-State
Drivers
BYTE
12/8-Bit Parallel
Data Output Bus
CLOCK
2.5 V
Internal
Reference
Conversion
and
Control Logic
PWD/RST
A_PWD
CONVST
BUSY
CS
RD
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.
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, Texas Instruments Incorporated




etcTI

ADS7882 Datasheet Preview

ADS7882 Datasheet

LOW POWER SAR ANALOG-TO-DIGITAL CONVERTER

No Preview Available !

ADS7882
SLAS630 – DECEMBER 2008 ........................................................................................................................................................................................... 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
MAXIMUM
INTEGRAL
LINEARITY
ADS7882 ±4 LSB at 12 bit
MAXIMUM
DIFFERENTIAL
LINEARITY
±4 LSB at 12 bit
(±1 LSB at 10 bit)
NO MISSING
CODES AT
RESOLUTION
(BIT)
10
PACKAGE
TYPE
PACKAGE
DESIGNATOR
TEMPERATURE
RANGE
48-Pin
TQFP
PFB
–40°C to 85°C
ORDERING
INFORMATION
ADS7882IPFBT
ADS7882IPFBR
TRANSPORT
MEDIA QUANTITY
Tape and reel 250
Tape and reel 1000
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted) (1)
+IN to AGND
-IN to AGND
+VA to AGND
+VBD to BDGND
Digital input voltage to GND
Digital output to GND
Operating temperature range
Storage temperature range
Junction temperature (TJmax)
TQFP package
Power dissipation
θJA Thermal impedance
Vapor phase (60 sec)
Lead temperature, soldering
Infrared (15 sec)
VALUE
–0.3 to +VA + 0.1
–0.3 to 0.5
–0.3 to 7
–0.3 to 7
–0.3 to (+VBD + 0.3 V)
–0.3 to (+VBD + 0.3 V)
–40 to 85
–65 to 150
150
(TJ Max–TA)/ θJA
86
215
220
UNIT
V
V
V
V
V
V
°C
°C
°C
°C/W
°C
°C
(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
Product Folder Link(s): ADS7882
Copyright © 2008, Texas Instruments Incorporated



Part Number ADS7882
Description LOW POWER SAR ANALOG-TO-DIGITAL CONVERTER
Maker etcTI
Total Page 3 Pages
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