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ADS7881 Datasheet Preview

ADS7881 Datasheet

Low Power SAR Analog-Digital Converter

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ADS7881
SLAS400B − SEPTEMBER 2003 − REVISED NOVEMBER 2005
12ĆBIT, 4ĆMSPS
LOW POWER SAR ANALOGĆTOĆDIGITAL CONVERTER
FEATURES
D 4 MHz Sample Rate, 12-Bit Resolution
D Zero Latency
D Unipolar, Pseudo Differential Input, Range:
− 0 V to 2.5 V
D High Speed Parallel Interface
D 71 dB SNR and −88.5 dB THD at 1 MHz I/P
D Power Dissipation 95 mW at 4 MSPS
D Nap Mode (10 mW Power Dissipation)
D Power Down (10 mW)
D Internal Reference
D Internal Reference Buffer
D 48-Pin TQFP and QFN Packages
DESCRIPTION
The ADS7881 is a 12-bit 4-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.
APPLICATIONS
D Optical Networking (DWDM, MEMS Based
Switching)
D Spectrum Analyzers
D High Speed Data Acquisition Systems
D High Speed Close-Loop Systems
D Telecommunication
D Ultra-Sound Detection
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 and QFN packages.
+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
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 Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2003 − 2005, Texas Instruments Incorporated




Burr-Brown

ADS7881 Datasheet Preview

ADS7881 Datasheet

Low Power SAR Analog-Digital Converter

No Preview Available !

ADS7881
SLAS400B − SEPTEMBER 2003 − REVISED NOVEMBER 2005
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
MODEL
MAXIMUM
INTEGRAL
LINEARITY
(LSB)
MAXIMUM
DIFFERENTIAL
LINEARITY
(LSB)
NO MISSING
CODES AT
RESOLUTION
(BIT)
PACKAGE
TYPE
PACKAGE
DESIGNATOR
TEMPERATURE
RANGE
ORDERING
INFORMATION
TRANSPORT
MEDIA QUANTITY
±1
±1
ADS7881
±1
±1
48-Pin
ADS7881IPFBT
Tape and reel
250
12
TQFP
PFB
−40°C to 85°C
ADS7881IPFBR
Tape and reel
1000
48-Pin
ADS7881IRGZT
Tape and reel
250
12
QFN
RGZ
−40°C to 85°C
ADS7881IRGZR
Tape and reel
2500
NOTE: For 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
over operating free-air temperature range(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 and QFN packages
Lead temperature, soldering
Power dissipation
θJA Thermal impedance
Vapor phase (60 sec)
Infrared (15 sec)
UNIT
−0.3 V to +VA + 0.1 V
−0.3 V to 0.5 V
−0.3 V to 7 V
−0.3 V to 7 V
−0.3 V to (+VBD + 0.3 V)
−0.3 V to (+VBD + 0.3 V)
−40°C to 85°C
−65°C to 150°C
150°C
(TJ Max–TA)/ θJA
86°C/W
215°C
220°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



Part Number ADS7881
Description Low Power SAR Analog-Digital Converter
Maker Burr-Brown
Total Page 3 Pages
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ADS7881 Datasheet PDF





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