Document
ADS828
ADS828
SBAS126A – MARCH 2001
TM 10-Bit, 75MHz Sampling ANALOG-TO-DIGITAL CONVERTER
FEATURES
q HIGH SNR: 58dB q LOW POWER: 325mW q +3V/+5V LOGIC I/O COMPATIBLE q INTERNAL/EXTERNAL REFERENCE OPTION q SINGLE-ENDED OR DIFFERENTIAL ANALOG
INPUT q PROGRAMMABLE INPUT RANGE:
1Vp-p or 2Vp-p q LOW DNL: 0.4LSB q SINGLE +5V SUPPLY OPERATION q POWER DOWN: 20mW q SSOP-28 PACKAGE
APPLICATIONS
q HDTV VIDEO DIGITIZING q MEDICAL IMAGING q COMMUNICATIONS q TEST EQUIPMENT
+VS
ADS828
DESCRIPTION
The ADS828 is a pipeline, CMOS analog-to-digital converter that operates from a single +5V power supply. This converter provides excellent performance with a singleended input and can be operated with a differential input for added spurious performance. This high performance converter includes a 10-bit quantizer, high bandwidth track/ hold, and a high accuracy internal reference. It also allows for the user to disable the internal reference and utilize external references. This external reference option provides excellent gain and offset matching when used in multichannel applications or in applications where full scale range adjustment is required.
The ADS828 employs digital error correction techniques to provide excellent differential linearity for demanding imaging applications. Its low distortion and high SNR give the extra margin needed for medical imaging, communications, video, and test instrumentation. The ADS828 offers power dissipation of 325mW and also provides a power-down mode, thus reducing power dissipation to only 20mW.
The ADS828 is specified at a maximum sampling frequency of 75MHz and a single-ended input range of 1.5V to 3.5V. The ADS828 is available in a SSOP-28 package and is pin compatible with the 10-bit, 40MHz ADS822 and ADS825, and the 10-bit, 60MHz ADS823 and ADS826.
CLK
VDRV
Timing Circuitry
VIN
IN
IN
T/H
10-Bit Pipelined A/D Core
Error Correction
Logic
D0
3-State Outputs
•••
D9
CM
Internal
Reference
Optional External Reference
Int/Ext
PD OE
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.
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Copyright © 2001, Texas Instruments Incorporated
ABSOLUTE MAXIMUM RATINGS
+VS ....................................................................................................... +6V Analog Input ............................................................. –0.3V to (+VS + 0.3V) Logic Input ............................................................... –0.3V to (+VS + 0.3V) Case Temperature ......................................................................... +100°C Junction Temperature .................................................................... +150°C Storage Temperature ..................................................................... +150°C
ELECTROSTATIC DISCHARGE SENSITIVITY
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.
PACKAGE/ORDERING INFORMATION
PRODUCT
ADS828E "
PACKAGE
SSOP-28 "
PACKAGE DRAWING NUMBER
324 "
SPECIFIED TEMPERATURE
RANGE
–40°C to +85°C "
PACKAGE MARKING
ADS828E "
ORDERING NUMBER(1)
ADS828E ADS828E/1K
TRANSPORT MEDIA
Rails Tape and Reel
NOTES: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /1K indicates 1000 devices per reel). Ordering 1000 pieces of ADS828E/1K” will get a single 1000-piece Tape and Reel.
ELECTRICAL CHARACTERISTICS
At TA = full specified temperature range, single-ended input range = 1.5V to 3.5V, sampling rate = 75MHz, convert command clock = +3V, external reference unless otherwise noted.
PARAMETER
RESOLUTION
SPECIFIED TEMPERATURE RANGE
ANALOG INPUT Standard Single-Ended Input Range Optional Single-Ended Input Range Common-Mode Voltage Optional Differential Input Range Analog Input Bias Current Input Impedance Track-Mode Input Bandwidth
CONVERSION CHARACTERISTICS Sample Rate Data Latency
DYNAMIC CHARACTERISTICS Differential Linearity Error (largest code error)
f = 1MHz f = 10MHz No Missing Codes Integral Nonlinearity Error, f = 1MHz Spurious Free Dynamic Range(1) f = 1MHz f = 10MHz Two-Tone Intermodulation Distortion(3) f = 9.5MHz and 9.9MHz (–7dB each tone) Signal-to-Noise Ratio (SNR) f = 1MHz f = 10MHz Signal-.