MP8831
...the analog plus company
TM
Single 10-Bit ADC with
Digitally Controlled References
July 1997–1
FEATURES
D
1.67 MSPS Sampling Rate
D
10 bit ADC with <
±
0.75 LSB DNL
D
Independent, Digitally Controlled ADC Offset & Full
Scale Adjustments
D
ADC Full Scale Range: 0V to 2.82V, with 10-Bit
Resolution
D
ADC Offset Range:
Resolution
D
Single 5V Supply
D
Low Power CMOS: 175mW (typ.)
D
Power Down Mode: 1.0mW (typ.)
D
Latch-up Free
D
ESD Protection to over 2000V
0.175V to 0.345V, with 6-Bit
APPLICATIONS
D
Precision B/W & Color CCD Scanners
D
Digital Copiers
D
Digital Cameras
D
Infra-Red Image Digitizers
BENEFITS
D
Improved Pixel-to-Pixel Calibration
Compared to Software Corrections
D
Reduced Part Count & System Cost
D
Lower Power Consumption & Power Down for Battery
Applications
Accuracy
D
Update Rate: Pixel-by-pixel
GENERAL DESCRIPTION
The MP8831 is a 1.67MSPS image digitizing chip that
includes a 10-bit A/D Converter with digitally controlled
references. This allows imaging systems to calibrate for
individual pixel offset and gain errors. The offset can be
adjusted from 0.175V to 0.345V in 64 steps (6 bit
resolution), while the full scale range (i.e. peak to peak
input range) is adjustable up to 2.82V in 1024 steps (10 bit
resolution).
The A/D converter uses a subranging architecture to
achieve high sample rates and low power consumption.
ORDERING INFORMATION
Operating
Temperature Range
-40°C to +85°C
-40°C to +85°C
Our patented comparator design performs an on chip
track & hold function with a low input capacitance. Our
proprietary high speed DAC design is used to drive and
update the ADC reference ladder at a 1.67MHz rate.
The MP8831 operates from a single +5V supply and an
external 1V reference. Power consumption is typically
only 180mW during conversion operation, and less than
1.0mW in power down mode. Specified for operation
between -40°C to +85°C, the MP8831 is available in 28
lead SOIC (JEDEC) and PDIP packages.
Part No.
MP8831AN
MP8831AS
Package
28 Lead 300 Mil PDIP
28 Lead 300 Mil JEDEC SOIC
Rev. 1.00
E1996
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538
z
(510) 668-7000
z
FAX (510) 668-7017
EXAR [ EXAR CORPORATION ]
