MP8831AS 查看數據表（PDF） - Exar Corporation

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MP8831AS

Single 10-Bit ADC with Digitally Controlled References

Exar Corporation 

...the analog plus companyTM

MP8831

Single 10-Bit ADC with

Digitally Controlled References

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: 0.175V to 0.345V, with 6-Bit

Resolution

D Update Rate: Pixel-by-pixel

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

APPLICATIONS

July 1997–1

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 Accuracy

Compared to Software Corrections

D Reduced Part Count & System Cost

D Lower Power Consumption & Power Down for Battery

Applications

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.

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.

ORDERING INFORMATION

Part No.

MP8831AN

MP8831AS

Package

28 Lead 300 Mil PDIP

28 Lead 300 Mil JEDEC SOIC

Operating

Temperature Range

-40°C to +85°C

-40°C to +85°C

Rev. 1.00

E1996

EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017

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