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ADC10321CIVT fiches techniques PDF

National Semiconductor - 10-Bit/ 20MSPS/ 98mW A/D Converter with Internal Sample and Hold

Numéro de référence ADC10321CIVT
Description 10-Bit/ 20MSPS/ 98mW A/D Converter with Internal Sample and Hold
Fabricant National Semiconductor 
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ADC10321CIVT fiche technique
January 2000
ADC10321
10-Bit, 20MSPS, 98mW A/D Converter with Internal
Sample and Hold
General Description
The ADC10321 is a low power, high performance CMOS
analog-to-digital converter that digitizes signals to 10 bits
resolution at sampling rates up to 25Msps while consuming
a typical 98mW from a single 5V supply. Reference force
and sense pins allow the user to connect an external refer-
ence buffer amplifier to ensure optimal accuracy. No missing
codes is guaranteed over the full operating temperature
range. The unique two stage architecture achieves 9.2 Effec-
tive Bits with a 10MHz input signal and a 20MHz clock fre-
quency. Output formatting is straight binary coding.
To ease interfacing to 3V systems, the digital I/O power pins
of the ADC10321 can be tied to a 3V power source, making
the outputs 3V compatible. When not converting, power con-
sumption can be reduced by pulling the PD (Power Down)
pin high, placing the converter into a low power standby
state, where it typically consumes less than 4mW. The
ADC10321’s speed, resolution and single supply operation
makes it well suited for a variety of applications in video, im-
aging, communications, multimedia and high speed data ac-
quisition. Low power, single supply operation ideally suit the
ADC10321 for high speed portable applications, and its
speed and resolution are ideal for charge coupled device
(CCD) input systems.
The ADC10321 comes in a space saving 32-pin TQFP and
operates over the industrial (−40˚C TA +85˚C) tempera-
ture range.
Features
n Internal Sample-and-Hold
n Single +5V Operation
n Low Power Standby Mode
n Guaranteed No Missing Codes
n Tri-State Outputs
n TTL/CMOS or 3V Logic Input/Output Compatible
Key Specifications
n Resolution
n Conversion Rate
n ENOB 10MHz Input
n DNL
n Conversion Latency
n PSRR
n Power Consumption
n Low Power Standby Mode
10 Bits
20 Msps
9.2 Bits (typ)
0.35 LSB (typ)
2 Clock Cycles
56dB
98mW (typ)
<4mW (typ)
Applications
n Digital Video
n Communications
n Document Scanners
n Medical Imaging
n Electro-Optics
n Plain Paper Copiers
n CCD Imaging
Connection Diagram
© 2000 National Semiconductor Corporation DS100897
DS100897-1
www.national.com

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