ADC12020

Features:

. Internal sample-and-hold
. Outputs 2.5V to 5V compatible
. TTL/CMOS compatible input/outputs
. Power down mode
. On-chip reference buffer 


Application

. Image Processing Front End
. Instrumentation
. PC-Based Data Acquisition
. Fax Machines
. Wave form Digitizers
. Sonar/Radar
. DSP Front Ends 


Pinout




Specifications

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.

V_A, V_D ....................................................................................6.5V
V_DR VD................................................................................+0.3V
|V_AV_D|............................................................................. 100mV
Voltage on Any Input or Output Pin−0.3V to..........(V_A or V_D+0.3V)
Input Current at Any Pin (Note3)........................................ ±25mA
Package Input Current (Note3)........................................... ±50mA
Package Dissipation at T_A=25˚C See (Note4)
ESDSu sceptibility
Human Body Model (Note5) ..................................................2500V
Machine Model (Note5) ...........................................................250V
Soldering Temperature,
Infrared,10sec. (Note6) .........................................................235˚C
Storage Temperature ..............................................−65˚Cto+150˚C

Description

The ADC12020 is a monolithic CMOS analog-to-digital con-verter capable of converting analog input signals into 12-bit digital words at 20 Megasamples persecond(MSPS),mini-mum.Thisconverterusesadifferential,pipelinearchitecturewithdigitalerrorcorrectionandanon-chipsample-and-hold
circuit to minimize die size and power consumption while providing excellent dynamic performance.Operating on a single 5V power supply,this device consumesjust185mW at 20 MSPS,including the reference current.The Power Down feature reduces power consumption to 40 mW.

The differential inputs of ADC12020 provide a full scale input swing equal to 2V REF with the possibility of a single-ended input.Full use of the differential input is recommended for optimum performance.For ease of use,the buffered, high impedance, single-ended reference input is converted on-chip to a differ-ential reference for use by the processing circuitry. Output data format is 12-bit offset binary.

This device ADC12020 is available in the 32-lead LQFP package and will operate over the industrial temperature range of−40˚C to+85˚C.