Date: 22/02/2007

Linear's new 12/14 bit ADC simultaneously can take 6 inputs of 250 KSPS

Are you looking for a single ADC to simultaneously convert 6 analog inputs at maximum sampling rate of 250KSPS? New LTC2351-14 (14 bit resolution), and LTC2351-12(12 bit resolution) from Linear Technology are made to do this job. These two ADCs has six sample and hold circuits and a multiplexer and fed to single ADC of 1.5 MSPS conversion rate. There are two power down modes called nap mode and sleep mode. In nap mode it consumes 4.5 mW during which the internal 2.5 V reference is active and in sleep mode it consumes 12 uW with all the internal circuitry shut out. The number of inputs channels can be configured from 1 to 6 through a three input select line. As the inputs channels are reduced the sampling rate is rised.

Supply voltage : 3.3 V
Active mode power consumption: 16.5mW
Internal Reference of 2.5V
75dB SINAD
0V to 2.5V unipolar/±1.25V bipolar differential input range
3 wire serial interface
CMRR: 83dB at 100kHz

Package: 32-pin (5mm x 5mm) QFN package