Konfigurerbar 18-bit SAR A/D konverter
Linear Technology præsenterer 18-bit, 1Msps, 8-kanals multiplexed SAR A/D-konverter med bemærkelsesværdige 100dB SNR performance (in english).
Linear Technology introduces the LTC2373-18, an 8-channel, 18-bit, 1Msps successive approximation register (SAR) ADC with exceptional 100dB SNR performance. The LTC2373-18 is equipped with a programmable sequencer that can store up to 16 control words for configuring the multiplexer (MUX) and input range.This provides the ability to easily mix and match fully differential and pseudo-differential input ranges with a variety of MUX channel configurations. Single-ended input signals may also be converted to the fully differential input range of the ADC core by sharing a single external driver circuit between the MUXOUT/ADCIN pins available on the device. This enables the user to achieve the full 100dB SNR performance of the ADC on eight single-ended inputs.
The LTC2373-18 leads a family of 16-/18-bit 8-channel multiplexed SAR ADCs that communicate over SPI-compatible interfaces, feature sample rates of 500ksps and 1Msps, and achieve 100dB SNR at 18 bits, and 96dB SNR at 16 bits with the ±4.096V fully differential input range. The LTC2373 family integrates a precision bandgap reference with low drift and guaranteed 20ppm/°C maximum temperature coefficient and a high performance reference buffer into a small 25mm² QFN-32 package. The device is powered from a single 5V supply and consumes only 40mW at 1Msps.
The LTC2373-18 is available today in commercial, industrial and automotive (-40°C to 125°C) temperature grades. The DC2071A evaluation board for the LTC2373 SAR ADC family is available at www.linear.com/demo or via a local Linear Technology sales office.
