Linear Technology LTC2145 low-power ADC range

Linear Technology has introduced a family of ultralow-power 14 and 12 bit, 25 to 125 Msps analog-to-digital converters that dissipate less than 1 mW per mega sample per second from a 1.8 V supply.

The LTC2145 family includes two-channel simultaneous sampling, parallel output ADCs, offering a choice of full-rate CMOS or double data rate CMOS or DDR LVDS digital outputs with programmable digital output timing, programmable LVDS output current and optional LVDS output termination.

At 25 Msps the 14- and 12-bit versions of the LTC2140 consume 24 mW per channel, while the 125 Msps LTC2145 consumes 95 mW per channel.

AC performance has not been compromised. At 14 bits, these devices achieve over 73.2 dB SNR performance with 90 dB of SFDR at baseband. At 12 bits, the SNR performance is better than 70.6 dB.

The ADC family offers a pin-compatible upgrade path to the ultralow-power LTC2185 16-bit ADC family to provide a 3 dB performance upgrade while maintaining portability in such applications as handheld test and instrumentation, radar/LIDAR, medical imaging, PET/SPECT scanners, military radios, smart antenna systems and a range of low-power communication systems.

The devices incorporate the company’s digital output randomiser and alternate bit polarity mode feature for reduced digital feedback.