Linear Technology LTC2165, LTC2195 and LTC2185 low-power ADC family

Click2Contact

Linear Technology has introduced three families of low-power 16-bit, 25 to 125 Msps analog-to-digital converters that dissipate about half the power of other 16-bit solutions.

The LTC2165 and LTC2185 families are single- and two-channel simultaneous sampling parallel ADCs, offering a choice of full-rate CMOS, or double data rate CMOS/LVDS digital outputs with programmable digital output timing, programmable LVDS output current and optional LVDS output termination.

The LTC2195 family includes two-channel, simultaneous sampling ADCs with serial LVDS outputs. Each ADC family offers a choice of pin-compatible converters, sampling from 25 to 125 Msps and optimised for the lowest power dissipation at the rated speed.

They include such features as digital output randomiser and alternate bit polarity mode that minimise digital feedback.

The low-power 16-bit ADCs enable designers to upgrade performance while maintaining portability in such applications as handheld test and instrumentation, radar/LIDAR, portable medical imaging, PET/SPECT scanners, smart antenna systems and a variety of low-power communication systems.

The dual LTC2185/LTC2195 and single LTC2165 consume 185 mW/channel at 125 Msps and offer signal to noise ratio performance of 76.8 dB and SFDR of 90 dB at baseband. Pin-compatible speed-grade options include 25, 40, 65, 80 and 105 Msps with power dissipation of 1.5 mW/Msps per channel.

Further power savings can be achieved by placing the devices in standby (20 mW) or shutdown (1 mW). Analog full power bandwidth of 550 MHz and ultralow jitter of 0.07 ps_RMS allows undersampling of IF frequencies with good noise performance.