Linear Technology LTC2145 analog-to-digital converters

Linear Technology Corp. has introduced a family of low power 14-bit and 12-bit, 25Msps to 125Msps analog-to-digital converters (ADCs) that dissipate less than 1mW per mega sample per second from a 1.8V supply , making them what the company says are the lowest power high speed ADCs on the market .

The LTC2145 family includes two-channel simultaneous sampling, parallel output ADCs, offering a choice of full-rate CMOS , or double data rate (DDR ) CMOS or DDR LVDS digital outputs with programmable digital output timing, programmable LVDS output current and optional LVDS output termination.  At 25Msps the 14-bit and 12-bit versions of the LTC2140 consume 24mW per channel, while the 125Msps LTC2145 consumes 95mW per channel.

At 14-bits, these devices achieve over 73.2dB SNR performance with 90dB of SFDR at baseband . At 12-bits, the SNR performance is better than 70.6dB . This ADC family offers a pin-compatible upgrade path to the low-power LTC2185 16-bit ADC family to provide a 3dB 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.

Key highlights :

  • 12-/14-Bit, 25Msps-125Msps ADCs
  • 73.2dB SNR, 90dB SFDR
    (14-bits 125Msps)
  • Low Power: 95mW/Ch at 125Msps
  • Single 1.8V Supply
  • Flexible Digital Interfaces:
    CMOS, DDR CMOS or DDR LVDS Outputs
  • Selectable Input Ranges:
    1VP-P to 2VP-P
  • 750MHz Full-Power Bandwidth S/H
  • Optional Data Output Randomizer
  • Optional Clock Duty Cycle Stabilizer
  • Shutdown & Nap Modes
  • Serial SPI Port for Configuration
  • 64-Pin (9mm x 9mm) QFN Package

Pricing : Starts at $10.95 each for the dual 12-bit 25Msps devices in 1,000-piece quantities.

Availability : Now.

Datasheet : LTC2145-12 and LTC2145-14

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