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.
- 12-/14-Bit, 25Msps-125Msps ADCs
- 73.2dB SNR, 90dB SFDR
- 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.
Datasheet: LTC2145-12 and LTC2145-14