This datasheet introduces the LTC2256-14/12 family of 14/12-bit, 25Msps to 150Msps ADCs. The family features a single 1.8V supply, flexible digital interface (CMOS, DDR CMOS, or DDR LVDS), selectable input ranges (1VP-P to 2VP-P), 800MHz full-power bandwidth S/H, optional data output randomizer, alternate bit polarity mode, optional clock duty cycle stabilizer, shutdown and nap modes, and serial SPI port for configuration.
The document introduces the LTC2262 family of pin-compatible ADCs featuring resolutions from 12 to 14 bits and sampling rates ranging from 25Msps to 150Msps. These devices operate on a single 1.8V supply and offer flexible digital interface options including CMOS, DDR CMOS, or DDR LVDS outputs.
Key features highlighted include selectable input ranges of 1VP-P to 2VP-P, an 800MHz full-power bandwidth sampling hold (S/H), and optional data output randomization to reduce digital feedback. The family also supports alternate bit polarity mode for noise reduction in small signal applications.
| Resolution | 14-Bit / 12-Bit |
|---|---|
| Sampling Rate | 25Msps to 150Msps |
| Supply Voltage | Single 1.8V Supply |
| Digital Interface Options | CMOS, DDR CMOS or DDR LVDS |
| Input Range | 1VP-P to 2VP-P |
| Full-Power Bandwidth S/H | 800MHz |
This proprietary feature inverts all odd bits before output buffers to equalize ones and zeroes, effectively canceling large ground plane currents that cause digital feedback.
The devices support selectable input ranges from 1VP-P to 2VP-P.
The 12-bit models provide an SNR of 70.6dB.