DC1925A-A demonstration circuit for the LTC2378-20 ADC. The LTC2378-20 is a low noise, low power, high speed 20bit successive approximation register (SAR) ADC. The LTC2378-20 has a high speed SPI compatible serial interface that supports 2.5V logic while also featuring a daisy chain mode. The fast 1Msps throughput with no cycle latency makes the LTC2378-20 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2378-20 automatically powers down between conversions, leading to reduced power dissipation that scales with the sampling rate. The LTC2378-20 features a unique digital gain compression (DGC) function, which eliminates the driver amplifier's negative supply while preserving the full resolution of the ADC.
- 1Msps throughput rate
- Low power of 21mW at 1Msps
- 2.5V supply
- Fully differential input range ±VREF
- VREF input range from 2.5V to 5.1V
- No pipeline delay, no cycle latency
- 1.8V to 5V I/O voltages
- SPI compatible serial I/O with daisy chain mode
- Internal conversion clock
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