ADI LTC2378IDE-18#PBF

The LTC2378 - 18 is a low noise, low power, high speed 18 - bit successive approximation register (SAR) ADC. Operating from a 2.5V supply, the LTC2378 - 18 has a ±VREF fully differential input range with VREF ranging from 2.5V to 5.1V. The LTC2378 - 18 consumes only 13.5mW and achieves ±1.75 LSB INL maximum, no missing codes at 18 bits with 102dB SNR. The LTC2378 - 18 has a high speed SPI - compatible serial interface that supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring a daisy - chain mode. The fast 1Msps throughput with no cycle latency makes the LTC2378 - 18 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2378 - 18 automatically powers down between conversions, leading to reduced power dissipation that scales with the sampling rate. The LTC2378 - 18 features a unique digital gain compression (DGC) function, which eliminates the driver amplifier's negative supply while preserving the full resolution of the ADC. When enabled, the ADC performs a digital scaling function that maps zero - scale code from 0V to 0.1 · VREF and full - scale code from VREF to 0.9 · VREF. For a typical reference voltage of 5V, the full - scale input range is now 0.5V to 4.5V, which provides adequate headroom for powering the driving amplifier from a single 5.5V supply.

• 1Msps Throughput Rate
• ±1.75 LSB INL (Max)
• Guaranteed 18 - Bit No Missing Codes
• Low Power: 13.5mW at 1Msps, 13.5μW at 1ksps
• 102dB SNR (typ) at fIN = 2kHz
• • 124dB THD (typ) at fIN = 2kHz
• Digital Gain Compression (DGC)
• Guaranteed Operation to 125°C
• 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
• 16 - Lead MSOP and 4mm × 3mm DFN Packages

• Medical Imaging
• High Speed Data Acquisition
• Portable or Compact Instrumentation
• Industrial Process Control
• Low Power Battery - Operated Instrumentation
• ATE