Features

• 1.6Msps Throughput Rate
• ±2.5LSB INL (Max)
• Guaranteed 18-Bit No Missing Codes
• Low Power: 18mW at 1.6Msps, 18μW at 1.6ksps
• 96.5dB SNR (Typ) at f_IN = 2kHz
• –120dB THD (Typ) at f_IN = 2kHz
• Guaranteed Operation to 125°C
• 2.5V Supply
• Pseudo-Differential Unipolar Input Range: 0V to V_REF
• V_REF 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

Typical Application

Description

The LTC®2369-18 is a low noise, low power, high speed 18-bit successive approximation register (SAR) ADC. Operating from a 2.5V supply, the LTC2369-18 has a 0V to V_REF pseudo-differential unipolar input range with V_REF ranging from 2.5V to 5.1V. The LTC2369-18 consumes only 18mW and achieves ±2.5LSB INL maximum, no missing codes at 18 bits with 96.5dB SNR.

The LTC2369-18 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 1.6Msps throughput with no cycle latency makes the LTC2369-18 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2369-18 automatically powers down between conversions, leading to reduced power dissipation that scales with the sampling rate.