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LTC2338-18 - 18-Bit, 1Msps, ±10.24V True Bipolar, Fully Differential Input ADC with 100dB SNR

The LTC®2338-18 is a low noise, high speed 18-bit successive approximation register (SAR) ADC with fully differential inputs. Operating from a single 5V supply, the LTC2338-18 has a ±10.24V true bipolar input range, making it ideal for high voltage applications which require a wide dynamic range. The LTC2338-18 achieves ±4LSB INL maximum, no missing codes at 18-bits with 100dB SNR.

The LTC2338-18 has an onboard single-shot capable reference buffer and low drift (20ppm/°C max) 2.048V temperature compensated reference. The LTC2338-18 also 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 LTC2338-18 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2338-18 dissipates only 50mW and automatically naps between conversions, leading to reduced power dissipation that scales with the sampling rate. A sleep mode is also provided to reduce the power consumption of the LTC2338-18 to 300μW for further power savings during inactive periods.

Features 1Msps Throughput Rate ±4LSB INL (Max) Guaranteed 18-Bit No Missing Codes Fully Differential Inputs True Bipolar Input Ranges ±6.25V, ±10.24V, ±12.5V 100dB SNR (Typ) at fIN = 2kHz –115dB THD (Typ) at fIN = 2kHz Guaranteed Operation to 125°C Single 5V Supply Low Drift (20ppm/°C Max) 2.048V Internal Reference Onboard Single-Shot Capable Reference Buffer 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 Power Dissipation 50mW (Typ) 16-Lead MSOP Package Typical Application

Applications Programmable Logic Controllers Industrial Process Control High Speed Data Acquisition Portable or Compact Instrumentation ATE Packaging

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