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LTC2321-12 - Dual, 12-Bit + Sign, 2Msps Differential Input ADC with Wide Input Common Mode Range

The LTC®2321-12 is a low noise, high speed dual 12-bit + sign successive approximation register (SAR) ADC with differential inputs and wide input common mode range. Operating from a single 3.3V or 5V supply, the LTC2321-12 has an 8VP-P differential input range, making it ideal for applications which require a wide dynamic range with high common mode rejection. The LTC2321-12 achieves ±0.5LSB INL typical, no missing codes at 12 bits and 73dB SNR.

The LTC2321-12 has an onboard low drift (20ppm/°C max) 2.048V or 4.096V temperature-compensated reference. The LTC2321-12 also has a high speed SPI-compatible serial interface that supports CMOS or LVDS. The fast 2Msps per channel throughput with zero cycle latency makes the LTC2321-12 ideally suited for a wide variety of high speed applications. The LTC2321-12 dissipates only 30mW per channel and offers nap and sleep modes to reduce the power consumption to 5μW for further power savings during inactive periods.

Features 2Msps Throughput Rate ±0.5LSB INL (Typ) Guaranteed 12-Bit, No Missing Codes 8VP-P Differential Inputs with Wide Input Common Mode Range 73dB SNR (Typ) at fIN = 500kHz –85dB THD (Typ) at fIN = 500kHz Guaranteed Operation to 125°C Single 3.3V or 5V Supply Low Drift (20ppm/°C Max) 2.048V or 4.096V Internal Reference 1.8V to 2.5V I/O Voltages CMOS or LVDS SPI-Compatible Serial I/O Power Dissipation 30mW/Ch (Typ) Small 28-Lead (4mm × 5mm) QFN Package Typical Application

Applications High Speed Data Acquisition Systems Communications Remote Data Acquisition Imaging Optical Networking Automotive Multiphase Motor Control Packaging

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