Quad, 12-Bit + Sign, 5Msps/Ch Simultaneous Sampling ADC

The LTC2325-12 is a low noise, high speed quad 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 LTC2325-12 has an 8VP-P differential input range, making it ideal for applications which require a wide dynamic range with high common mode rejection. The LTC2325-12 achieves ±0.5LSB INL typical, no missing codes at 12 bits and 77dB SNR.

The LTC2325-12 has an onboard low drift (20ppm/°C max) 2.048V or 4.096V temperature-compensated reference. The LTC2325-12 also has a high speed SPI-compatible serial interface that supports CMOS or LVDS. The fast 5Msps per channel throughput with one cycle latency makes the LTC2325-12 ideally suited for a wide variety of high speed applications. The LTC2325-12 dissipates only 45mW per channel and offers nap and sleep modes to reduce the power consumption to 26μW for further power savings during inactive periods.

Applications

* High Speed Data Acquisition Systems

* Communications

* Optical Networking

* Multiphase Motor Control

* 5Msps/Ch Throughput Rate

* Four Simultaneously Sampling Channels

* Guaranteed 12-Bit, No Missing Codes

* 8VP-P Differential Inputs with Wide Input Common Mode Range

* 77dB SNR (Typ) at fIN = 2.2MHz

* –86dB THD (Typ) at fIN = 2.2MHz

* 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 45mW/Ch (Typ)

* Small 52-Lead (7mm × 8mm) QFN Package