LTC2345-18 Datasheet | Linear Technology

Features LTC2345-18 Octal, 18-Bit, 200ksps Differential Soft Span ADC with Wide Input mon Mode Range Description nn 200ksps per Channel Throughput nn Eight Simultaneous Sampling Channels nn ±5LSB INL (Maximum, ±4.096V Range) nn Guaranteed 18-Bit, No Missing Codes nn Differential, Wide mon Mode Range Inputs nn Per-Channel Soft Span Input Ranges: ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V ±5V, 0V to 5V, ±2.5V, 0V to 2.5V nn 91.8d B Single-Conversion SNR (Typical) nn - 113d B THD (Typical) at f IN = 2k Hz nn 102d B CMRR (Typical) at f IN = 200Hz nn Rail-to-Rail Input Overdrive Tolerance nn Guaranteed Operation to 125°C nn Integrated Reference and Buffer (4.096V) nn SPI CMOS (1.8V to 5V) and LVDS Serial I/O nn Internal Conversion Clock, No Cycle Latency nn 81m W Power Dissipation (Typical) nn 48-Lead (7mm x 7mm) QFN Package Applications nn Programmable Logic Controllers nn Industrial Process Control nn Medical Imaging nn High Speed Data Acquisition The LTC®2345-18 is an 18-bit, low noise 8-channel simultaneous sampling successive approximation register (SAR) ADC with differential, wide mon mode range inputs. Operating from a 5V low voltage supply and using the internal reference and buffer, each channel of this Soft Span TM ADC can be independently configured on a conversion-by-conversion basis to accept ±4.096, 0V to 4.096V, ±2.048V, or 0V to 2.048V signals. Individual channels may also be disabled to increase throughput on the remaining channels. The wide input mon mode range and 102d B CMRR of the LTC2345-18 analog inputs allow the ADC to directly digitize a variety of signals, simplifying signal chain design. This input signal flexibility, bined with ±5LSB INL, no missing codes at 18 bits, and 91.8d B SNR, makes the LTC2345-18 an ideal choice for many applications requiring wide dynamic range. The LTC2345-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces. Between one and eight lanes of data output may be employed in CMOS mode,...