LTC2372-18 Datasheet | Linear Technology

LTC2372-18 18-Bit, 500ksps, 8-Channel SAR ADC with 100d B SNR Features n 500ksps Throughput Rate n 18-Bit Resolution with No Missing Codes n 8-Channel Multiplexer with Selectable Input Range n Fully Differential (±4.096V) n Pseudo-Differential Unipolar (0V to 4.096V) n Pseudo-Differential Bipolar (±2.048V) n INL: ±2.75LSB (Maximum) n SNR: 100d B (Fully Differential)/95d B (Pseudo- Differential) (Typical) at f IN = 1k Hz n THD: - 110d B (Typical) at f IN = 1k Hz n Programmable Sequencer n Selectable Digital Gain pression n Single 5V Supply with 1.8V to 5V I/O Voltages n SPI-patible Serial I/O n Onboard 2.048V Reference and Reference Buffer n No Pipeline Delay, No Cycle Latency n Power Dissipation 27m W (Typical) n Guaranteed Operation to 125°C n32-Lead 5mm × 5mm QFN Package Applications n Programmable Logic Controllers n Industrial Process Control n High Speed Data Acquisition n Portable or pact Instrumentation n ATE Description The LTC®2372-18 is a low noise, high speed, 8-channel 18-bit successive approximation register (SAR) ADC. Operating from a single 5V supply, the LTC2372-18 has a highly configurable, low crosstalk 8-channel input multiplexer, supporting fully differential, pseudo-differential unipolar and pseudo-differential bipolar analog input ranges. The LTC2372-18 achieves ±2.75LSB INL (maximum) in all input ranges, no missing codes at 18-bits and 100d B (fully differential)/ 95d B (pseudo-differential) SNR (typical). The LTC2372-18 has an onboard low drift (20ppm/°C max) 2.048V temperature-pensated reference and a singleshot capable reference buffer. The LTC2372-18 also has a high speed SPI-patible serial interface that supports 1.8V, 2.5V, 3.3V and 5V logic through which a sequencer with a depth of 16 may be programmed. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2372-18 dissipates only 27m W and automatically naps between conversions, leading to reduced power...