LTC2389-18 Datasheet | Linear Technology

18-Bit, 2.5Msps SAR ADC with Pin-Configurable Analog Input Range and 99.8d B SNR Features Description n 2.5Msps Throughput Rate n ±3LSB INL (Max) n Guaranteed 18-Bit, No Missing Codes n Pin-Configurable Analog Input Range: ±4.096V Fully Differential 0V to 4.096V Pseudo-Differential Unipolar ±2.048V Pseudo-Differential Bipolar n 99.8d B (Fully Differential)/95.2d B (Pseudo Differential) SNR (Typ) at f IN = 2k Hz n - 116d B (Fully Differential)/- 112d B (Pseudo Differential) THD (Typ) at f IN = 2k Hz n Guaranteed Operation to 125°C n Single 5V Supply n Internal 20ppm/°C (Max) Reference n Internal Reference Buffer n 162.5m W Power Dissipation at 2.5Msps n No Pipeline Delay, No Cycle Latency n 1.8V to 5V I/O Voltages n Parallel and Serial I/O Interface n 48-pin 7mm × 7mm LQFP and QFN Packages Applications n Medical Imaging n High Speed, Wide Dynamic Range Data Acquisition n Industrial Process Control n Instrumentation n ATE The LTC®2389-18 is a low noise, high speed 18-bit successive approximation register (SAR) ADC. Operating from a single 5V supply, the LTC2389-18 supports pinconfigurable fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V) analog input ranges, allowing it to interface with multiple signal chain formats without requiring additional level translation or signal conditioning. The LTC2389-18 achieves ±3LSB INL (maximum), no missing codes at 18-bits, and 99.8d B (fully differential)/ 95.2d B (pseudo differential) SNR (typical). The LTC2389-18 includes a precision internal 4.096V reference, with a guaranteed 0.5% initial accuracy and a ±20ppm/°C (maximum) temperature coefficient, as well as an internal reference buffer. Fast 2.5Msps throughput with no cycle latency in the parallel interface modes makes the LTC2389-18 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2389-18 dissipates...