LTC2367-18 18-Bit, 500ksps, Pseudo- Differential Unipolar SAR ADC with 97dB SNR FEATURESDESCRIPTION n 500ksps Throughput Rate The LTC®2367-18 is a low noise, low power, high speed n ±2.5LSB INL (Max) 18-bit successive approximation register (SAR) ADC. n Guaranteed 18-Bit No Missing Codes Operating from a 2.5V supply, the LTC2367-18 has a 0V n Low Power: 6.8mW at 500ksps, 6.8µW at 500sps to VREF pseudo-differential unipolar input range with VREF n 97dB SNR (Typ) at fIN = 2kHz ranging from 2.5V to 5.1V. The LTC2367-18 consumes only n – 120dB THD (Typ) at fIN = 2kHz 6.8mW and achieves ±2.5LSB INL maximum, no missing n Guaranteed Operation to 125°C codes at 18 bits with 97dB SNR. n 2.5V Supply The LTC2367-18 has a high speed SPI-compatible se- n Pseudo-Differential Unipolar Input Range: 0V to VREF rial interface that supports 1.8V, 2.5V, 3.3V and 5V logic n VREF Input Range from 2.5V to 5.1V while also featuring a daisy-chain mode. The fast 500ksps n No Pipeline Delay, No Cycle Latency throughput with no cycle latency makes the LTC2367-18 n 1.8V to 5V I/O Voltages ideally suited for a wide variety of high speed applications. n SPI-Compatible Serial I/O with Daisy-Chain Mode An internal oscillator sets the conversion time, easing exter- n Internal Conversion Clock nal timing considerations. The LTC2367-18 automatically n 16-Lead MSOP and 4mm × 3mm DFN Packages powers down between conversions, leading to reduced power dissipation that scales with the sampling rate. APPLICATIONS L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n Medical Imaging SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7705765. n High Speed Data Acquisition n Portable or Compact Instrumentation n Industrial Process Control n Low Power Battery-Operated Instrumentation n ATE TYPICAL APPLICATION32k Point FFT fS = 500ksps, fIN = 2kHz 2.5V 1.8V TO 5V 0 SNR = 97.2dB –20 THD = –120dB 10µF 0.1µF SINAD = 97.1dB –40 SFDR = 122dB VREF + V –60 10Ω DD OVDD 0V CHAIN LT®6202 IN+ RDL/SDI –80 – SDO 10nF LTC2367-18 –100 SCK IN– BUSY –120 CNV SAMPLE CLOCK AMPLITUDE (dBFS) REF GND –140 236718 TA01a 2.5V TO 5.1V –160 47µF (X5R, 0805 SIZE) –180 0 50 100 150 200 250 FREQUENCY (kHz) 236718 TA01b 236718f 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Converter Characteristics Dynamic Accuracy Reference Input Digital Inputs And Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagram Applications Information Timing Diagrams Board Layout Package Description Typical Application Related Parts
