LTC2391-16 16-Bit, 250ksps SAR ADC with 94dB SNR FEATURESDESCRIPTION n 250ksps Throughput Rate The LTC®2391-16 is a low noise, high speed 16-bit suc- n ±2LSB INL (Max) cessive approximation register (SAR) ADC. Operating n Guaranteed 16-Bit No Missing Codes from a single 5V supply, the LTC2391-16 supports a large n 94dB SNR (Typ) at fIN = 20kHz ±4.096V fully differential input range, making it ideal for n Guaranteed Operation to 125°C high performance applications which require maximum n Single 5V Supply dynamic range. The LTC2391-16 achieves ±2LSB INL n 1.8V to 5V I/O Voltages max, no missing codes at 16-bits and 94dB SNR (typ). n 95mW Power Dissipation The LTC2391-16 includes a precision internal reference n ±4.096V Differential Input Range with a guaranteed 0.5% initial accuracy and a ±20ppm/°C n Internal Reference (20ppm/°C Max) (max) temperature coeffi cient. Fast 250ksps throughput n No Pipeline Delay, No Cycle Latency with no cycle latency in both parallel and serial interface n Parallel and Serial Interface modes makes the LTC2391-16 ideally suited for a wide n Internal Conversion Clock variety of high speed applications. An internal oscillator n 48-Lead 7mm × 7mm LQFP and QFN Packages sets the conversion time, easing external timing con- siderations. The LTC2391-16 dissipates only 95mW at APPLICATIONS 250ksps, while both nap and sleep power-down modes are provided to further reduce power during inactive periods. n Medical Imaging L n , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear High Speed Data Acquisition Technology Corporation. All other trademarks are the property of their respective owners. n Digital Signal Processing n Industrial Process Control n Instrumentation n ATE TYPICAL APPLICATION16k Point FFT fS = 250ksps,f 5V 5V 1.8V TO 5V IN = 20kHz 0 SNR = 94dB 10μF 0.1μF 10μF 0.1μF 4.7μF –20 THD –103dB SINAD = 93.5dB –40 ANALOG INPUT SFDR = 104dB AVP DVP OVP PARALLEL 0V TO 4.096V –60 249Ω OR 16 BIT IN+ SERIAL –80 INTERFACE –100 LT6350 2200pF LTC2391-16 SER/PAR BYTESWAP AMPLITUDE (dBFS) –120 249Ω OB/2C IN– CS –140 SINGLE-ENDED- RD –160 TO-DIFFERENTIAL BUSY VCM REFIN REFOUT CNVST PD RESET GND OGND DRIVER 239116 TA01 –180 0 25 50 75 100 125 10μF 1μF SAMPLE CLOCK FREQUENCY (kHz) 239116 G08 239116fa 1
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