LTC2364-18 18-Bit, 250ksps, Pseudo- Differential Unipolar SAR ADC with 97dB SNR FEATURES DESCRIPTION n 250ksps Throughput Rate The LTC 2364-18 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 LTC2364-18 has a 0V n Low Power: 3.4mW at 250ksps, 3.4W at 250sps pseudo-differential unipolar input range with V to V REF REF n 97dB SNR (Typ) at f = 2kHz ranging from 2.5V to 5.1V. The LTC2364-18 consumes only IN n 120dB THD (Typ) at f = 2kHz 3.4mW and achieves 2.5LSB INL maximum, no missing IN n Guaranteed Operation to 125C codes at 18 bits with 97dB SNR. n 2.5V Supply The LTC2364-18 has a high speed SPI-compatible se- n Pseudo-Differential Unipolar Input Range: 0V to V REF rial interface that supports 1.8V, 2.5V, 3.3V and 5V logic n V Input Range from 2.5V to 5.1V REF while also featuring a daisy-chain mode. The fast 250ksps n No Pipeline Delay, No Cycle Latency throughput with no cycle latency makes the LTC2364-18 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 LTC2364-18 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 APPLICATION 32k Point FFT f = 250ksps, f = 2kHz S IN 0 2.5V 1.8V TO 5V SNR = 97.2dB 20 THD = 121dB SINAD = 97.2dB 10F 0.1F 40 SFDR = 125dB V REF 60 + V OV DD DD CHAIN 10 0V + 80 LT 6202 IN RDL/SDI SDO 100 10nF LTC2364-18 SCK BUSY IN 120 SAMPLE CLOCK CNV REF REF GND 140 236418 TA01a 2.5V TO 5.1V 160 47F (X5R, 0805 SIZE) 180 0 25 50 75 100 125 FREQUENCY (kHz) 236418 TA01b 236418f 1 AMPLITUDE (dBFS)LTC2364-18 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Supply Voltage (V ) ...............................................2.8V Power Dissipation .............................................. 500mW DD Supply Voltage (OV ) ................................................6V Operating Temperature Range DD Reference Input (REF) .................................................6V LTC2364C ................................................ 0C to 70C Analog Input Voltage (Note 3) LTC2364I .............................................40C to 85C + IN , IN .........................(GND 0.3V) to (REF + 0.3V) LTC2364H .......................................... 40C to 125C Digital Input Voltage Storage Temperature Range .................. 65C to 150C (Note 3) .......................... (GND 0.3V) to (OV + 0.3V) DD Digital Output Voltage (Note 3) .......................... (GND 0.3V) to (OV + 0.3V) DD PIN CONFIGURATION TOP VIEW CHAIN 1 16 GND TOP VIEW V 2 15 OV DD DD CHAIN 1 16 GND GND 3 14 SDO V 2 15 OV DD DD + 17 GND 3 14 SDO IN 4 13 SCK + IN 4 13 SCK GND IN 5 12 RDL/SDI IN 5 12 RDL/SDI GND 6 11 GND 6 11 BUSY BUSY REF 7 10 GND REF 7 10 GND REF 8 9 CNV REF 8 9 CNV MS PACKAGE 16-LEAD PLASTIC MSOP DE PACKAGE 16-LEAD (4mm 3mm) PLASTIC DFN T = 150C, = 110C/W JMAX JA T = 150C, = 40C/W JMAX JA EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2364CMS-18 PBF LTC2364CMS-18 TRPBF 236418 16-Lead Plastic MSOP 0C to 70C LTC2364IMS-18 PBF LTC2364IMS-18 TRPBF 236418 16-Lead Plastic MSOP 40C to 85C LTC2364HMS-18 PBF LTC2364HMS-18 TRPBF 236418 16-Lead Plastic MSOP 40C to 125C LTC2364CDE-18 PBF LTC2364CDE-18 TRPBF 23648 16-Lead (4mm 3mm) Plastic DFN 0C to 70C LTC2364IDE-18 PBF LTC2364IDE-18 TRPBF 23648 16-Lead (4mm 3mm) Plastic DFN 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: