LTC2369-18 18-Bit, 1.6Msps, Pseudo- Differential Unipolar SAR ADC with 96.5dB SNR FEATURES DESCRIPTION n 1.6Msps Throughput Rate The LTC 2369-18 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 LTC2369-18 has a 0V n Low Power: 18mW at 1.6Msps, 18W at 1.6ksps pseudo-differential unipolar input range with V to V REF REF n 96.5dB SNR (Typ) at f = 2kHz ranging from 2.5V to 5.1V. The LTC2369-18 consumes only IN n 120dB THD (Typ) at f = 2kHz 18mW and achieves 2.5LSB INL maximum, no missing IN n Guaranteed Operation to 125C codes at 18 bits with 96.5dB SNR. n 2.5V Supply The LTC2369-18 has a high speed SPI-compatible serial n Pseudo-Differential Unipolar Input Range: 0V to V REF interface that supports 1.8V, 2.5V, 3.3V and 5V logic while n V Input Range from 2.5V to 5.1V REF also featuring a daisy-chain mode. The fast 1.6Msps n No Pipeline Delay, No Cycle Latency throughput with no cycle latency makes the LTC2369-18 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 LTC2369-18 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 = 1.6Msps, f = 2kHz S IN 0 2.5V 1.8V TO 5V SNR = 96.5dB 20 THD = 127dB SINAD = 96.5dB 10F 0.1F 40 SFDR = 134dB V REF 60 + V OV DD DD CHAIN 5.1 0V + 80 LT 6202 IN RDL/SDI SDO 100 10nF LTC2369-18 SCK BUSY IN 120 SAMPLE CLOCK CNV REF REF GND 140 236918 TA01a 2.5V TO 5.1V 160 47F (X5R, 0805 SIZE) 180 0 100 200 300 400 500 600 700 800 FREQUENCY (kHz) 236918 TA01b 236918f 1 AMPLITUDE (dBFS)LTC2369-18 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 LTC2369C ................................................ 0C to 70C Analog Input Voltage (Note 3) LTC2369I .............................................40C to 85C + IN , IN .........................(GND 0.3V) to (REF + 0.3V) LTC2369H .......................................... 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 w 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 LTC2369CMS-18 PBF LTC2369CMS-18 TRPBF 236918 16-Lead Plastic MSOP 0C to 70C LTC2369IMS-18 PBF LTC2369IMS-18 TRPBF 236918 16-Lead Plastic MSOP 40C to 85C LTC2369HMS-18 PBF LTC2369HMS-18 TRPBF 236918 16-Lead Plastic MSOP 40C to 125C LTC2369CDE-18 PBF LTC2369CDE-18 TRPBF 23698 16-Lead (4mm 3mm) Plastic DFN 0C to 70C LTC2369IDE-18 PBF LTC2369IDE-18 TRPBF 23698 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: