LTC2368-24 24-Bit, 1Msps, Pseudo- Differential Unipolar SAR ADC with Integrated Digital Filter FEATURES DESCRIPTION n Guaranteed 24-Bits No Missing Codes The LTC 2368-24 is a low noise, low power, high speed n 0.5ppm INL (Typ) 24-bit successive approximation register (SAR) ADC with n Integrated Digital Filter with Real-Time Averaging an integrated digital averaging filter. Operating from a n Low Power: 21mW at 1Msps 2.5V supply, the LTC2368-24 has a 0V to V pseudo- REF n 98dB SNR (Typ) at 1Msps differential unipolar input range with V ranging from REF n 140dB Dynamic Range (Typ) at 15.25sps 2.5V to 5.1V. The LTC2368-24 consumes only 21mW n 116dB THD (Typ) at f = 2kHz (Typ) and achieves 4.5ppm INL maximum and no miss- IN n 50Hz/60Hz Rejection ing codes at 24 bits. n Guaranteed Operation to 85C The LTC2368-24 has an easy to use integrated digital n Single 2.5V Supply averaging filter that can average 1 to 65536 conversion n Pseudo-Differential Unipolar Input Range: 0V to V REF results real-time, dramatically improving dynamic range n 1.8V to 5V SPI-Compatible Serial I/O with Daisy- from 98dB at 1Msps to 140dB at 15.25sps. No separate Chain Mode programming interface or configuration register is required. n 16-Lead MSOP and 4mm 3mm DFN Packages The high speed SPI-compatible serial interface supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring a daisy- APPLICATIONS chain mode. The LTC2368-24 automatically powers down n Seismology between conversions, reducing power dissipation at lower n Energy Exploration sampling rates. n Medical Imaging L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property n High Speed Data Acquisition of their respective owners. Protected by U.S. Patents, including 7705765, 7961132, 8319673, 8810443 and Patents pending. n Industrial Process Control n ATE TYPICAL APPLICATION Integral Nonlinearity vs Output Code 4.0 2.5V 1.8V TO 5V 3.0 10F 0.1F 2.0 V REF + 1.0 V OV DD DD 10 CHAIN 0V + LT6202 IN RDL/SDI 0 SDO 3.3nF LTC2368-24 SCK 1.0 IN BUSY CNV SAMPLE CLOCK 2.0 REF REF GND 236824 TA01 3.0 2.5V TO 5.1V 47F 4.0 (X7R, 1210 SIZE) 0 4194304 8388608 12582912 16777216 OUTPUT CODE 236824 TA01b 236824f 1 For more information www.linear.com/LTC2368-24 INL ERROR (ppm)LTC2368-24 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Supply Voltage (V ) ...............................................2.8V Digital Output Voltage DD Supply Voltage (OV ) ................................................6V (Note 3) .......................... (GND 0.3V) to (OV + 0.3V) DD DD Reference Input (REF) .................................................6V Power Dissipation .............................................. 500mW Analog Input Voltage (Note 3) Operating Temperature Range + IN , IN .............................(GND 0.3V) to (REF + 0.3V) LTC2368C ................................................ 0C to 70C Digital Input Voltage LTC2368I .............................................40C to 85C (Note 3) .......................... (GND 0.3V) to (OV + 0.3V) Storage Temperature Range .................. 65C to 150C 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 + GND 3 14 SDO IN 4 13 SCK 17 + IN 4 13 SCK GND IN 5 12 RDL/SDI IN 5 12 RDL/SDI GND 6 11 BUSY GND 6 11 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 LTC2368CMS-24 PBF LTC2368CMS-24 TRPBF 236824 16-Lead Plastic MSOP 0C to 70C LTC2368IMS-24 PBF LTC2368IMS-24 TRPBF 236824 16-Lead Plastic MSOP 40C to 85C LTC2368CDE-24 PBF LTC2368CDE-24 TRPBF 23684 16-Lead (4mm 3mm) Plastic DFN 0C to 70C LTC2368IDE-24 PBF LTC2368IDE-24 TRPBF 23684 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. For more information on lead free part marking, go to: