LTC2376-20 20-Bit, 250ksps, Low Power SAR ADC with 0.5ppm INL FEATURES DESCRIPTION n 250ksps Throughput Rate The LTC 2376-20 is a low noise, low power, high speed n 0.5ppm INL (Typ) 20-bit successive approximation register (SAR) ADC. Op- n Guaranteed 20-Bit No Missing Codes erating from a 2.5V supply, the LTC2376-20 has a V REF n fully differential input range with V ranging from 2.5V Low Power: 5.3mW at 250ksps, 5.3W at 250sps REF n to 5.1V. The LTC2376-20 consumes only 5.3mW and 104dB SNR (Typ) at f = 2kHz IN n achieves 2ppm INL maximum, no missing codes at 20 125dB THD (Typ) at f = 2kHz IN n bits with 104dB SNR. Digital Gain Compression (DGC) n Guaranteed Operation to 85C The LTC2376-20 has a high speed SPI-compatible serial n 2.5V Supply interface that supports 1.8V, 2.5V, 3.3V and 5V logic n Fully Differential Input Range V REF while also featuring a daisy-chain mode. The fast 250ksps n V Input Range from 2.5V to 5.1V REF throughput with no cycle latency makes the LTC2376-20 n No Pipeline Delay, No Cycle Latency ideally suited for a wide variety of high speed applications. n 1.8V to 5V I/O Voltages An internal oscillator sets the conversion time, easing exter- n SPI-Compatible Serial I/O with Daisy-Chain Mode nal timing considerations. The LTC2376-20 automatically n Internal Conversion Clock powers down between conversions, leading to reduced n 16-Lead MSOP and 4mm 3mm DFN Packages power dissipation that scales with the sampling rate. The LTC2376-20 features a unique digital gain compres- APPLICATIONS sion (DGC) function, which eliminates the driver amplifiers n Medical Imaging negative supply while preserving the full resolution of the n High Speed Data Acquisition ADC. When enabled, the ADC performs a digital scaling n Portable or Compact Instrumentation function that maps zero-scale code from 0V to 0.1 V REF n Industrial Process Control and full-scale code from V to 0.9 V . For a typical REF REF n Low Power Battery-Operated Instrumentation reference voltage of 5V, the full-scale input range is now n ATE 0.5V to 4.5V, which provides adequate headroom for L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and powering the driving amplifier from a single 5.5V supply. SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patents Pending. Protected by U.S. Patents, including 7705765, 7961132, 8319673. TYPICAL APPLICATION Integral Nonlinearity vs Output Code 2.0 2.5V 1.8V TO 5V 1.5 10F 0.1F 1.0 V OV CHAIN 6800pF DD DD 0.5 V REF 10 RDL/SDI + + IN SDO 0 0V 3300pF LTC2376-20 SCK V REF BUSY 0.5 IN CNV SAMPLE CLOCK 10 0V 6800pF REF/DGC V 1.0 REFREF GND REF 237620 TA01 2.5V TO 5.1V 1.5 47F 2.0 (X7R, 1210 SIZE) 0 262144 524288 786432 1048576 OUTPUT CODE 237620 TA02 237620fa 1 For more information www.linear.com/LTC2376-20 INL ERROR (ppm)LTC2376-20 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) LTC2376C ................................................ 0C to 70C REF/DGC Input (Note 3) ....(GND 0.3V) to (REF + 0.3V) LTC2376I .............................................40C to 85C Digital Input Voltage Storage Temperature Range .................. 65C to 150C (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 + GND 3 14 SDO IN 4 17 13 SCK + 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/DGC 8 9 CNV REF/DGC 8 9 CNV MS PACKAGE 16-LEAD PLASTIC MSOP DE PACKAGE T = 150C, = 110C/W 16-LEAD (4mm 3mm) PLASTIC DFN 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 LTC2376CMS-20 PBF LTC2376CMS-20 TRPBF 237620 16-Lead Plastic MSOP 0C to 70C LTC2376IMS-20 PBF LTC2376IMS-20 TRPBF 237620 16-Lead Plastic MSOP 40C to 85C LTC2376CDE-20 PBF LTC2376CDE-20 TRPBF 23760 16-Lead (4mm 3mm) Plastic DFN 0C to 70C LTC2376IDE-20 PBF LTC2376IDE-20 TRPBF 23760 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: