LTC2470/LTC2472 Selectable 208sps/833sps, 16-Bit ADCs with 10ppm/C Max Precision Reference Fea T Descrip T n 16-Bit Resolution The LTC 2470/LTC2472 are small, 16-bit analog-to-digital n Internal, High Accuracy Reference10ppm/C (Max) converters with an integrated precision reference and n Single-Ended (LTC2470) or Differential (LTC2472) a selectable 208sps or 833sps output rate. They use a n Selectable 208sps/833sps Output Rate single 2.7V to 5.5V supply and communicate through a n 1mV Offset Error SPI Interface. The LTC2470 is single-ended with a 0V to n 0.01% Gain Error V input range and the LTC2472 is differential with a REF n Single Conversion Settling Time for Multiplexed V input range. Both ADCs include a 1.25V integrated REF Applications reference with 2ppm/C drift performance and 0.1% initial n Single-Cycle Operation with Auto Shutdown accuracy. The converters are available in a 12-pin DFN n 3.5mA (Typ) Supply Current 3mm 3mm package or an MSOP-12 package. They n 2A (Max) Sleep Current include an integrated oscillator and perform conversions n Internal OscillatorNo External Components with no latency for multiplexed applications. The LTC2470/ Required LTC2472 include a proprietary input sampling scheme n SPI Interface that reduces the average input current several orders of n Small 12-Lead, 3mm 3mm DFN and MSOP magnitude when compared to conventional delta sigma Packages converters. Following a single conversion, the LTC2470/LTC2472 a T automatically power down the converter and can also be n System Monitoring configured to power down the reference. When both the n Environmental Monitoring ADC and reference are powered down, the supply current n Direct Temperature Measurements is reduced to 200nA. n Instrumentation The LTC2470/LTC2472 include a user selectable 208sps n Industrial Process Control or 833sps output rate and due to a large oversampling n Data Acquisition ratio (8,192 at 208sps and 2,048 at 833sps) have relaxed n Embedded ADC Upgrades anti-aliasing requirements. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and No Latency is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6208279, 6411242, 7088280, 7164378. Typical a T V vs Temperature REF 1.2520 2.7V TO 5.5V 1.2515 0.1F 0.1F 0.1F 10F 1.2510 0.1F 1.2505 REFOUT COMP V CC + 1.2500 IN SCK 10k 10k SPI LTC2472 SDO 1.2495 INTERFACE IN CS 0.1F 1.2490 REF GND 10k R 1.2485 24702 TA01a 1.2480 50 30 10 10 30 50 70 90 TEMPERATURE (C) 24702 TA01b 24702fb For more information www.linear.com/LTC2470 1 REFERENCE OUTPUT VOLTAGE (V) ion pplica ions pplica ion uresLTC2470/LTC2472 a Te Maxi Mu M r a T (Notes 1, 2) Supply Voltage (V ) ................................... 0.3V to 6V Storage Temperature Range .................. 65C to 150C CC Analog Input Voltage Operating Temperature Range + (V , V , V , V , LTC2470C/LTC2472C ............................... 0C to 70C IN IN IN REF V , V ) ...........................0.3V to (V + 0.3V) LTC2470I/LTC2472I .............................40C to 85C COMP REFOUT CC Digital Voltage (V , V , V , V ) ................0.3V to (V + 0.3V) SDI SDO SCK CS CC p in c F T LTC2472 LTC2472 TOP VIEW TOP VIEW 1 12 V REFOUT CC REFOUT 1 12 V CC 2 GND COMP 11 COMP 2 11 GND 3 IN CS 10 13 CS 3 10 IN + GND + 4 IN SDI 9 SDI 4 9 IN SCK 5 8 REF SCK 5 8 REF SDO 6 7 GND 6 SDO 7 GND MS PACKAGE DD PACKAGE 12-LEAD PLASTIC MSOP 12-LEAD (3mm 3mm) PLASTIC DFN T = 125C, = 130C/W T = 125C, = 43C/W JMAX JA JMAX JA EXPOSED PAD (PIN 13) PCB GROUND CONNECTION OPTIONAL LTC2470 LTC2470 TOP VIEW TOP VIEW REFOUT 1 12 V CC REFOUT 1 12 V CC COMP 2 11 GND COMP 2 11 GND 3 10 GND CS 13 CS 3 10 GND GND 4 9 IN SDI SDI 4 9 IN 5 5 REF SCK 8 REF SCK 8 6 SDO 7 GND 6 7 SDO GND MS PACKAGE DD PACKAGE 12-LEAD PLASTIC MSOP 12-LEAD (3mm 3mm) PLASTIC DFN T = 125C, = 130C/W T = 125C, = 43C/W JMAX JA JMAX JA EXPOSED PAD (PIN 13) PCB GROUND CONNECTION OPTIONAL o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2470CDD PBF LTC2470CDD TRPBF LFPV 12-Lead Plastic (3mm 3mm) DFN 0C to 70C LTC2470IDD PBF LTC2470IDD TRPBF LFPV 12-Lead Plastic (3mm 3mm) DFN 40C to 85C LTC2470CMS PBF LTC2470CMS TRPBF 2470 12-Lead Plastic MSOP 0C to 70C LTC2470IMS PBF LTC2470IMS TRPBF 2470 12-Lead Plastic MSOP 40C to 85C LTC2472CDD PBF LTC2472CDD TRPBF LFGV 12-Lead Plastic (3mm 3mm) DFN 0C to 70C LTC2472IDD PBF LTC2472IDD TRPBF LFGV 12-Lead Plastic (3mm 3mm) DFN 40C to 85C 24702fb 2 For more information www.linear.com/LTC2470 ion or ion igura on ings bsolu