LTC2471/LTC2473 Selectable 208sps/833sps, 2 16-Bit I C ADCs with 10ppm/C Max Precision Reference FeaT DescripT n 16-Bit Resolution The LTC 2471/LTC2473 are small, 16-bit analog-to-digital n Internal, High Accuracy Reference10ppm/C (Max) converters with an integrated precision reference and n Single-Ended (LTC2471) or Differential (LTC2473) 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 an 2 n 1mV Offset Error I C Interface. The LTC2471 is single-ended with a 0V to n 0.01% Gain Error V input range and the LTC2473 is differential with a REF n Single Conversion Settling Time Simplifies V input range. Both ADCs include a 1.25V integrated REF Multiplexed 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 LTC2471/ Required LTC2473 include a proprietary input sampling scheme 2 n I C 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 LTC2471/LTC2473 Ta 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 LTC2471/LTC2473 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 of Linear Technology Corporation and Easy Drive 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 Ta 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 + 2 IN SCL 1.2500 I C 10k 10k INTERFACE LTC2473 SDA 1.2495 IN 0.1F 1.2490 REF 10k R AO GND 1.2485 24713 TA01a 1.2480 50 30 10 10 30 50 70 90 TEMPERATURE (C) 24713 TA01b 24713fb 1 For more information www.linear.com/LTC2471 REFERENCE OUTPUT VOLTAGE (V) ion pplica ions pplica ion uresLTC2471/LTC2473 Ta e MaxiMMu Tar (Notes 1, 2) Supply Voltage (V ) ................................... 0.3V to 6V Storage Temperature Range .................. 65C to 150C CC + Analog Input Voltage (V , V , Operating Temperature Range IN IN V , V , V , V ) ..........0.3V to (V + 0.3V) LTC2471C/LTC2473C ............................... 0C to 70C IN REF COMP REFOUT CC Digital Voltage (V , V , V ) ....0.3V to (V + 0.3V) LTC2471I/LTC2473I .............................40C to 85C SDA SCL AO CC in p Fc T LTC2473 LTC2473 TOP VIEW TOP VIEW 1 12 V REFOUT CC 1 REFOUT 12 V 2 GND CC COMP 11 2 11 GND COMP 3 IN AO 10 13 AO 3 10 IN + GND 4 IN + GND 9 GND 4 9 IN SCL 5 8 REF SCL 5 8 REF SDA 6 7 GND 6 SDA 7 GND DD PACKAGE MS PACKAGE 12-LEAD (3mm 3mm) PLASTIC DFN 12-LEAD PLASTIC MSOP T = 125C, = 130C/W T = 125C, = 43C/W JMAX JA JMAX JA EXPOSED PAD (PIN 13) PCB GROUND CONNECTION LTC2471 LTC2471 TOP VIEW TOP VIEW REFOUT 1 12 V CC REFOUT 1 12 V COMP 2 11 GND CC COMP 2 11 GND 3 10 GND AO 13 AO 3 10 GND GND 4 9 IN GND GND 4 9 IN 5 REF SCL 8 SCL 5 8 REF SDA 6 7 GND 6 7 SDA GND DD PACKAGE MS PACKAGE 12-LEAD (3mm 3mm) PLASTIC DFN 12-LEAD PLASTIC MSOP T = 125C, = 130C/W T = 125C, = 43C/W JMAX JA JMAX JA EXPOSED PAD (PIN 13) PCB GROUND CONNECTION Dro er Fni MTa LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2471CDD PBF LTC2471CDD TRPBF LFPW 12-Lead Plastic (3mm 3mm) DFN 0C to 70C LTC2471IDD PBF LTC2471IDD TRPBF LFPW 12-Lead Plastic (3mm 3mm) DFN 40C to 85C LTC2471CMS PBF LTC2471CMS TRPBF 2471 12-Lead Plastic MSOP 0C to 70C LTC2471IMS PBF LTC2471IMS TRPBF 2471 12-Lead Plastic MSOP 40C to 85C LTC2473CDD PBF LTC2473CDD TRPBF LFPX 12-Lead Plastic (3mm 3mm) DFN 0C to 70C LTC2473IDD PBF LTC2473IDD TRPBF LFPX 12-Lead Plastic (3mm 3mm) DFN 40C to 85C LTC2473CMS PBF LTC2473CMS TRPBF 2473 12-Lead Plastic MSOP 0C to 70C LTC2473IMS PBF LTC2473IMS TRPBF 2473 12-Lead Plastic MSOP 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: