LTC2453 Ultra-Tiny, Differential, 16-Bit DS ADC With 2 I C Interface FEATURES DESCRIPTION V Differential Input Range The LTC 2453 is an ultra-tiny, fully differential, 16-bit, CC 16-Bit Resolution (Including Sign), No Missing Codes analog-to-digital converter. The LTC2453 uses a single 2 2LSB Offset Error 2.7V to 5.5V supply and communicates through an I C 4LSB Full-Scale Error interface. The ADC is available in an 8-pin, 3mm 2mm DFN 60 Conversions Per Second package or 8-pin, 3mm 3mm TSOT package. It includes Single Conversion Settling Time for Multiplexed an integrated oscillator that does not require any external Applications components. It uses a delta-sigma modulator as a converter Single-Cycle Operation with Auto Shutdown core and has no latency for multiplexed applications. The 800A Supply Current LTC2453 includes a proprietary input sampling scheme 0.2A Sleep Current that reduces the average input sampling current several Internal OscillatorNo External Components Required orders of magnitude lower than conventional delta-sigma 2 2-Wire I C Interface converters. Additionally, due to its architecture, there is Ultra-Tiny 8-Pin 3mm 2mm DFN negligible current leakage between the input pins. and TSOT23 Packages The LTC2453 can sample at 60 conversions per second, and due to the very large oversampling ratio, has ex-tremely APPLICATIONS relaxed antialiasing requirements. The LTC2453 includes System Monitoring continuous internal offset and full-scale calibration algo- Environmental Monitoring rithms which are transparent to the user, ensuring accuracy Direct Temperature Measurements over time and over the operating temperature range. The + Instrumentation converter has external REF and REF pins and the differen- + Industrial Process Control tial input voltage range can extend up to (V V ). REF REF Data Acquisition Following a single conversion, the LTC2453 can auto-matically Embedded ADC Upgrades enter a sleep mode and reduce its power to less than 0.2A. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear If the user reads the ADC once a second, the LTC2453 con- Technology Corporation. No Latency DS is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents sumes an average of less than 50W from a 2.7V supply. including 6208279, 6411242, 7088280, 7164378. TYPICAL APPLICATION Integral Nonlinearity, V = 3V CC 2.0 V = 3V CC + V = 3V REF 1.5 V = 0V REF 2.7V TO 5.5V 1.0 0.1F 10F 0.5 T = 45C, 25C, 90C + A 0.1F REF V CC + IN 0 SCL 10k 10k 2 2-WIRE I C 0.5 LTC2453 IN SDA INTERFACE 1.0 0.1F 10k R REF GND 1.5 2.0 2453 TA01 3 2 1 1 2 3 0 DIFFERENTIAL INPUT VOLTAGE (V) 2453 TA01b 2453fc 1 INL (LSB)LTC2453 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Supply Voltage (V ) ................................... 0.3V to 6V Storage Temperature Range ................... 65C to 150C CC + Analog Input Voltage (V , V ) .. 0.3V to (V + 0.3V) Operating Temperature Range IN IN CC + Reference Voltage (V , V ) .. 0.3V to (V + 0.3V) LTC2453C ................................................ 0C to 70C REF REF CC Digital Voltage (SDA, SCL) ............ 0.3V to (V + 0.3V) LTC2453I.............................................. 40C to 85C CC PIN CONFIGURATION TOP VIEW TOP VIEW GND 1 8 SDA GND 1 8 SDA REF 2 7 SCL 9 REF 2 7 SCL + + REF 3 6 IN + + REF 3 6 IN V 4 5 IN CC V 4 5 IN CC TS8 PACKAGE DDB PACKAGE 8-LEAD PLASTIC TSOT-23 8-LEAD (3mm 2mm) PLASTIC DFN C/I GRADE T = 125C, = 140C/W JMAX JA = 125C, = 76C/W C/I GRADE T JMAX JA EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2453CDDB TRMPBF LTC2453CDDB TRPBF LDBQ 8-Lead Plastic (3mm 2mm) DFN 0C to 70C LTC2453IDDB TRMPBF LTC2453IDDB TRPBF LDBQ 40C to 85C 8-Lead Plastic (3mm 2mm) DFN LTC2453CTS8 TRMPBF LTC2453CTS8 TRPBF LTDCG 8-Lead Plastic TSOT-23 0C to 70C LTC2453ITS8 TRMPBF LTC2453ITS8 TRPBF LTDCG 8-Lead Plastic TSOT-23 40C to 85C TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on lead based finish parts. For more information on lead free part marking, go to: