LTC2452 Ultra-Tiny, Differential, 16-Bit ADC with SPI Interface Fea T Descrip T n V Differential Input Range The LTC 2452 is an ultra-tiny, fully differential, 16-bit, CC n 16-Bit Resolution (Including Sign), No Missing analog-to-digital converter. The LTC2452 uses a single Codes 2.7V to 5.5V supply and communicates through an SPI n 2LSB Offset Error interface. The ADC is available in an 8-pin, 3mm 2mm n 4LSB Full-Scale Error DFN package or TSOT-23 package. It includes an integrated n 60 Conversions Per Second oscillator that does not require any external components. n Single Conversion Settling Time for Multiplexed It uses a delta-sigma modulator as a converter core and Applications has no latency for multiplexed applications. The LTC2452 n Single-Cycle Operation with Auto Shutdown includes a proprietary input sampling scheme that reduces n 800A Supply Current the average input sampling current several orders of n 0.2A Sleep Current magnitude when compared to conventional delta-sigma n Internal OscillatorNo External Components converters. Additionally, due to its architecture, there is Required negligible current leakage between the input pins. n SPI Interface The LTC2452 can sample at 60 conversions per second, n Ultra-Tiny 3mm 2mm DFN and TSOT-23 Packages and due to the very large oversampling ratio, has extremely relaxed anti-aliasing requirements. The LTC2452 includes a T continuous internal offset and full-scale calibration algo- n System Monitoring rithms which are transparent to the user, ensuring accuracy n Environmental Monitoring over time and over the operating temperature range. The n Direct Temperature Measurements converter has an external REF pin and the differential input n Instrumentation voltage range can extend up to V . REF n Industrial Process Control Following a single conversion, the LTC2452 can automati- n Data Acquisition cally enter a sleep mode and reduce its supply current to n Embedded ADC Upgrades less than 0.2A. If the user reads the ADC once a second, L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and No the LTC2452 consumes an average of less than 50W 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, from a 2.7V supply. 7088280, 7164378. Integral Nonlinearity, V = 3V Typical a T CC 3 2.7V TO 5.5V 2 0.1F 10F 0.1F REF V CC 1 + IN CS T = 45C, 25C, 90C A 10k 10k SCK 3-WIRE SPI 0 LTC2452 INTERFACE IN SDO 1 0.1F 10k R GND 2 2452 TA01a 3 3 2 1 0 1 2 3 DIFFERENTIAL INPUT VOLTAGE (V) 2452 TA01b 2452fd 1 For more information www.linear.com/LTC2452 INL (LSB) ion pplica ions pplica ion uresLTC2452 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 (V , V ) .0.3V to (V + 0.3V) Operating Temperature Range IN IN CC Reference Voltage (V ) ..............0.3V to (V + 0.3V) LTC2452C ................................................ 0C to 70C REF CC Digital Voltage (V , V , V ) .0.3V to (V + 0.3V) LTC2452I .............................................40C to 85C SDO SCK CS CC p c F T TOP VIEW TOP VIEW SCK 1 8 SDO SCK 1 8 SDO GND 2 7 CS GND 2 7 CS 9 + REF IN 3 6 + REF 3 6 IN V 4 5 IN CC V 4 5 IN CC TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 DD8 PACKAGE 8-LEAD (3mm 2mm) PLASTIC DFN C/I GRADE T = 125C, = 140C/W JMAX JA C/I GRADE T = 125C, = 76C/W JMAX JA EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB o r D i n F Ma T Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2452CDDB TRMPBF LTC2452CDDB TRPBF LDNJ 8-Lead Plastic (3mm 2mm) DFN 0C to 70C LTC2452IDDB TRMPBF LTC2452IDDB TRPBF LDNJ 8-Lead Plastic (3mm 2mm) DFN 40C to 85C LTC2452CTS8 TRMPBF LTC2452CTS8 TRPBF LTDPK 8-Lead Plastic TSOT-23 0C to 70C LTC2452ITS8 TRMPBF LTC2452ITS8 TRPBF LTDPK 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: