Datasheet LTC2453 (Analog Devices)

LTC2453 Ultra-Tiny, Differential, 16-Bit DS ADC With I2C Interface
FEATURES DESCRIPTION
■
±VCC Differential Input Range
The LTC®2453 is an ultra-tiny, fully differential, 16-bit, ■
16-Bit Resolution (Including Sign), No Missing Codes
analog-to-digital converter. The LTC2453 uses a single ■
2LSB Offset Error
2.7V to 5.5V supply and communicates through an I2C ■
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 ■ 800µA Supply Current LTC2453 includes a proprietary input sampling scheme ■ 0.2µA Sleep Current that reduces the average input sampling current several ■ Internal Oscillator—No External Components Required orders of magnitude lower than conventional delta-sigma ■ 2-Wire I2C 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 + – REF – VREF ). ■ 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 0.2µA. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. No Latency DS is a trademark of Linear Technology Corporation. If the user reads the ADC once a second, the LTC2453 con- All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6208279, 6411242, 7088280, 7164378. sumes an average of less than 50µW from a 2.7V supply.
TYPICAL APPLICATION Integral Nonlinearity, VCC = 3V
2.0 VCC = 3V + 1.5 VREF = 3V V – REF = 0V 2.7V TO 5.5V 1.0 0.1µF 10µF 0.5 TA = –45°C, 25°C, 90°C 0.1µF REF+ VCC IN+ SCL 0 10k 10k INL (LSB) 2-WIRE I2C –0.5 IN– LTC2453 SDA INTERFACE –1.0 10k R 0.1µF REF– GND –1.5 –2.0 2453 TA01 –3 –2 –1 0 1 2 3 DIFFERENTIAL INPUT VOLTAGE (V) 2453 TA01b 2453fc 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Analog Inputs And References Power Requirements I2C Inputs And Outputs I2C Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Application Package Description Revision History Related Parts