News Release ⎜ www.linear.com Ultra-Tiny 16-Bit ADC Family’s 0.5uA Shutdown Current Ideal for Portable Sensor Applications MILPITAS, CA – April 23, 2008 – Linear Technology Corporation introduces the LTC2451 and LTC2452, a pair of 16-bit delta sigma ADCs with 0.5uA (max) shutdown current in ultra-tiny 3mm x 2mm DFN packages. Their low power, tiny size, and guaranteed 16-bit no missing code resolution makes these ADCs ideal for battery-powered applications such as remote sensors. Operating from a single 2.7V to 5.5V supply, these ADCs are designed to measure single-ended or differential sensors via either I2C or SPI serial interfaces. The LTC2451 communicates via I2C and can measure a single-ended input between 0V to VCC, whereas LTC2452 communicates via SPI and is capable of measuring a differential input up to ±VCC. The LTC2451 and LTC2452 join the previously released LTC2450 (SPI, single-ended input) and LTC2453 (I2C, differential input), thereby offering a complete ultra-tiny 16-bit ADC family. The versatile LTC2451/LTC2452 achieve excellent 16-bit DC performance of 2LSB integral nonlinearity error, 1.4uVRMS transition noise and 0.01% gain error. These ADCs have an internal oscillator and allow up to 60 conversions per second, making it easy to measure temperature, pressure, voltage, or other low-frequency sensor outputs. The LTC2451 draws 0.7mA (max) supply current and the LTC2452 1.2mA (max) at the 60Hz maximum sample rate. After each conversion, the ADC enters a shutdown mode, reducing supply current to less than 0.5uA (max). By sampling only occasionally, as many portable sensors do, the supply current is dramatically reduced. For example, the LTC2451/LTC2452 dissipate just 40uW from a 3V Ultra-Tiny 16-Bit ADC Family’s 0.5uA Shutdown Current Ideal for Portable Sensor Applications page 2 supply when sampling the ADC only once per second. The LTC2451/LTC2452 also incorporate a proprietary input sampling network that reduces the dynamic input current to less than 50nA, making a wide range of external input protection and filter circuits possible. The LTC2451 and LTC2452 are each offered in 8-pin ultra-tiny 3mm x 2mm DFN packages. They are available today in both commercial and industrial temperature grade versions today. Pricing for the LTC2451 begins at $1.15 and the LTC2452 at $1.25, each in 1,000-piece quantities. LTC245x Ultra-Tiny ADC Family I/O Single-Ended Differential SPI LTC2450 (30Hz), LTC2450-1 (60Hz) LTC2452 I2C LTC2451 LTC2453 Photo Caption: Complete SPI/I2C Single-Ended/Differential Ultra-Tiny 16-Bit ADC Family Summary of Features: LTC2451/LTC2452 • • • • • • • • • • • • • • • ±VCC Differential Input Range (LTC2452/LTC2453) 0V to VCC Single-Ended Input Range (LTC2450/LTC2451) I2C-Compatible 2-Wire Interface (LTC2451/LTC2453) SPI-Compatible 3-Wire Interface (LTC2450/LTC2452) Extremely Low 50nA Dynamic Input Current Ultra-Tiny 3mm × 2mm DFN Package 2LSB INL, No Missing Codes 4LSB Full-Scale Error Single Supply 2.7 to 5.5V Operation 1.4uVRMS Noise Low Power: 700uA at 60Hz Output Rate (LTC2451) 10uA at 1Hz Output Rate <1uA Sleep Current Internal Oscillator – No External Components Required Single Conversion Settling Time for Multiplexed Applications Single Cycle Operation with Auto Shutdown 60Hz Conversion Rate Ultra-Tiny 16-Bit ADC Family’s 0.5uA Shutdown Current Ideal for Portable Sensor Applications page 3 About Linear Technology Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, uModule™ products, and many other analog functions. Applications for Linear Technology’s high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems. For more information, visit www.linear.com. LT, LTC, LTM and are registered trademarks and uModule is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners. Press Contacts: John Hamburger, Director Marketing Communications [email protected] Tel: 408-432-1900 ext 2419 Doug Dickinson, Media Relations Manager [email protected] Tel: 408-432-1900 ext 2233