ADCs integrate 2-10 ppm/°C reference.

Press Release Summary:




Featuring internal 1.25 V reference, LTC2460 can measure single-ended input from 0-1.25 V, while LTC2462 can measure differential input up to ±1.25 V. Both offer 16-bit DC performance of 1LSB integral nonlinearity error, 2.2 µVrms transition noise, and 0.25% maximum gain error. Drawing 2.5 mA supply current at 60 Hz maximum sample rate, they operate up to 60 conversions/sec for use in temperature, pressure, and voltage sensing applications. Units are offered in 3 x 3 mm DFN package.



Original Press Release:



Tiny 16-Bit ADC Integrates 2ppm/°C Reference for Space-Constrained Sensor Applications



MILPITAS, CA - May 13, 2009 - Linear Technology introduces the LTC2460 and the LTC2462, a pair of 16-bit delta sigma ADCs that integrate a precision reference in a tiny 3mm x 3mm DFN package. The integrated reference (2ppm/°C Typ, 10ppm/°C Max) allows precise measurements and alleviates the need for an external reference, a key benefit for space-constrained applications. Both ADCs guarantee 16-bit no missing code resolution. This makes the LTC2460 and LTC2462 a complete solution for remote sensor battery-powered applications and industrial sensors monitoring temperature or pressure.

Operating from a single 2.7V to 5.5V supply, these ADCs are designed to measure single-ended (LTC2460) or differential (LTC2462) sensors via an SPI serial interface. With its internal 1.25V reference, the LTC2460 can measure a single-ended input from 0V to 1.25V, while the LTC2462 is capable of measuring a differential input up to ±1.25V.

The versatile LTC2460/LTC2462 achieve excellent 16-bit DC performance of 1LSB (Typ) integral nonlinearity error, 2.2uVRMS transition noise and 0.25% gain error (max). These ADCs have an internal oscillator, another space-saving feature. They operate up to 60 conversions per second, making it easy to measure temperature, pressure, voltage, or other low-frequency sensor signals.

The LTC2460/LTC2462 draw 2.5mA (max) supply current at the 60Hz maximum sample rate with the internal reference active. After each conversion, the ADC enters a shutdown mode, reducing supply current to less than 1.5mA (max). Supply current can be further reduced to less than 2uA (max) in sleep mode. The LTC2460/LTC2462 also incorporate a proprietary input sampling network that reduces the dynamic input current to less than 50nA, making possible a wide range of external input filter and protection circuits.

The LTC2460 and LTC2462 join a family that includes the previously released LTC2450 (single-ended input, VCC used as the reference) and LTC2452 (differential input, external reference required). The LTC2450/LTC2452 ADCs should be used for applications that need to measure input signals greater than 1.25V.

The LTC2460 and LTC2462 are each offered in 12-pin ultra-tiny 3mm x 3mm DFN and MSOP packages. They are available today in both commercial and industrial temperature grade versions. Pricing begins at $1.65 each in 1,000-piece quantities. For more information, visit www.linear.com.
Ultra-Tiny ADC Family

Summary of Features: LTC2460/LTC2462

16-Bit Resolution, No Missing Codes

Internal Reference, (10ppm/°C max)

Single-Ended (LTC2460) or Differential (LTC2462) Input

2LSB Offset Error

0.01% Gain Error

60 Conversions Per Second

Single Conversion Settling Time for Multiplexed Applications

Single-Cycle Operation with Auto Shutdown:

o 1.5mA (typ) Supply Current

o 2uA (max) Sleep Current

Internal Oscillator-No External Components Required

SPI Interface

Tiny 12-Lead 3mm x 3mm DFN & MSOP Packages

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(TM) 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.
LT, LTC and LTM are registered trademarks and uModule is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners.

Worldwide Contacts

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clotilde.zeller@zellercom.com

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