ADCs integrate 10 ppm/°C max precision reference.
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Press Release Summary:
Housed in 3 x 3 mm DFN and 12-lead MSOP packages, Models LTC2470 and LTC2472 feature integrated 1.25 V reference that offers 2 ppm/°C drift and 0.1% initial accuracy for precise measurements in space-constrained applications. Both provide 16-bit no missing code resolution and selectable 250 S/sec or 1 kS/sec output rate. Operating from single 2.7-5.5 V supply, Models LTC2470 and LTC2472 measure single-ended or differential sensors, respectively, via SPI serial interface.
Original Press Release:
Selectable 250sps/1ksps 16-Bit ADC Integrates 10ppm/ºC Max Precision Reference
MILPITAS, CA - - Linear Technology Corporation introduces the LTC2470 and LTC2472, a pair of 16-bit delta sigma ADCs that integrate a high accuracy reference in tiny 3mm x 3mm DFN and 12-lead MSOP packages. The device's integrated 1.25V reference offers 2ppm/ºC drift performance and 0.1% initial accuracy for precise measurements in space-constrained applications. Both ADCs provide guaranteed 16-bit no missing code resolution and selectable 250sps or 1ksps output rate. The LTC2470 and LTC2472 are ideal for system and environmental monitoring and data acquisition systems requiring fast output rates.
Operating from a single 2.7V to 5.5V supply, these ADCs are designed to measure single-ended (LTC2470) or differential (LTC2472) sensors via an SPI serial interface. With its internal 1.25V reference, the LTC2470 can measure a single-ended input between 0V and 1.25V, while the LTC2472 is capable of measuring a differential input up to ±1.25V.
The versatile LTC2470/LTC2472 achieve excellent 16-bit DC performance of 2LSB (typ) integral nonlinearity error at 250sps, 3µVRMS transition noise and 0.25% gain error (max). An internal oscillator eliminates the need for external components to perform conversions.
The LTC2470/LTC2472 draw 3.5mA supply current during a conversion. After each conversion, the ADC enters a nap mode, reducing supply current to less than 1.5mA (max). Supply current can be further reduced by placing the converter in sleep mode to achieve less than 2µA(max). The LTC2470/LTC2472 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 LTC2470 and LTC2472 are each offered in small 12-pin 3mm x 3mm DFN and MSOP packages. They are available today in both commercial and industrial temperature grade versions. Pricing for the LTC2470 & LTC2472 begin at $1.70 each in 1,000-piece quantities. For more information, visit www.linear.com.
Ultra-Tiny ADC Family
Summary of Features: LTC2470/LTC2472
16-Bit Resolution, No Missing Codes
Internal Reference, (10ppm/ºC max)
Single-Ended (LTC2470) or Differential (LTC2472)
Selectable 250sps/1ksps Output Rate
1mV Offset Error
0.01% Gain Error
Single Conversion Settling Time for Multiplexed Applications
Single-Cycle Operation with Auto Shutdown:
o 3.5mA (typ) Supply Current
o 2µA (max) Sleep Current
Internal Oscillator-No External Components Required
SPI Interface
Small 12-Lead 3mm × 3mm DFN & MSOP Packages
16-Bit ADC with Selectable 250sps/1ksps Output Rate & 10ppm/ºC Max Internal Reference
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, µModule® 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, LTM, µModule and are registered trademarks of Linear Technology Corp. All other trademarks are the property of their respective owners.
Worldwide Contacts
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
