Ultra-Tiny 16-Bit ADC Family's 0.5uA Shutdown

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
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
LTC245x Ultra-Tiny ADC Family
LTC2450 (30Hz),
LTC2450-1 (60Hz)
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