LTC2450-1

1

24501fb

FEATURES

APPLICATIONS

DESCRIPTION

Easy-to-Use, Ultra-Tiny

16-Bit ΔΣ ADC

The LTC

to-digital converter designed for space constrained ap-

plications requiring 16-bit performance. The LTC2450-1

uses a single 2.7V to 5.5V supply, accepts a single-ended

analog input voltage, and communicates through an SPI

interface. It includes an integrated oscillator that does

not require any external components. The delta-sigma

modulator converter core provides single-cycle settling

time for multiplexed applications. The converter is avail-

able in a 6-pin, 2mm × 2mm DFN package. The LTC2450-1

implements a proprietary input sampling scheme that

reduces the average input sampling current several orders

of magnitude.

The LTC2450-1 is capable of up to 60 conversions per

second and, due to the very large oversampling ratio, has

extremely relaxed antialiasing requirements. The converter

uses its power supply voltage as the reference voltage and

the single-ended, rail-to-rail input voltage range extends

Following a conversion, the LTC2450-1 can automatically

enter a sleep mode and reduce its power to less than

500nA. At an output rate of 1Hz, the LTC2450-1 consumes

an average of less than 25μW from a 2.7V supply.

Applications

Required

Integral Nonlinearity

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Easy Drive

is a trademark of Linear Technology Corporation. All other trademarks are the property of their

respective owners. Protected by U.S. Patents including 6208279, 6411242, 7088280, 7164378.

SENSE

SCK

3-WIRE SPI

INTERFACE

SDO

LTC2450-1

GND

0.1μF

0.1μF

10μF

2.7 TO 5.5V

CLOSE TO

CHIP

1k

24501 TA01

CS

INPUT VOLTAGE (V)

0

–3.0

–2.0

–1.0

0

1.0

3.0

0.5

1.0

1.5

2.0

24501 G02

2.5

3.0

2.0

–2.5

–1.5

–0.5

0.5

2.5

1.5

TYPICAL APPLICATION