LTC2450CDC-1#PBF

更新时间： 2024-02-04 20:46:07

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凌特 - Linear		/
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20页	201K
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LTC2450CDC-1#PBF 数据手册

LTC2450-1

Easy-to-Use, Ultra-Tiny

16-Bit ΔΣ ADC

FEATURES

DESCRIPTION

The LTC^®2450-1 is a low power, ultra-tiny 16-bit analog-

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

reducestheaverageinputsamplingcurrentseveralorders

of magnitude.

GND to V Single-Ended Input Range

60 Conversions Per Second

0.02LSB RMS Noise

16-Bits, No Missing Codes

0.5mV Offset Error

4LSB Full-Scale Error

Single Conversion Settling Time for Multiplexed

Applications

Single Cycle Operation with Auto Shutdown

350μA Supply Current

50nA Sleep Current

Internal Oscillator—No External Components

Required

Single Supply, 2.7V to 5.5V Operation

SPI Interface

Ultra-Tiny, 2mm × 2mm DFN Package

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

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

extremelyrelaxedantialiasingrequirements.Theconverter

uses its power supply voltage as the reference voltage and

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

APPLICATIONS

from GND to V .

System Monitoring

Environmental Monitoring

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.

Direct Temperature Measurements

Instrumentation

Industrial Process Control

Data Acquisition

Embedded ADC Upgrades

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.

TYPICAL APPLICATION

Integral Nonlinearity

3.0

= V

REF

= 3V

2.5

2.0

2.7 TO 5.5V

1.5

10μF

0.1μF

1.0

0.5

= –45°C, 25°C, 90°C

CLOSE TO

CHIP

–0.5

–1.0

–1.5

–2.0

–2.5

–3.0

SCK

SDO

3-WIRE SPI

INTERFACE

LTC2450-1

GND

SENSE

0.1μF

24501 TA01

1.0

1.5

2.0

2.5

3.0

0.5

INPUT VOLTAGE (V)

24501 G02

24501fb

12 3 4 5 6 7...20

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