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參數(shù)資料
| 型號： | LTC2451ITSB#TRMPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 1-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO8 |
| 封裝： | LEAD FREE, PLASTIC, MO-193, TSOT-23, 8 PIN |
| 文件頁數(shù)： | 1/18頁 |
| 文件大?。?/td> | 245K |
| 代理商： | LTC2451ITSB#TRMPBF |
LTC2451
1
2451ff
TYPICAL APPLICATION
FEATURES
DESCRIPTION
Ultra-Tiny, 16-Bit DS ADC
with I2C Interface
The LTC2451 is an ultra-tiny, 16-bit, analog-to-digital
converter. The LTC2451 uses a single 2.7V to 5.5V
supply, accepts a single-ended analog input voltage and
communicates through an I2C interface. The converter
is available in an 8-pin, 3mm × 2mm DFN or TSOT-23
package. It includes an integrated oscillator that does not
require any external components. It uses a delta-sigma
modulator as a converter core and provides single-cycle
settling time for multiplexed applications. The LTC2451
includes a proprietary input sampling scheme that reduces
the average input sampling current several orders of
magnitude lower than conventional Δ∑ converters.
The LTC2451 is capable of up to 60 conversions per
second and, due to the very large oversampling ratio,
has extremely relaxed antialiasing requirements. In the
30Hz mode, the LTC2451 includes continuous internal
offset calibration algorithms which are transparent to the
user, ensuring accuracy over time and over the operating
temperature range. The converter has external REF+ and
REF– pins and the input voltage can range from VREF– to
VREF+. If VREF+ = VCC and VREF– = GND, the input voltage
can range from GND to VCC.
Following a single conversion, the LTC2451 can auto-
matically enter sleep mode and reduce its power to less
than 0.2μA. If the user reads the ADC once per second,
the LTC2451 consumes an average of less than 50μW
from a 2.7V supply.
n GND to VCC Single-Ended Input Range
n 0.02LSB RMS Noise
n 2LSB INL, No Missing Codes
n 1LSB Offset Error
n 4LSB Full-Scale Error
n Programmable 30/60 Conversions per Second
n Single Conversion Settling Time for Multiplexed
Applications
n Single-Cycle Operation with Auto Shutdown
n 400μA Supply Current
n 0.2μA Sleep Current
n Internal Oscillator—No External Components Required
n Single Supply, 2.7V to 5.5V Operation
n 2-Wire I2C Interface
n Ultra-Tiny 3mm × 2mm DFN or TSOT-23 Package
APPLICATIONS
n System Monitoring
n Environmental Monitoring
n Direct Temperature Measurements
n Instrumentation
n Industrial Process Control
n Data Acquisition
n Embedded ADC Upgrades
Integral Nonlinearity, VCC = 3V
SENSOR
SCL
2-WIRE I2C
INTERFACE
SDA
0.1μF
10μF
2.7V TO 5.5V
1k
IN
REF+
VCC
REF –
GND
LTC2451
2451 TA01a
0.1μF
INPUT VOLTAGE (V)
0
–3
INL
(LSB)
–2
–1
0
1
3
0.5
1
1.5
2
2451 TA01b
2.5
3
2
TA = – 45°C, 25°C
TA = 90°C
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. No Latency Δ∑ and Easy Drive are trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners. Protected by U.S.
Patents, including 6208279, 6411242, 7088280, 7164378.
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