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參數資料
| 型號： | LTC2485 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Easy-to-Use, Ultra-Tiny 16-Bit ADC |
| 中文描述： | 易于使用，超微型16位ADC |
| 文件頁數： | 1/20頁 |
| 文件大小： | 212K |
| 代理商： | LTC2485 |
LTC2450-1
1
24501fb
FEATURES
APPLICATIONS
DESCRIPTION
Easy-to-Use, Ultra-Tiny
16-Bit
ΔΣ
ADC
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
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
from GND to V
CC
.
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.
n
GND to V
CC
Single-Ended Input Range
n
60 Conversions Per Second
n
0.02LSB RMS Noise
n
16-Bits, No Missing Codes
n
0.5mV Offset Error
n
4LSB Full-Scale Error
n
Single Conversion Settling Time for Multiplexed
Applications
n
Single Cycle Operation with Auto Shutdown
n
350μA Supply Current
n
50nA Sleep Current
n
Internal Oscillator—No External Components
Required
n
Single Supply, 2.7V to 5.5V Operation
n
SPI Interface
n
Ultra-Tiny, 2mm
×
2mm DFN Package
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
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
V
IN
3-WIRE SPI
INTERFACE
SDO
LTC2450-1
GND
0.1
μ
F
0.1
μ
F
10
μ
F
2.7 TO 5.5V
V
CC
CLOSE TO
CHIP
1k
24501 TA01
CS
INPUT VOLTAGE (V)
0
–3.0
I
–2.0
–2.5
–1.0
–1.5
0
1.0
0.5
3.0
2.5
0.5
1.0
1.5
2.0
24501 G02
2.5
3.0
2.0
1.5
–0.5
V
CC
= V
REF
= 3V
T
A
= –45
°
C, 25
°
C, 90
°
C
TYPICAL APPLICATION
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