參數(shù)資料
型號： DC798B
廠商： Linear Technology
文件頁數(shù)： 1/42頁
文件大?。?/td> 0K
描述： BOARD DELTA SIGMA ADC LTC2480
軟件下載： QuikEval System
設(shè)計(jì)資源： DC798B Design File
DC798B Schematic
標(biāo)準(zhǔn)包裝： 1
系列： QuikEval™
ADC 的數(shù)量： 1
位數(shù)： 16
采樣率（每秒）： 7.5
數(shù)據(jù)接口： MICROWIRE?，串行，SPI?
已用 IC / 零件： LTC2480
已供物品： 板
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更多...
LTC2480
2480fd
Typical applicaTion
FeaTures
applicaTions
DescripTion
16-Bit
Σ ADC with Easy Drive
Input Current Cancellation
The LTC2480 combines a 16-bit plus sign No Latency
Σanalog-to-digitalconverterwithpatentedEasyDrive
technology. The patented sampling scheme eliminates
dynamic input current errors and the shortcomings of on-
chipbufferingthroughautomaticcancellationofdifferential
inputcurrent.Thisallowslargeexternalsourceimpedances
and input signals, with rail-to-rail input range to be directly
digitized while maintaining exceptional DC accuracy.
The LTC2480 includes on-chip programmable gain, a
temperature sensor and an oscillator. The LTC2480 can
be configured to provide a programmable gain from 1
to 256 in 8 steps, measure an external signal or internal
temperaturesensorandrejectlinefrequencies.50Hz,60Hz
or simultaneous 50Hz/60Hz line frequency rejection can
be selected as well as a 2x speed-up mode.
The LTC2480 allows a wide common mode input range
(0V to VCC) independent of the reference voltage. The
reference can be as low as 100mV or can be tied directly
to VCC. The LTC2480 includes an on-chip trimmed oscil-
lator eliminating the need for external crystals or oscil-
lators. Absolute accuracy and low drift are automatically
maintained through continuous, transparent, offset and
full-scale calibration.
+FS Error vs RSOURCE at IN+ and IN–
n
Easy Drive Technology Enables Rail-to-Rail Inputs
with Zero Differential Input Current
n
Directly Digitizes High Impedance Sensors with
Full Accuracy
n
Programmable Gain from 1 to 256
n
Integrated Temperature Sensor
n
GND to VCC Input/Reference Common Mode Range
n
Programmable 50Hz, 60Hz or Simultaneous
50Hz/60Hz Rejection Mode
n
2ppm (0.25LSB) INL, No Missing Codes
n
1ppm Offset and 15ppm Full-Scale Error
n
Selectable 2x Speed Mode (15Hz Using Internal
Oscillator)
n
No Latency: Digital Filter Settles in a Single Cycle
n
Single Supply 2.7V to 5.5V Operation
n
Internal Oscillator
n
Available in a Tiny (3mm
× 3mm) 10-Lead
DFN Package and 10-Lead MSOP Package
n
Direct Sensor Digitizer
n
Weight Scales
n
Direct Temperature Measurement
n
Strain Gauge Transducers
n
Instrumentation
n
Industrial Process Control
n
DVMs and Meters
L
, LT, LTC and LTM, Linear Technology and the Linear logo are registered trademarks and
No Latency
Σ and Easy Drive are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Patents pending.
RSOURCE ()
1
+FS
ERROR
(ppm)
–20
0
20
1k
100k
2480 TA04
–40
–60
–80
10
100
10k
40
60
80
VCC = 5V
VREF = 5V
VIN+ = 3.75V
VIN– = 1.25V
fO = GND
TA = 25°C
CIN = 1F
LTC2480
VIN+
VREF
VCC
GND
fO
VIN–
1F
SDO
4-WIRE
SPI INTERFACE
10k
IDIFF = 0
10k
SCK
2480 TA01
CS
SDI
0.1F
SENSE
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