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參數資料
| 型號： | DC941A |
| 廠商： | Linear Technology |
| 文件頁數： | 1/32頁 |
| 文件大小： | 0K |
| 描述： | BOARD DELTA SIGMA ADC LTC2482 |
| 軟件下載： | QuikEval System |
| 設計資源： | DC941A Design File DC941A Schematic |
| 標準包裝： | 1 |
| 系列： | Easy Drive™, QuikEval™ |
| ADC 的數量： | 1 |
| 位數： | 16 |
| 采樣率（每秒）： | 6.8 |
| 數據接口： | MICROWIRE?，串行，SPI? |
| 工作溫度： | 0°C ~ 70°C |
| 已用 IC / 零件： | LTC2482 |
| 已供物品： | 板 |
| 相關產品： | LTC2482IDD#TRPBF-ND - IC ADC 16BIT 10-DFN LTC2482CDD#TRPBF-ND - IC ADC 16BIT 10-DFN LTC2482IDD#PBF-ND - IC ADC 16BIT 10-DFN LTC2482CDD#PBF-ND - IC ADC 16BIT 10-DFN |
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LTC2482
1
2482fc
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
16-Bit
ΔΣ ADC with
Easy Drive Input Current
Cancellation
+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 600nV RMS Noise, Independent of VREF
n Operates with a Reference as Low as 100mV with
16-Bit Resolution
n GND to VCC Input/Reference Common Mode Range
n Simultaneous 50Hz/60Hz Rejection Mode
n 2ppm INL, No Missing Codes
n 1ppm Offset and 15ppm Total Unadjusted Error
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
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
The LTC
2482 combines a 16-bit plus sign No Latency
ΔΣ
analog-to-digital converter with patented Easy Drive
technology. The patented sampling scheme eliminates
dynamic input current errors and the shortcomings of on-
chip buffering through automatic cancellation of differential
input current. This allows large external source impedances
and input signals with rail-to-rail input range to be directly
digitized while maintaining exceptional DC accuracy.
The LTC2482 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 noise level is 600nV RMS independent of
VREF. This allows direct digitization of low level signals
with 16-bit accuracy. The LTC2482 includes an on-chip
trimmed oscillator, eliminating the need for external crystals
or oscillators and provides 87dB rejection of 50Hz and
60Hz line frequency noise. Absolute accuracy and low
drift are automatically maintained through continuous,
transparent, offset and full-scale calibration.
RSOURCE (Ω)
1
+FS
ERROR
(ppm)
–20
0
20
1k
100k
2482 TA02
–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 = 1μF
LTC2482
VREF
VCC
GND
fO
1μF
SDO
3-WIRE
SPI INTERFACE
0.1μF
10k
IDIFF = 0
10k
SCK
2482 TA01
CS
SENSE
VIN
+
VIN
–
0.1μF
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. No Latency
ΔΣ and Easy Drive are trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
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