參數(shù)資料
型號(hào)： DC1011A-C
廠商： Linear Technology
文件頁數(shù)： 1/38頁
文件大?。?/td> 0K
描述： BOARD DELTA SIGMA ADC LTC2494
軟件下載： QuikEval System
設(shè)計(jì)資源： DC1011A Schematic
DC1011A Design Files
標(biāo)準(zhǔn)包裝： 1
系列： Easy Drive™, QuikEval™
ADC 的數(shù)量： 1
位數(shù)： 16
采樣率（每秒）： 15
數(shù)據(jù)接口： MICROWIRE?，串行，SPI?
已用 IC / 零件： LTC2494
已供物品： 板
相關(guān)產(chǎn)品： LTC2494IUHF#TRPBF-ND - IC ADC 16BIT W/PGA 38-QFN
LTC2494CUHF#TRPBF-ND - IC ADC 16BIT W/PGA 38-QFN
LTC2494CUHF#PBF-ND - IC ADC 16BIT W/PGA 38-QFN
LTC2494IUHF#PBF-ND - IC ADC 16BIT W/PGA 38-QFN
LTC2494
2494fd
Features
applications
Description
16-Bit 8-/16-Channel
DS ADC
with PGA and Easy Drive
Input Current Cancellation
The LTC2494 is a 16-channel (8-differential), 16-bit, No
Latency
DS ADC with Easy Drive technology. The pat-
ented 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 rail-to-rail
input signals to be directly digitized while maintaining
exceptional DC accuracy.
The LTC2494 includes programmable gain, a high accu-
racy temperature sensor and an integrated oscillator. This
device can be configured to measure an external signal
(from combinations of 16 analog input channels operat-
ing in single-ended or differential modes) or its internal
temperature sensor. The integrated temperature sensor
offers 1/2°C resolution and 2°C absolute accuracy. The
LTC2494 can be configured to provide a programmable
gain from 1 to 256 in 8 steps.
The LTC2494 allows a wide common mode input range
(0V to VCC), independent of the reference voltage. Any
combination of single-ended or differential inputs can be
selected and the first conversion, after a new channel is
selected, is valid.
Data Acquisition System with Temperature Compensation
n
Up to 8 Differential or 16 Single-Ended Inputs
n
Easy DriveTM Technology Enables Rail-to-Rail
Inputs with Zero Differential Input Current
n
Directly Digitizes High Impedance Sensors with
Full Accuracy
n
600nV RMS Noise
n
Programmable Gain from 1 to 256
n
Integrated High Accuracy Temperature Sensor
n
GND to VCC Input/Reference Common Mode Range
n
Programmable 50Hz, 60Hz or Simultaneous
50Hz/60Hz Rejection Mode
n
2ppm INL, No Missing Codes
n
1ppm Offset and 15ppm Full-Scale Error
n
2x Speed Mode/Reduced Power Mode (15Hz Using
Internal Oscillator and 80A at 7.5Hz Output)
n
No Latency: Digital Filter Settles in a Single Cycle,
Even After a New Channel Is Selected
n
Single-Supply 2.7V to 5.5V Operation
n
Internal Oscillator
n
Tiny 5mm × 7mm QFN Package
n
Direct Sensor Digitizer
n
Direct Temperature Measurement
n
Instrumentation
n
Industrial Process Control
Absolute Temperature Error
SDI
SCK
SDO
CS
fO
REF+
VCC
MUXOUT/
ADCIN
MUXOUT/
ADCIN
2.7V TO 5.5V
0.1F
COM
REF–
16-BIT
ADC
WITH EASY-DRIVE
16-CHANNEL
MUX
TEMPERATURE
SENSOR
IN+
IN–
2494 TA01a
4-WIRE
SPI INTERFACE
CH0
CH1
CH7
CH8
CH15
10F
OSC
TEMPERATURE (°C)
–55 –30
–5
ABSOLUTE
ERROR
(°C)
5
4
3
2
1
–4
–3
–2
–1
0
120
95
70
45
20
2494 TA01b
–5
typical application
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
No Latency ∑ and Easy Drive are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
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