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參數資料
型號: LTC2488IDE#TRPBF
廠商: Linear Technology
文件頁數: 1/30頁
文件大小: 0K
描述: IC ADC 16BIT DELTA SIG 14-DFN
標準包裝: 2,500
位數: 16
采樣率(每秒): 6.9
數據接口: MICROWIRE?,串行,SPI?
轉換器數目: 1
功率耗散(最大): 800µW
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 14-WFDFN 裸露焊盤
供應商設備封裝: 14-DFN-EP(4x3)
包裝: 帶卷 (TR)
輸入數目和類型: 4 個單端,雙極;2 個差分,雙極
配用: DC1009A-B-ND - BOARD DELTA SIGMA ADC LTC2488
LTC2488
1
2488fa
RSOURCE (Ω)
1
+FS
ERROR
(ppm)
–20
0
20
1k
100k
2488 TA01b
–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
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
16-Bit 2-/4-Channel ΔΣ
ADC with Easy Drive Input
Current Cancellation
The LTC2488 is a 4-channel (2-channel differential), 16-
bit, No Latency ΔΣ ADC with 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 rail-to-
rail input signals to be directly digitized while maintaining
exceptional DC accuracy.
The LTC2488 includes an integrated oscillator. This device
can be congured to measure an external signal from
combinations of 4 analog input channels operating in single
ended or differential modes. It automatically rejects line
frequencies of 50Hz and 60Hz simultaneously.
The LTC2488 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 rst conversion after a new channel
selection is valid.
Data Acquisition System
Up to 2 Differential or 4 Single-Ended Inputs
Easy Drive Technology Enables Rail-to-Rail Inputs
with Zero Differential Input Current
Directly Digitizes High Impedance Sensors with
Full Accuracy
600nV RMS Noise (0.02LSB Transition Noise)
GND to VCC Input/Reference Common Mode Range
Simultaneous 50Hz/60Hz Rejection
2ppm INL, No Missing Codes
1ppm Offset and 15ppm Full-Scale Error
No Latency: Digital Filter Settles in a Single Cycle,
Even After a New Channel is Selected
Single Supply 2.7V to 5.5V Operation (0.8mW)
Internal Oscillator
Tiny 4mm × 3mm DFN Package
Direct Sensor Digitizer
Direct Temperature Measurement
Instrumentation
Industrial Process Control
Fullscale Error vs Source Resistance
SDI
SCK
SDO
CS
FO
REF+
VCC
2.7V TO 5.5V
10μF
COM
REF
16-BIT ΔΣ ADC
WITH EASY DRIVE
4-CHANNEL
MUX
IN+
IN
2488 TA01a
4-WIRE
SPI INTERFACE
CH0
CH1
CH3
CH2
0.1μF
OSC
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
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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