參數(shù)資料
型號: DC571A
廠商: Linear Technology
文件頁數(shù): 1/48頁
文件大?。?/td> 0K
描述: BOARD DELTA SIGMA ADC LTC2418
軟件下載: QuikEval System
設(shè)計資源: DC571A Design File
DC571A Schematic
標(biāo)準(zhǔn)包裝: 1
系列: QuikEval™
ADC 的數(shù)量: 1
位數(shù): 24
采樣率(每秒): 7.5
數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
工作溫度: 0°C ~ 70°C
已用 IC / 零件: LTC2418
已供物品:
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LTC2414/LTC2418
1
241418fa
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
The LTC
2414/LTC2418 are 8-/16-channel (4-/8-differ-
ential) micropower 24-bit
Σ analog-to-digital convert-
ers. They operate from 2.7V to 5.5V and include an
integrated oscillator, 2ppm INL and 0.2ppm RMS noise.
They use delta-sigma technology and provide single cycle
settling time for multiplexed applications. Through a
single pin, the LTC2414/LTC2418 can be configured for
better than 110dB differential mode rejection at 50Hz or
60Hz
±2%, or they can be driven by an external oscillator
for a user-defined rejection frequency. The internal oscil-
lator requires no external frequency setting components.
The LTC2414/LTC2418 accept any external differential
reference voltage from 0.1V to VCC for flexible ratiometric
and remote sensing measurement applications. They can
be configured to take 4/8 differential channels or
8/16 single-ended channels. The full-scale bipolar input
range is from – 0.5VREF to 0.5VREF. The reference common
mode voltage, VREFCM, and the input common mode volt-
age, VINCM, may be independently set within GND to VCC.
The DC common mode input rejection is better than 140dB.
The LTC2414/LTC2418 communicate through a flexible
4-wire digital interface that is compatible with SPI and
MICROWIRE
TM protocols.
Direct Sensor Digitizer
Weight Scales
Direct Temperature Measurement
Gas Analyzers
Strain Gauge Transducers
Instrumentation
Data Acquisition
Industrial Process Control
, LTC and LT are registered trademarks of Linear Technology Corporation.
8-/16-Channel Single-Ended or 4-/8-Channel
Differential Inputs (LTC2414/LTC2418)
Low Supply Current (200
A, 4A in Autosleep)
Differential Input and Differential Reference
with GND to VCC Common Mode Range
2ppm INL, No Missing Codes
2.5ppm Full-Scale Error and 0.5ppm Offset
0.2ppm Noise
No Latency: Digital Filter Settles in a Single Cycle
Each Conversion Is Accurate, Even After a New
Channel is Selected
Single Supply 2.7V to 5.5V Operation
Internal Oscillator—No External Components
Required
110dB Min, 50Hz/60Hz Notch Filter
8-/16-Channel
24-Bit No Latency
ΣTM ADCs
No Latency
Σ is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Total Unadjusted Error
vs Input Voltage
SDI
SCK
SDO
CS
FO
REF+
VCC
9
11
2.7V TO 5.5V
20
18
17
16
19
1
F
COM
REF
GND
10
THERMOCOUPLE
12
15
DIFFERENTIAL
24-BIT
Σ ADC
16-CHANNEL
MUX
+
241418 TA01a
4-WIRE
SPI INTERFACE
LTC2418
= 50Hz REJECTION
= EXTERNAL OSCILLATOR
= 60Hz REJECTION
VCC
CH0
CH1
21
22
CH7
CH8
28
1
CH15
8
INPUT VOLTAGE (V)
–2.5 –2
–1
0
1.0
2.0
TUE
(ppm
OF
V
REF
)
3
2
1
0
–1
–2
–3
–1.5
–0.5
0.5
1.5
2414/18 TA01b
2.5
VCC = 5V
VREF = 5V
VINCM = VREFCM = 2.5V
FO = GND
TA = 85°C
TA = 25°C
TA = –45°C
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