參數(shù)資料
型號： DC846A
廠商： Linear Technology
文件頁數(shù)： 1/28頁
文件大小： 0K
描述： BOARD DELTA SIGMA ADC LTC2447
軟件下載： QuikEval System
設計資源： DC846A Design File
DC846A Schematic
標準包裝： 1
系列： QuikEval™
ADC 的數(shù)量： 1
位數(shù)： 24
采樣率（每秒）： 8k
數(shù)據(jù)接口： MICROWIRE?，串行，SPI?
已用 IC / 零件： LTC2447
已供物品： 板
相關產(chǎn)品： LTC2447IUHF#PBF-ND - IC ADC 24BIT 8CH HI SPEED 38QFN
LTC2447CUHF#PBF-ND - IC ADC 24BIT 8CH HI SPEED 38QFN
LTC2447IUHF#TRPBF-ND - IC ADC 24BIT 8CH HI SPEED 38QFN
LTC2447CUHF#TRPBF-ND - IC ADC 24BIT 8CH HI SPEED 38QFN
LTC2446/LTC2447
1
24467fa
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
■ Flow
■ Weight Scales
■
Pressure
■ Direct Temperature Measurement
■ Gas Chromatography
■ Five Selectable Differential Reference Inputs
■ Four Differential/Eight Single-Ended Inputs
■ 4-Way MUX for Multiple Ratiometric
Measurements
■ Up to 8kHz Output Rate
■ Up to 4kHz Multiplexing Rate
■ Selectable Speed/Resolution:
2
VRMS Noise at 1.76kHz Output Rate
200nVRMS Noise at 13.8Hz Output Rate with
Simultaneous 50/60Hz Rejection
■ Guaranteed Modulator Stability and Lock-Up
Immunity for any Input and Reference Conditions
■ 0.0005% INL, No Missing Codes
■ Autosleep Enables 20
A Operation at 6.9Hz
■ <5
V Offset (4.5V < VCC < 5.5V, –40°C to 85°C)
■ Differential Input and Differential Reference with
GND to VCC Common Mode Range
■ No Latency Mode, Each Conversion is Accurate Even
After a New Channel is Selected
■ Internal Oscillator—No External Components
■ LTC2447 Includes MUXOUT/ADCIN for External
Buffering or Gain
■ Tiny QFN 5mm x 7mm Package
24-Bit High Speed
8-Channel
Σ ADCs with
Selectable Multiple Reference Inputs
The LTC
2446/LTC2447 4-terminal switching enables
multiplexed ratiometric measurements. Four sets of se-
lectable differential inputs coupled with four sets of differ-
ential reference inputs allow multiple RTDs, bridges and
other sensors to be digitized by a single converter. A fifth
differential reference input can be selected for any input
channel not requiring ratiometric measurements (ther-
mocouples, voltages, current sense, etc.). The flexible
input multiplexer allows single-ended or differential in-
puts coupled with a slaved reference input or a universal
reference input.
A proprietary delta-sigma architecture results in absolute
accuracy (offset, full-scale, linearity) of 15ppm, noise as
low as 200nVRMS and speeds as high as 8kHz. Through a
simple 4-wire interface, ten speed/resolution combina-
tions can be selected. The first conversion following a
speed, resolution, channel change or reference change is
valid since there is no settling time between conversions,
enabling scan rates of up to 4kHz. Additionally, a 2x mode
can be selected for any speed-enabling output rates up to
8kHz with one cycle of latency.
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTC2446 Speed vs RMS Noise
Multiple Ratiometric Measurement System
CONVERSION RATE (Hz)
1
0.1
RMS
NOISE
(
V)
1
10
100
10
100
24467 TA02
1000
10000
2.8
V AT 880Hz
280nV AT 6.9Hz
(50/60Hz REJECTION)
VCC = 5V
VREF = 5V
VIN
+ = V
IN
– = 0V
2x SPEED MODE
NO LATENCY MODE
VARIABLE SPEED/
RESOLUTION 24-BIT
Σ ADC
+
–
19-INPUT
4-OUTPUT
MUX
REF+
VCC
LTC2446
IN+
IN–
REF–
CS
SDI
SDO
SCK
24467 TA01
Protected by U.S. Patents, including 6140950, 6169506, 6208279, 6411242, 6639526
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相關代理商/技術參數(shù)
參數(shù)描述
DC847A 功能描述:BOARD DELTA SIGMA ADC LTC2446 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉換器 (ADC) 系列:QuikEval™ 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標準）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件
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