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參數(shù)資料
| 型號： | LTC2420 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Micropower 20-bit ADC(微功耗，20位串行模數(shù)轉換器) |
| 中文描述： | 微功耗20位ADC（微功耗，20位串行模數(shù)轉換器） |
| 文件頁數(shù)： | 36/36頁 |
| 文件大小： | 388K |
| 代理商： | LTC2420 |
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LTC2420
RELATED PARTS
PART NUMBER
LT1019
LT1025
LTC1043
DESCRIPTION
Precision Bandgap Voltage Reference, 2.5V, 5V
Micropower Thermocouple Cold Junction Compensator
Dual Precision Instrumentation Switched Capacitor
Building Block
Precision Chopper Stabilized Op Amp
Precision Bandgap Voltage Reference, 5V
8-Channel Multiplexer
Micropower Series Voltage Reference
24-Bit
μ
Power, No Latency
Σ
ADC in SO-8
1-/2-Channel, 24-Bit No Latency
Σ
ADCs
4-/8-Channel, 24-Bit No Latency
Σ
ADC
24-Bit No Latency
Σ
ADC with Differential Inputs
24-Bit No Latency
Σ
ADC with Differential Inputs/Reference
24-Bit No Latency
Σ
ADC
4-/8-Channel 20-Bit No Latency
Σ
ADCs
COMMENTS
3ppm/
°
C Drift, 0.05% Max
0.5
°
C Initial Accuracy, 80
μ
A Supply Current
Precise Charge, Balanced Switching, Low Power
LTC1050
LT1236A-5
LTC1391
LT1460
LTC2400
LTC2401/LTC2402
LTC2404/LTC2408
LTC2410
LTC2411
LTC2413
LTC2424/LTC2428
No External Components 5
μ
V Offset, 1.6
μ
V
P-P
Noise
0.05% Max, 5ppm/
°
C Drift
Low R
ON
: 45
, Low Charge Injection, Serial Interface
0.075% Max, 10ppm/
°
C Max Drift, 2.5V, 5V and 10V Versions
4ppm INL, 10ppm TUE, 200
μ
A, Pin Compatible with LTC2420
24 Bits in MSOP Package
4ppm INL, 10ppm TUE, 200
μ
A
800nV Noise, Differential Reference, 2.7V to 5.5V Operation
1.6
μ
V Noise, Fully Differential, 10-Lead MSOP Package
Simultaneous 50Hz to 60Hz Rejection 0.16ppm Noise
8ppm INL, 1.2ppm Noise, Fast Mode
2420f LT/LCG 1000 4K PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2000
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
G
FAX: (408) 434-0507
G
www.linear-tech.com
TYPICAL APPLICATIO
The circuit shown in Figure 41 enables pseudodifferential
measurements of several bridge transducers and abso-
lute temperature measurement. The LTC1391 is an
8-to-1 analog multiplexer.
Consecutive readings are performed on each side of the
bridge by selecting the appropriate channel on the
LTC1391. Each output is digitized and the results digitally
subtracted to obtain the pseudodifferential result. Several
bridge transducers may be digitized in this manner.
U
In order to measure absolute temperature with a thermo-
couple, cold junction compensation must be performed.
Channel 6 measures the output of the thermocouple while
channel 7 measures the output of the cold junction sensor
(diode, thermistor, etc.). This enables digital cold junc-
tion compensation of the thermocouple output. The tem-
perature measurement may then be used to compensate
the temperature effects of the bridge transducers.
CH1
LTC1391
CH2
CH0
THERMOCOUPLE
THERMISTOR
CH3
OUT
GND
LTC2420
V
IN
2420 F41
V
REF
GND
V
CC
V
CC
F
O
SCK
SDO
CS
CH4
CH5
CH6
CH7
Figure 41. Pseudodifferential Multichannel Bridge Digitizer
and Digital Cold Junction Compensation
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相關代理商/技術參數(shù) |
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| LTC2420CS8 | 功能描述:IC ADC 20BIT MICRPWR W/OSC 8SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| LTC2420CS8#PBF | 功能描述:IC ADC 20BIT MICRPWR W/OSC 8SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應商設備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| LTC2420CS8#PBF | 制造商:Linear Technology 功能描述:A/D Converter (A-D) IC |
| LTC2420CS8#TR | 功能描述:IC A/D CONV 20BIT MICRPWR 8-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| LTC2420CS8#TRPBF | 功能描述:IC ADC 20BIT MICRPWR W/OSC 8SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
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