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LTC2498IUHF#PBF

更新时间： 2024-02-20 02:40:23
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
36页 469K
描述
LTC2498 - 24-Bit 8-/16-Channel Delta Sigma ADC with Easy Drive Input Current Cancellation; Package: QFN; Pins: 38; Temperature Range: -40°C to 85°C

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LTC2498IUHF#PBF 技术参数

是否Rohs认证：不符合生命周期：Obsolete
包装说明：QCCN, LCC38,.2X.28,20Reach Compliance Code：compliant
风险等级：5.92Is Samacsys：N
转换器类型：A/D CONVERTERJESD-30 代码：R-PQCC-N38
位数：24功能数量：1
端子数量：38最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：QCCN封装等效代码：LCC38,.2X.28,20
封装形状：RECTANGULAR封装形式：CHIP CARRIER
电源：3/5 V认证状态：Not Qualified
子类别：Analog to Digital Converters表面贴装：YES
技术：CMOS温度等级：INDUSTRIAL
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUADBase Number Matches：1

LTC2498IUHF#PBF 数据手册

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LTC2498  
24-Bit 8-/16-Channel ΔΣ  
ADC with Easy Drive Input  
Current Cancellation  
DESCRIPTION  
FEATURES  
n
Up to 8 Differential or 16 Single-Ended Inputs  
The LTC®2498 is a 16-channel (8-differential) 24-bit No  
Latency ΔΣ™ 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.  
n
Easy Drive™ Technology Enables Rail-to-Rail  
Inputs with Zero Differential Input Current  
n
Directly Digitizes High Impedance Sensors with  
Full Accuracy  
600nV RMS Noise  
n
n
Integrated High Accuracy Temperature Sensor  
n
GND to V Input/Reference Common Mode Range  
CC  
n
Programmable 50Hz, 60Hz or Simultaneous  
TheLTC2498includesahighaccuracytemperaturesensor  
and an integrated oscillator. This device can be configured  
to measure an external signal (from combinations of 16  
analog input channels operating in single ended or dif-  
ferential modes) or its internal temperature sensor. The  
integrated temperature sensor offers 1/30th °C resolution  
and 2°C absolute accuracy.  
50Hz/60Hz Rejection Mode  
2ppm INL, No Missing Codes  
n
n
n
n
1ppm Offset and 15ppm Full-Scale Error  
2x Speed Mode (15Hz Using Internal Oscillator)  
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  
n
n
n
The LTC2498 allows a wide common mode input range  
(0V to V ), independent of the reference voltage. Any  
Tiny QFN 5mm × 7mm Package  
CC  
combination of single-ended or differential inputs can be  
selected and the first conversion after a new channel is  
selected is valid. Access to the multiplexer output enables  
optionalexternalamplifierstobesharedbetweenallanalog  
inputs and auto calibration continuously removes their  
associated offset and drift.  
APPLICATIONS  
n
Direct Sensor Digitizer  
n
Direct Temperature Measurement  
Instrumentation  
n
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Δ∑ is a  
trademark of Linear Technology Corporation. All other trademarks are the property of their  
respective owners.  
n
Industrial Process Control  
TYPICAL APPLICATION  
Data Acquisition System with Temperature Compensation  
Absolute Temperature Error  
5
4
2.7V TO 5.5V  
0.1μF  
10μF  
3
2
MUXOUT/  
ADCIN  
V
CH0  
CH1  
CC  
•
•
•
1
+
REF  
+
CH7  
CH8  
SDI  
SCK  
SDO  
CS  
0
IN  
16-CHANNEL  
MUX  
24-BIT ΔΣ ADC  
WITH EASY-DRIVE  
4-WIRE  
SPI INTERFACE  
–1  
–2  
–3  
–4  
–5  
•
•
•
–
IN  
CH15  
COM  
–
REF  
F
O
TEMPERATURE  
SENSOR  
MUXOUT/  
ADCIN  
OSC  
–55 –30 –5  
20  
45  
70  
95 120  
TEMPERATURE (°C)  
2498 TA01a  
2498 TA01b  
2498fc  
1
1234567...36

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