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参数资料
| 型号： | LTC2414CGN |
| 厂商： | Linear Technology |
| 文件页数： | 36/48页 |
| 文件大小： | 0K |
| 描述： | IC ADC 8CH 24BIT DIFFINPUT28SSOP |
| 标准包装： | 49 |
| 位数： | 24 |
| 采样率（每秒）： | 7.5 |
| 数据接口： | MICROWIRE?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 1mW |
| 电压电源： | 单电源 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 管件 |
| 输入数目和类型： | 8 个单端，单极；8 个单端，双极；4 个差分，单极；4 个差分，双极 |
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LTC2414/LTC2418
41
241418fa
MULTIPLE CHANNEL USAGE
The LTC2414/LTC2418 have up to sixteen input channels
and this feature provides a very flexible and efficient
solution in applications where more than one variable
need to be measured.
Measurements of a Ladder of Sensors
In industrial process, it is likely that a large group of real
world phenomena need to be monitored where the speed
is not critical. One example is the cracking towers in
petroleum refineries where a group of temperature mea-
surements need to be taken and related. This is done by
passing an excitation current through a ladder of RTDs.
The configuration using a single LTC2418 to monitor up to
eight RTDs in differential mode is shown in Figure 48. A
high accuracy R1 is used to set the excitation current and
the reference voltage. A larger value of 25k is selected to
C1
0.1
F
15V
3
1
2
3
2
1
6
5
4
–
+
REF+
REF–
CH0
CH1
GND
VCC
11
12
21
22
15
2410 F53
9
LTC2414/
LTC2418
LT1236-5
RN1
10k
22
10V
350
BRIDGE
TWO ELEMENTS
VARYING
RN1
10k
Q1
2N3904
1/2
LT1112
C2
0.1
F
15V
–5V
–15V
6
7
5
8
7
+
–
RN1
10k
RN1 IS CADDOCK T914 10K-010-02
Q2, Q3
2N3906
×2
1/2
LT1112
RN1
10k
33
×2
C3
47
F
C1
0.1
F
5V
8
4
20
20
+
Figure 47. Use Resistor Arrays to Provide Precise Matching in Excitation Amplifier
reduce the self-heating effects. R1 can also be broken into
two resistors, one 25k to set the excitation current and the
other a high accuracy 1k resistor to set the reference
voltage, assuming 100
platinum RTDs. This results in a
reduced reference voltage and a reduced common mode
difference between the reference and the input signal,
which improves the conversion linearity and reduces total
error.
Each input should be taken close to the related RTD to
minimize the error caused by parasitic wire resistance.
The interference on a signal transmission line from RTD to
the LTC2418 is rejected due to the excellent common
mode rejection and the digital LPF included in the LTC2418.
It should be noted that the input source resistance of CHO
can have a maximum value of 800
8 = 6.4k, so the
parasitic capacitance and resistance of the connection
wires need to be minimized in order not to degrade the
converter performance.
APPLICATIO S I FOR ATIO
WU
UU
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| LTC2414CGN#PBF | 功能描述:IC ADC 8CH 24BIT DIFFINPUT28SSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
| LTC2414CGN#PBF | 制造商:Linear Technology 功能描述:IC ADC 24BIT SSOP-28 |
| LTC2414CGN#TR | 功能描述:IC ADC 8CH 24BIT DIFFINPUT28SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| LTC2414CGN#TRPBF | 功能描述:IC ADC 8CH 24BIT DIFFINPUT28SSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| LTC2414CGNPBF | 制造商:Linear Technology 功能描述:ADC,LTC2414C 24bit D-S 8 ch SPI SSOP |
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