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AD524S PDF预览

AD524S

更新时间: 2024-01-10 18:38:11
品牌 Logo 应用领域
亚德诺 - ADI 仪表放大器
页数 文件大小 规格书
16页 395K
描述
Precision Instrumentation Amplifier

AD524S 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:QLCC包装说明:LCC-20
针数:20Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.31.00.01
风险等级:5.67Is Samacsys:N
放大器类型:INSTRUMENTATION AMPLIFIER最大平均偏置电流 (IIB):0.05 µA
标称带宽 (3dB):1 MHz最小共模抑制比:70 dB
最大输入失调电流 (IIO):0.035 µA最大输入失调电压:100 µV
JESD-30 代码:S-CQCC-N20JESD-609代码:e0
长度:8.89 mm负供电电压上限:-18 V
标称负供电电压 (Vsup):-15 V最大非线性:0.01%
功能数量:1端子数量:20
最高工作温度:125 °C最低工作温度:-55 °C
封装主体材料:CERAMIC, METAL-SEALED COFIRED封装代码:QCCN
封装等效代码:LCC20,.35SQ封装形状:SQUARE
封装形式:CHIP CARRIER峰值回流温度(摄氏度):NOT SPECIFIED
电源:+-15 V认证状态:Not Qualified
座面最大高度:2.54 mm标称压摆率:0.1 V/us
子类别:Instrumentation Amplifier最大压摆率:5 mA
供电电压上限:18 V标称供电电压 (Vsup):15 V
表面贴装:YES温度等级:MILITARY
端子面层:Tin/Lead (Sn/Pb)端子形式:NO LEAD
端子节距:1.27 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED最大电压增益:1000
最小电压增益:1标称电压增益:1000
宽度:8.89 mmBase Number Matches:1

AD524S 数据手册

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AD524  
Figure 47 shows a simple application, in which the variation of  
the cold-junction voltage of a Type J thermocouple-iron(+)–  
constantan–is compensated for by a voltage developed in series  
by the temperature-sensitive output current of an AD590 semi-  
conductor temperature sensor.  
and the circuit near 25°C. If resistors with low tempcos are  
used, compensation accuracy will be to within ±0.5°C, for  
temperatures between +15°C and +35°C. Other thermocouple  
types may be accommodated with the standard resistance values  
shown in the table. For other ranges of ambient temperature,  
the equation in the figure may be solved for the optimum values  
of RT and RA.  
R
A
REFERENCE  
JUNCTION  
NOMINAL  
VALUE  
+V  
S
TYPE  
7.5V  
The microprocessor controlled data acquisition system shown in  
Figure 48 includes both autozero and autogain capability. By  
dedicating two of the differential inputs, one to ground and one  
to the A/D reference, the proper program calibration cycles can  
eliminate both initial accuracy errors and accuracy errors over  
temperature. The autozero cycle, in this application, converts a  
number that appears to be ground and then writes that same  
number (8-bit) to the AD7524, which eliminates the zero error  
since its output has an inverted scale. The autogain cycle con-  
verts the A/D reference and compares it with full scale. A multi-  
plicative correction factor is then computed and applied to  
subsequent readings.  
+15؇C < T < +35؇C  
A
J
K
52.3⍀  
41.2⍀  
61.4⍀  
40.2⍀  
5.76⍀  
I
A
2.5V  
T
A
AD580  
E
G = 100  
+V  
V
AD590  
CU  
T
A
S
S, R  
AD524  
R
A
IRON  
E
O
V
52.3⍀  
CONSTANTAN  
T
MEASURING  
JUNCTION  
8.66k⍀  
1k⍀  
52.3I + 2.5V  
–V  
S
A
E
= V – V +  
T A  
– 2.5V  
O
R
T
52.3⍀  
OUTPUT  
AMPLIFIER  
OR METER  
1 +  
R
V
T
NOMINAL VALUE  
9135⍀  
For a comprehensive study of instrumentation amplifier design  
and applications, refer to the Instrumentation Amplifier Applica-  
tion Guide, available free from Analog Devices.  
Figure 47. Cold-Junction Compensation  
The circuit is calibrated by adjusting RT for proper output voltage  
with the measuring junction at a known reference temperature  
V
REF  
AD583  
RG  
RG  
2
AD7507  
V
AD524  
N
I
AD574A  
AGND  
1
–V  
REF  
A0 A2  
EN A1  
20k⍀  
20k⍀  
10k⍀  
5k⍀  
AD7524  
1/2  
AD712  
1/2  
AD712  
DECODE  
LATCH  
CONTROL  
MICRO-  
PROCESSOR  
ADDRESS BUS  
Figure 48. Microprocessor Controlled Data Acquisition System  
REV. E  
–15–  

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