参数资料
| 型号： | AD524AE |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/28页 |
| 文件大小： | 0K |
| 描述： | IC AMP INST 1MHZ PREC LN 20CLCC |
| 产品变化通告： | Product Discontinuance 27/Oct/2011 |
| 标准包装： | 1 |
| 放大器类型： | 仪表 |
| 电路数： | 1 |
| 转换速率： | 5 V/µs |
| 增益带宽积： | 1MHz |
| -3db带宽： | 1MHz |
| 电流 - 输入偏压： | 50nA |
| 电压 - 输入偏移： | 250µV |
| 电流 - 电源： | 3.5mA |
| 电压 - 电源，单路/双路(±)： | ±6 V ~ 18 V |
| 工作温度： | -25°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-CLCC |
| 供应商设备封装： | 20-LCCC |
| 包装： | 管件 |
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AD524
Rev. F | Page 23 of 28
Figure 53 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
semiconductor temperature sensor.
AD524
IRON
CONSTANTAN
AD590
CU
52.3
8.66k
1k
EO
2.5V
AD580
7.5V
G = 100
– 2.5V
1 +
52.3
R
TYPE
J
K
E
T
S, R
RA
NOMINAL
VALUE
REFERENCE
JUNCTION
+15°C < TA < +35°C
52.3
41.2
61.4
40.2
5.76
+VS
IA
TA
VA
+VS
+
–
–VS
OUTPUT
AMPLIFIER
OR METER
RT
NOMINAL VALUE
9135
RA
EO = VT – VA +
52.3IA + 2.5V
MEASURING
JUNCTION
= VT
~
VT
0
0500-
053
Figure 53. Cold-Junction Compensation
The circuit is calibrated by adjusting RT for proper output
voltage with the measuring junction at a known reference
temperature and the circuit near 25°C. If resistors with low
temperature coefficients are used, compensation accuracy is
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 Table 5. For other ranges
of ambient temperature, the equation in Figure 53 may be
solved for the optimum values of RT and RA.
The microprocessor controlled data acquisition system shown
in Figure 54 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.
Because its output has an inverted scale, the autogain cycle
converts the A/D reference and compares it with full scale. A
multiplicative correction factor is then computed and applied
to subsequent readings.
For a comprehensive study of instrumentation amplifier
design and applications, refer to the Designer’s Guide to
Instrumentation Amplifiers (3rd Edition), available free from
Analog Devices, Inc.
AD524
AD7524
AD574A
AD583
AGND
20k
10k
5k
AD7507
CONTROL
DECODE
LATCH
ADDRESS BUS
A0, A2,
EN, A1
VIN
VREF
MICRO-
PROCESSOR
+
–
RG2
RG1
–VREF
20k
1/2
AD712
1/2
AD712
–
+
–
+
2
10
6
9
16
13
12
11
3
1
0
0500
-0
54
Figure 54. Microprocessor Controlled Data Acquisition System
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD524AEZ | 制造商:Analog Devices 功能描述:SP Amp INSTR Amp Single ±18V 20-Pin LCC Tube |
| AD524AR | 制造商:Analog Devices 功能描述: |
| AD524AR16 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Amplifier. Other |
| AD524AR-16 | 功能描述:IC AMP INST 1MHZ PREC LN 16SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:带卷 (TR) |
| AD524AR-16-REEL | 功能描述:IC AMP INST 1MHZ PREC LN 16SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:带卷 (TR) |
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