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參數(shù)資料
| 型號(hào)： | AD524SD |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 16/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP INST 1MHZ PREC LN 16CDIP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 放大器類型： | 儀表 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 5 V/µs |
| 增益帶寬積： | 1MHz |
| -3db帶寬： | 1MHz |
| 電流 - 輸入偏壓： | 50nA |
| 電壓 - 輸入偏移： | 100µV |
| 電流 - 電源： | 3.5mA |
| 電壓 - 電源，單路/雙路(±)： | ±6 V ~ 18 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 16-CDIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 16-CDIP 側(cè)面銅焊 |
| 包裝： | 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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD524SD/883B | 功能描述:儀表放大器 PRECISION LOW NOISE IN AM RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| AD524SD-AIRBUS | 制造商:Analog Devices 功能描述: |
| AD524SE | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision Instrumentation Amplifier |
| AD524SE/883B | 功能描述:儀表放大器 PRECISION LOW NOISE IN AM RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
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