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参数资料
| 型号： | REF02J/883 |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, MBCY8 |
| 封装： | MO-002AK, TO-99, METAL, CAN-8 |
| 文件页数： | 3/16页 |
| 文件大小： | 327K |
| 代理商： | REF02J/883 |
REF02
Rev. F | Page 11 of 16
00375-F
-018
TEMP
TRIM
GND
U1
OP1177
V+
V–
15V
U2
VO
VOUT
VIN
VTEMP
1.9mV/
°C
VIN
REF02
Figure 19. Temperature Monitoring
00375-F
-019
GND
REF02
4
6
2
TEMP
3
CMP02
2
3
8
4
R6
1
7
R7
27k
R1
(9.2k
)
R3
(1.3k
)
R2
1.5k
R4
2.7k
R5
2.2k
V+
V–
–
+
HEATING
ELEMENT
V+ (12V TO 32V)
VIN
VO
(SEE NOTE 1)
NOTES
1. REF02 SHOULD BE THERMALLY CONNECTED
TO SUBSTANCE BEING HEATED.
2. NUMBERS IN PARENTHESES ARE FOR A
SETPOINT TEMPERATURE OF 60
°C.
3. R3 = R1 || R2 || R6
Figure 20. Temperature Controller
REFERENCE STACK WITH EXCELLENT LINE
REGULATION
00375-F
-020
GND
REF02
GND
REF02
GND
REF02
TRIM
10k
10k
RB
6.8k
10k
2
6
5
4
2
6
5
4
2
6
5
4
15V
10V
5V
TRIM
27V TO 55V
VIN
VO
VIN
VO
VIN
VO
Figure 21. Reference Stack
PRECISION CURRENT SOURCE
A current source with 35 V output compliance and excellent
output impedance can be obtained using this circuit. REF02
keeps the line voltage and power dissipation constant in device;
the only important error consideration at room temperature is
the negative supply rejection of the op amp. The typical 3 V/V
PSRR of the OP02E will create a 20 ppm change (3 V/V ×
35 V/5 V) in output current over a 25 V range. For example, a
5 mA current source can be built (R = 1 k) with 350 M
output impedance.
Two REF01s and one REF02 can be stacked to yield 5.000 V,
15.000 V, and 25.000 V outputs. An additional advantage is
near-perfect line regulation of the 5.0 V and 15.0 V output. A 27
V to 55 V input change produces an output change that is less
than the noise voltage of the devices. A load bypass resistor
(RB) provides a path for the supply current (ISY) of the 15.000 V
regulator.
00375-F
-021
GND
REF02
GND
REF02
OP02E
C
R
2
6
7
3
4
6
4
+50V
–5V
IO =
5V
R
RO =
35V
20
×10–6 × 5mA
R
(TRIM FOR
CALIBRATION)
VIN
VO
VIN
VO
VO = 0V
TO 25V
1
2
In general, any number of REF01s and REF02s can be stacked
this way. For example, 10 devices will yield 10 outputs in 5 V or
10 V steps. The line voltage can change from 100 V to 130 V.
However, care must be taken to ensure that the total load
currents do not exceed the maximum usable current (typically
21 mA).
Figure 22. Precision Current Source
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相关代理商/技术参数 |
参数描述 |
|---|---|
| REF02J-G107 | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
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| REF02Q | 制造商:Analog Devices 功能描述: |
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