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参数资料
| 型号： | REF02RC/883C |
| 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, CQCC20 |
| 封装： | CERAMIC, LCC-20 |
| 文件页数： | 9/20页 |
| 文件大小： | 593K |
| 代理商： | REF02RC/883C |
REF01/REF02/REF03
Rev. J | Page 17 of 20
PRECISION BOOSTED OUTPUT REGULATOR
The output current sourcing capability of the REF0x series can
be boosted by using an external op amp and MOSFET, as shown
in Figure 42.
U2
15V
N1
200
U1
REF01/
REF02/
REF03
VIN
VOUT
TEMP TRIM
GND
V–
V+
OP1177
2N7002
VIN
VO
RL
1F
CL
00
37
5-
04
2
C1
1000pF
00
37
5-
0
43
R2
100
R1
100
Figure 42. Precision Boosted Output Regulator
In this circuit, U2 forces VO to VREF by regulating the current
through N1, thereby sourcing the load current directly from the
input voltage source connected at VIN. Using the components
shown, this circuit can source up to 50 mA with an input volt-
age of 15.0 V. The circuit’s current sourcing capability can be
further increased by replacing N1 with a higher-power MOSFET.
BIPOLAR VOLTAGE REFERENCE
Many applications require both a positive and reference voltage
of the same magnitude. A simple method of generating such a
bipolar reference is shown in Figure 43.
REF03
VIN
GND
V+
V–
3
4
2
6
7
2
U1
U2
4
6
VOUT
OP97
100k
–2.5V
+2.5V
100k
Figure 43. Bipolar Voltage Reference
In this configuration, the negative rail is generated simply
with an inverting amplifier with a gain of 1. A low offset
op amp should be used to minimize the voltage error at the
negative output.
ADJUSTABLE REFERENCE WITH POSITIVE AND
NEGATIVE SWING
The output voltage of the REF0x references can be readily
adjusted via a simple trim circuit (explained in the Output
Adjustment section). The circuit shown in Figure 44 extends
the negative range of adjustment beyond that obtainable with
the simple trim circuit by employing a precision op amp with
a potentiometer feeding the op amp’s noninverting input.
00
37
5-
04
4
REF03
VIN
GND
V+
2
3
4
6
7
+15V
50k
2
U1
U2
4
6
VOUT
OP97
50k
50k
VOUT
–2.5V TO +2.5V
Figure 44. Negatively Adjustable Reference
The voltage output from the op amp can be adjusted by
changing the value of the potentiometer: as shown, the op
amp outputs +2.5 V when the pot is pulled completely high,
and 2.5V when pulled completely low. In this configuration,
the load current is sourced by the op amp; therefore, a low
offset op amp with a current rating that meets or exceeds the
current requirements of the load should be used.
相关PDF资料 |
PDF描述 |
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| REF01AJ/883C | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 10 V, MBCY8 |
| REF02Z883B | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, CDIP8 |
| REF02BIDP | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, PDIP8 |
| REF02BICZ | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, CDIP8 |
| REF43BIGJ | THREE TERM VOLTAGE REFERENCE, MBCY8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| REF02RE/883 | 制造商:AD 制造商全称:Analog Devices 功能描述:+5V Precision Voltage Reference/Temperature Trangsducer |
| REF02S | 制造商:BB 制造商全称:BB 功能描述:+5V Precision VOLTAGE REFERENCE |
| REF02Z | 功能描述:IC VREF SERIES PREC 5V 8-CERDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:2,000 系列:- 基准类型:旁路，可调节，精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3（TO-226AA）成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR) |
| REF02Z/883 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference |
| REF-02Z/883 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference |
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