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| 型号： | ADR425BR |
| 厂商： | Analog Devices Inc |
| 文件页数： | 19/24页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 5V 8-SOIC |
| 产品变化通告： | Product Discontinuance 27/Oct/2011 |
| 设计资源： | Versatile High Precision Programmable Current Sources Using DACs, Op Amps, and MOSFET Transistors (CN0151) |
| 标准包装： | 1 |
| 系列： | XFET® |
| 基准类型： | 串联，精度 |
| 输出电压： | 5V |
| 容差： | ±0.04% |
| 温度系数： | 3ppm/°C |
| 输入电压： | 7 V ~ 18 V |
| 通道数： | 1 |
| 电流 - 静态： | 500µA |
| 电流 - 输出： | 10mA |
| 工作温度： | -40°C ~ 125°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-SO |
| 包装： | 管件 |
Data Sheet
KELVIN CONNECTIONS
In many portable instrumentation applications where PC board
cost and area are important considerations, circuit intercon-
nects are often narrow. These narrow lines can cause large
voltage drops if the voltage reference is required to provide load
currents to various functions. In fact, a circuit’s interconnects
ADR420/ADR421/ADR423/ADR425
DUAL-POLARITY REFERENCES
Dual-polarity references can easily be made with an op amp and
a pair of resistors. In order not to defeat the accuracy obtained
by the ADR42x, it is imperative to match the resistance toler-
ance and the temperature coefficient of all components.
V IN
can exhibit a typical line resistance of 0.45 m?/square (1 oz. Cu,
for example). Force and sense connections, also referred to as
Kelvin connections, offer a convenient method of eliminating
1μF
0.1μF
2
V IN
U1
V OUT 6
R1
10k ?
R2
10k ?
+5V
the effects of voltage drops in circuit wires. Load currents flow-
ADR425
+10V
ing through wiring resistance produce an error (V ERROR = R × I L )
overcomes the problem by including the wiring resistance
within the forcing loop of the op amp. Because the op amp
senses the load voltage, op amp loop control forces the output to
GND
4
TRIM 5
R3
5k ?
V+
U2
OP1177
V–
–10V
–5V
compensate for the wiring error and to produce the correct
voltage at the load.
V IN
2
Figure 44. +5 V and ?5 V Reference Using ADR425
+2.5V
+10V
ADR420/
ADR421/
ADR423/
ADR425
V OUT 6
R LW
V IN
R LW
A1
V OUT
SENSE
V OUT
FORCE
2
V IN V OUT 6
U1
ADR425
R1
5.6k ?
GND
4
A1 = OP191
R L
GND
4
TRIM 5
R2
5.6k ?
V+
Figure 43. Advantage of Kelvin Connection
–2.5V
U2
OP1177
V–
–10V
Figure 45. +2.5 V and ?2.5 V Reference Using ADR425
Rev. J | Page 19 of 24
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADR425BR-REEL7 | 功能描述:IC VREF SERIES PREC 5V 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 标准包装:3,000 系列:- 基准类型:旁路，精度 输出电压:5V 容差:±0.5% 温度系数:100ppm/°C 输入电压:- 通道数:1 电流 - 阴极:80µA 电流 - 静态:- 电流 - 输出:15mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:TO-236-3，SC-59，SOT-23-3 供应商设备封装:SOT-23-3 包装:带卷 (TR) 其它名称:LM4040CIM3-5.0MLTRLM4040CIM3-5.0MLTR-ND |
| ADR425BRZ | 功能描述:IC VREF SERIES PREC 5V 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 标准包装:3,000 系列:- 基准类型:旁路，精度 输出电压:3V 容差:±0.5% 温度系数:100ppm/°C 输入电压:- 通道数:1 电流 - 阴极:82µA 电流 - 静态:- 电流 - 输出:15mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-TSSOP（5 引线），SC-88A，SOT-353 供应商设备封装:SC-70-5 包装:带卷 (TR) 其它名称:296-20888-2 |
| ADR425BRZ | 制造商:Analog Devices 功能描述:IC V REF SERIES 5V +/-0.002V 8SO |
| ADR425BRZ-REEL7 | 功能描述:IC VREF SERIES PREC 5V 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:XFET® 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) |
| ADR425CR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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