参数资料
| 型号： | ADR293ERZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 5V 8-SOIC |
| 标准包装： | 2,500 |
| 系列： | XFET® |
| 基准类型： | 串联，精度 |
| 输出电压： | 5V |
| 容差： | ±0.06% |
| 温度系数： | 10ppm/°C |
| 输入电压： | 6 V ~ 15 V |
| 通道数： | 1 |
| 电流 - 静态： | 15µA |
| 电流 - 输出： | 5mA |
| 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： | 带卷 (TR) |
ADR293
APPLICATIONS
KELVIN CONNECTIONS
In many portable instrumentation applications where PC board
cost and area go hand-in-hand, circuit interconnects are very often
of dimensionally minimum width. 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
can exhibit a typical line resistance of 0.45 mΩ/square (1 oz. Cu,
for example). Force and sense connections, also referred to as
Kelvin connections, offer a convenient method of eliminating
the effects of voltage drops in circuit wires. Load currents flowing
through wiring resistance produce an error (V ERROR = R × I L ) at
the load. However, the Kelvin connection in Figure 23 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 compensate for the
VOLTAGE REGULATOR FOR PORTABLE
EQUIPMENT
The ADR293 is ideal for providing a stable, low cost, and low
power reference voltage in portable equipment power supplies.
regulator that not only has low output noise (as compared to
switch mode design) and low power, but also a very fast
recovery after current surges. Some precautions should be taken
in the selection of the output capacitors. Too high an ESR
(effective series resistance) could endanger the stability of the
circuit. A solid tantalum capacitor, 16 V or higher, and an
aluminum electrolytic capacitor, 10 V or higher, are recom-
mended for C1 and C2, respectively. In addition, the path from
the ground side of C1 and C2 to the ground side of R1 should
be kept as short as possible.
V IN R LW
SENSE
V IN
ADR293
+V OUT
FORCE
wiring error and to produce the correct voltage at the load.
+V OUT
2
R LW
A1
V OUT 6
R L
1μF 100k ?
CHARGER
INPUT
6V
LEAD-ACID
BATTERY
0.1μF
2
V IN
ADR293
V OUT 6
+
GND
2
3
7
OP20
4
6
R3
510k ?
IRF9530
GND
4
4
5V, 100mA
Figure 23. Advantage of Kelvin Connection
R1
402k ?
1%
R2
402k ?
1%
C1
68μF
TANT
+
+ C2
1000μF
ELECT
Figure 24. Voltage Regulator for Portable Equipment
Rev. D | Page 11 of 12
相关PDF资料 |
PDF描述 |
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| ADR318ARJ-R2 | IC VREF SERIES PREC 1.8V SOT23-5 |
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| ADR390BUJZ-REEL7 | IC VREF SERIES PREC TSOT-23-5 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADR293FR | 制造商:Analog Devices 功能描述:V-Ref Precision 5V 5mA 8-Pin SOIC N Tube 制造商:Rochester Electronics LLC 功能描述:LOW NOISE, MICROPWR PRECISION VOLT. REF. - Bulk |
| ADR293FR-REEL | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Noise Micropower Precision Voltage Reference |
| ADR293FR-REEL7 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Noise Micropower Precision Voltage Reference |
| ADR293FRZ | 制造商:Analog Devices 功能描述:V-Ref Precision 5V 5mA 8-Pin SOIC N Tube 制造商:Rochester Electronics LLC 功能描述:LOW NOISE, MICROPWR PRECISION VOLT. REF. - Bulk |
| ADR293GBC | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Noise Micropower Precision Voltage Reference |
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