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| 型号： | MCP1541-I/TO |
| 厂商： | Microchip Technology |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | IC VREF SRS PREC 4.096V TO-92-3 |
| 标准包装： | 1,000 |
| 基准类型： | 串联，精度 |
| 输出电压： | 4.096V |
| 容差： | ±1% |
| 温度系数： | 50ppm/°C |
| 输入电压： | 4.3 V ~ 5.5 V |
| 通道数： | 1 |
| 电流 - 静态： | 100µA |
| 电流 - 输出： | 2mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-226-3、TO-92-3 标准主体 |
| 供应商设备封装： | TO-92-3 |
| 包装： | 散装 |
| 产品目录页面： | 663 (CN2011-ZH PDF) |
| 其它名称： | MCP1541I/TO |
MCP1525/41
4.0
APPLICATIONS INFORMATION
4.1.4
PRINTED CIRCUIT BOARD LAYOUT
CONSIDERATIONS
4.1
4.1.1
Application Tips
BASIC CIRCUIT CONFIGURATION
Mechanical stress due to Printed Circuit Board (PCB)
mounting can cause the output voltage to shift from its
initial value. Devices in the SOT-23-3 package are
The MCP1525 and MCP1541 voltage reference
devices should be applied as shown in Figure 4-1 in all
applications.
V DD
generally more prone to assembly stress than devices
in the TO-92 package. To reduce stress-related output
voltage shifts, mount the reference on low-stress areas
of the PCB (i.e., away from PCB edges, screw holes
and large components).
V REF
C IN
0.1 μF
(optional)
MCP1525
MCP1541
V IN
V SS
V OUT
C L
1 μF to 10 μF
4.1.5 OUTPUT FILTERING
If the noise at the output of these voltage references is
too high for the particular application, it can be easily
filtered with an external RC filter and op amp buffer.
The op amp’s input and output voltage ranges need to
include the reference output voltage.
V DD
FIGURE 4-1: Basic Circuit Configuration.
As shown in Figure 4-1, the input voltage is connected
MCP1525
MCP1541
V IN
R FIL
10 kW
V DD
to the device at the V IN input, with an optional 0.1 μF
ceramic capacitor. This capacitor would be required if
the input voltage has excess noise. A 0.1 μF capacitor
V OUT
V SS
C L
10 μF
C FIL
1 μF
V REF
would reject input voltage noise at approximately
1 to 2 MHz. Noise below this frequency will be amply
rejected by the input voltage rejection of the voltage ref-
MCP6021
erence. Noise at frequencies above 2 MHz will be
FIGURE 4-2:
Output Noise-Reducing
f C = ------------------------------
beyond the bandwidth of the voltage reference and,
consequently, not transmitted from the input pin
through the device to the output.
The load capacitance (C L ) is required in order to
4.1.2 INPUT (BYPASS) CAPACITOR
The MCP1525 and MCP1541 voltage references do
not require an input capacitor across V IN to V SS .
However, for added stability and input voltage transient
noise reduction, a 0.1 μF ceramic capacitor is
recommended, as shown in Figure 4-1. This capacitor
should be close to the device (within 5 mm of the pin).
Filter.
The RC filter values are selected for a desired cutoff
frequency:
EQUATION 4-1:
1
2 π R FIL C FIL
The values that are shown in Figure 4-2 (10 k Ω and
1 μF) will create a first-order, low-pass filter at the
output of the amplifier. The cutoff frequency of this filter
is 15.9 Hz, and the attenuation slope is 20 dB/decade.
The MCP6021 amplifier isolates the loading of this low-
pass filter from the remainder of the application circuit.
4.1.3
LOAD CAPACITOR
This amplifier also provides additional drive, with a
faster response time than the voltage reference.
The output capacitor from V OUT to V SS acts as a
frequency compensation for the references and cannot
be omitted. Use load capacitors between 1 μF and
10 μF to compensate these devices. A 10 μF output
capacitor has slightly better noise, and provides
additional charge for fast load transients, when
compared to a 1 μF output capacitor. This capacitor
should be close to the device (within 5 mm of the pin).
? 2005 Microchip Technology Inc.
DS21653B-page 9
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| MCP1541T-I/TT | 功能描述:基准电压& 基准电流 496V 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 |
| MCP1541T-I/TT | 制造商:Microchip Technology Inc 功能描述:IC SM PRECISION REFERENCE 4.096V |
| MCP1541T-I/TT-CUT TAPE | 制造商:Microchip 功能描述:MCP1541 Series 4.3 to 5.5 V Supply SMT 4.096 V Voltage Reference SOT-23-3 |
| MCP1601 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:500 mA Synchronous BUCK Regulator |
| MCP1601_13 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:500 mA Synchronous BUCK Regulator |
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