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| 型号： | MCP1525T-I/TT |
| 厂商： | Microchip Technology |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 2.5V SOT23-3 |
| 标准包装： | 1 |
| 基准类型： | 串联，精度 |
| 输出电压： | 2.5V |
| 容差： | ±1% |
| 温度系数： | 50ppm/°C |
| 输入电压： | 2.7 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： | 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： | 标准包装 |
| 产品目录页面： | 663 (CN2011-ZH PDF) |
| 其它名称： | MCP1525T-I/TTDKR |
MCP1525/41
4.2
Typical Application Circuits
4.2.2
A/D CONVERTER REFERENCE
4.2.1
NEGATIVE VOLTAGE REFERENCE
The MCP1525 and MCP1541 were carefully designed
to provide a voltage reference for Microchip’s 10-bit
A negative precision voltage reference can be
generated by using the MCP1525 or MCP1541 in the
and 12-bit families of ADCs. The circuit shown in
reference to the MCP3201, a 12-bit ADC.
V DD = 5.0V
C IN
0.1 μF
V DD = 5.0V
R 1
10 k Ω
C L
MCP1525
MCP1541
V IN 0.1%
V OUT
V SS
10 μF
R 2
10 k Ω
0.1%
V IN
V OUT
V SS
C L
10 μF
10 μF
V REF
MCP606
V SS = - 5.0V
V IN
IN+
IN–
V REF
MCP3201
3
0.1 μF
to PICmicro ?
Microcontroller
V REF = -2.5V, MCP1525
V REF = -4.096V, MCP1541
FIGURE 4-3:
Negative Voltage
FIGURE 4-4:
ADC Reference Circuit.
Reference.
In this circuit, the voltage inversion is implemented
using the MCP606 and two equal resistors. The voltage
at the output of the MCP1525 or MCP1541 voltage
reference drives R 1 , which is connected to the inverting
input of the MCP606 amplifier. Since the non-inverting
input of the amplifier is biased to ground, the inverting
input will also be close to ground potential. The second
10 k Ω resistor is placed around the feedback loop of
the amplifier. Since the inverting input of the amplifier is
high-impedance, the current generated through R 1 will
also flow through R 2 . As a consequence, the output
voltage of the amplifier is equal to -2.5V for the
MCP1525 and -4.1V for the MCP1541.
DS21653B-page 10
? 2005 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP1541 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2.5V AND 4.096V VOLTAGE REFERENCES |
| MCP1541-I | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2.5V and 4.096V Voltage References |
| MCP1541I/TO | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2.5V and 4.096V Voltage References |
| MCP1541-I/TO | 功能描述:基准电压& 基准电流 4.096V 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 |
| MCP1541-I/TO | 制造商:Microchip Technology Inc 功能描述:Voltage Regulator IC Voltage Regulator T |
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