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MCP9700 bảng dữ liệu(PDF) 1 Page - Microchip Technology |
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MCP9700 bảng dữ liệu(HTML) 1 Page - Microchip Technology |
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1 / 18 page  © 2005 Microchip Technology Inc. DS21942B-page 1 MCP9700/01 Features • Tiny Analog Temperature Sensor • Available Packages: SC70-5 • Wide Temperature Measurement Range: - -40°C to +125°C • Accuracy: ±4°C (max.), 0°C to +70°C • Optimized for Analog-to-Digital Converters (ADCs): - MCP9700: 10.0 mV/°C (typ.) - MCP9701: 19.5 mV/°C (typ.) • Wide Operating Voltage Range: - MCP9700: VDD = 2.3V to 5.5V - MCP9701: VDD = 3.1V to 5.5V • Low Operating Current: 6 µA (typ.) • Optimized to Drive Large Capacitive Loads Typical Applications • Hard Disk Drives and Other PC Peripherals • Entertainment Systems • Home Appliance • Office Equipment • Battery Packs and Portable Equipment • General Purpose Temperature Monitoring Description The MCP9700/01 Linear Active Thermistor™ Intergrated Circuit (IC) is an analog temperature sen- sor that converts temperature to analog voltage. It’s a low-cost, low-power sensor with an accuracy of ±4°C from 0°C to +70°C while consuming 6 µA (typ.) of operating current. Unlike resistive sensors (such as thermistors), the Linear Active Thermistor IC does not require an additional signal-conditioning circuit. Therefore, the biasing circuit development overhead for thermistor solutions can be avoided by implementing this low-cost device. The voltage output pin (VOUT) can be directly connected to the ADC input of a microcontroller. The MCP9700 and MCP9701 temperature coefficients are scaled to provide a 1 °C/bit resolution for an 8-bit ADC with a reference voltage of 2.5V and 5V, respectively. The MCP9700/01 provides a low-cost solution for applications that require measurement of a relative change of temperature. When measuring relative change in temperature from +25°C, an accuracy of ±1°C (typ.) can be realized from 0°C to +70°C. This accuracy can also be achieved by applying system calibration at +25°C. In addition, this family is immune to the effects of parasitic capacitance and can drive large capacitive loads. This provides Printed Circuit Board (PCB) layout design flexibility by enabling the device to be remotely located from the microcontroller. Adding some capacitance at the output also helps the output transient response by reducing overshoots or undershoots. However, capacitive load is not required for sensor output stability. Package Type Typical Application Circuit GND VDD VOUT NC 4 1 2 3 5 SC70-5 NC GND VDD MCP9700/01 PICmicro® MCU ANI MCLR VDD 10 k Ω VSS VDD VOUT Cbypass VDD 0.1 µF Low-Power Linear Active Thermistor™ ICs |
Số phần tương tự - MCP9700 |
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Mô tả tương tự - MCP9700 |
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