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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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MCP970X 데이터시트(PDF) 1 Page - Microchip Technology |
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MCP970X 데이터시트(HTML) 1 Page - Microchip Technology |
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1 / 26 page  2005-2022 Microchip Technology Inc. and its subsidiaries DS20001942J MCP970X Features • Tiny Analog Temperature Sensor • Available Packages: - SC70-5, SOT-23-3, TO-92-3 (not available with the MCP9700B) • Wide Temperature Measurement Range: - -40°C to +125°C (Extended Temperature) - -40°C to +150°C (High Temperature) (MCP9700 and MCP9700B, SOT-23-3 and SC70-5 only) • Accuracy: - ±1°C (max.), +20°C to +70°C (MCP9700B) - ±2°C (max.), 0°C to +70°C (MCP9700A/9701A) - ±4°C (max.), 0°C to +70°C (MCP9700/9701) • Optimized for Analog-to-Digital Converters (ADCs): - 10.0 mV/°C (typical) (MCP9700/9700A/ 9700B) - 19.5 mV/°C (typical) (MCP9701/9701A) • Wide Operating Voltage Range: -VDD = 2.3V to 5.5V (MCP9700/9700A/ 9700B) -VDD = 3.1V to 5.5V (MCP9701/9701A) • Low Operating Current: 6 µA (typical) • Optimized to Drive Large Capacitive Loads Typical Applications • Automotive • Hard Disk Drives and Other PC Peripherals • Entertainment Systems • Home Appliance • Office Equipment • Battery Packs and Portable Equipment • General Purpose Temperature Monitoring General Description MCP9700/9700A/9700B and MCP9701/9701A sen- sors with Linear Active Thermistor Integrated Circuit (IC) comprise a family of analog temperature sensors that convert temperature to analog voltage. The low-cost, low-power sensors feature an accuracy of ±1°C from +20°C to +70°C (MCP9700B), ±2°C from 0°C to +70°C (MCP9700A/9701A) and ±4°C from 0°C to +70°C (MCP9700/9701) while consuming 6 µA (typ- ical) of operating current. Unlike resistive sensors, e.g., 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 a sensor from these low-cost devices. The Voltage Output pin (VOUT) can be directly connected to the ADC input of a microcontroller. The MCP9700/9700A/9700B and MCP9701/9701A 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 MCP9700/9700A/ 9700B output 0.1°C/bit for a 12-bit ADC with 4.096V reference. The MCP9700/9700A/9700B and MCP9701/9701A provide 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 (typical) can be realized from 0°C to +70°C. This accuracy can also be achieved by applying system calibration at +25°C. The MCP9700B can measure temperature with ±1°C from +20°C to +70°C without any system calibration. In addition, this family of devices 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 the stability of sensor output. Low-Power Linear Active Thermistor ICs |
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