LM77CIM-3

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Temperature Sensors - Analog and Digital Output are instrumentation devices used to measure temperature. The LM77CIM-3 is an integrated temperature sensor with analog and digital output. The device is suitable for a wide range of temperature measurement applications in industrial, medical, and consumer electronics.

The LM77CIM-3 operates with a power supply voltage of 3V, and can measure a temperature range from -55°C to +85°C with an accuracy of ±3°C. The device has an analog output signal that is linearly proportional to the ambient temperature along with a digital output that can be used to control an external heat sink or fan. The internal functional blocks of LM77CIM-3 are a temperature sensor, an analog-to-digital converter, and two digital output drivers.

The LM77CIM-3 temperature sensor is based on a CMOS integrated circuit with an on-chip matched diode. The diode is formed by a transconductance amplifier with integrated linearization. When the on-chip diode voltage changes due to temperature variation, the transconductance amplifier converts it into a proportional output current. This current is monitored by an internal current-to-voltage converter, which converts it into a temperature output voltage.

The output of the current-to-voltage converter feeds an analog-to-digital converter, which is used to convert the signal into a digital output. The digital output is divided into two separate digital output enable lines. The first line controls the voltage regulator used for biasing the temperature sensor and converter circuitry while the second line drives the digital output drivers. The digital output drivers can be used to control external heat sinks or fans.

Overall, the LM77CIM-3 is an integrated temperature sensor with analog and digital output. It is ideal for temperature measurement applications in both industrial and consumer electronics. The device is capable of measuring a temperature range from -55°C to +85°C with an accuracy of ±3°C. It is cost-effective and has an integrated analog-to-digital converter and two digital output drivers for controlling external heat sinks and fans. The LM77CIM-3 is a reliable, versatile, and easy to use product.

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