Digital Pressure Sensor IC TCN75AVOA Temperature-to-Digital Converter
temperature sensor ic
,electronic pressure sensors
Digital Pressure Sensor IC TCN75AVOA Temperature-to-Digital Converter
2-Wire Serial Temperature Sensor
Features:
• Temperature-to-Digital Converter
• Accuracy:
- ±1 (typ.) from -40°C to +125°C
- ±2°C (max.) from +40°C to +125°C
• User-selectable Resolution: 0.5°C to 0.0625°C
• Operating Voltage Range: 2.7V to 5.5V
• 2-wire Interface: I2C™ Compatible
• Operating Current: 200 μA (typ.)
• Shutdown Current: 2 μA (max.)
• Power-saving One-shot Temperature Measurement
• Available Packages: MSOP-8, SOIC-8
Typical Applications:
• Personal Computers and Servers
• Hard Disk Drives and Other PC Peripherals
• Entertainment Systems
• Office Equipment
• Data Communication Equipment
• General Purpose Temperature Monitoring
Description:
Microchip Technology Inc.’s TCN75A digital temperature sensor converts temperatures between -40°C and +125°C to a digital word, with ±1°C (typ.) accuracy. The TCN75A product comes with user-programmable registers that provide flexibility for temperature-sensing applications. The register settings allow user-selectable, 0.5°C to 0.0625°C temperature measurement resolution, configuration of the power-saving Shutdown and One-shot (single conversion on command while in Shutdown) modes and the specification of both temperature alert output and hysteresis limits. When the temperature changes beyond the specified limits, the TCN75A outputs an alert signal. The user has the option of setting the alert output signal polarity as an active-low or active-high comparator output for thermostat operation, or as temperature event interrupt output for microprocessor-based systems.
This sensor has an industry standard 2-wire, I2C™ compatible serial interface, allowing up to eight devices to be controlled in a single serial bus. These features make the TCN75A ideal for low-cost, sophisticated multi-zone temperature-monitoring applications.
Typical Application
Absolute Maximum Ratings †
VDD................................................................. 6.0V
Voltage at all Input/Output pins .... GND – 0.3V to 5.5V Storage temperature ..........................-65°C to +150°C Ambient temp. with power applied .....-55°C to +125°C Junction Temperature (TJ).................................. 150°C ESD protection on all pins (HBM:MM)....... (4 kV:400V) Latch-up current at each pin ......................... ±200 mA
Package Types
†Notice: Stresses above those listed under “Maximum ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability
DC CHARACTERISTICS
| Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground, and TA = -40°C to +125°C. |
| Parameters | Sym | Min | Typ | Max | Unit | Conditions |
| Power Supply |
| Operating Voltage Range | VDD | 2.7 | — | 5.5 | V | |
| Operating Current | IDD | — | 200 | 500 | μA | Continuous operation |
| Shutdown Current | ISHDN | — | 0.1 | 2 | μA | Shutdown mode |
| Power-On Reset (POR) Threshold | VPOR | — | 1.7 | — | V | VDD falling edge |
| Power Supply Rejection | Δ°C/ΔVDD | — | 0.2 | — | °C/V | VDD = 2.7V to 5.5V |
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