The MAX7500–MAX7504 temperature sensors accurately measure temperature and provide an overtemperature alarm/interrupt/shutdown output. These devices convert the temperature measurements to digital form using a high-resolution, sigma-delta, analog-to-digital converter (ADC). Communication is through an I2C-compatible 2-wire serial interface. The MAX7500/MAX7501/MAX7502 integrate a timeout feature that offers protection against I2C bus lockups. The MAX7503/MAX7504 do not include the timeout feature.
The 2-wire serial interface accepts standard write byte, read byte, send byte, and receive byte commands to read the temperature data and configure the behavior of the open-drain overtemperature shutdown output.
The MAX7500 features three address select lines, while the MAX7501–MAX7504 feature two address select lines and an active-low RESET input. The MAX7500/MAX7501/MAX7502s' 3.0V to 5.5V supply voltage range, low 250μA supply current, and a lockup-protected I2C-compatible interface make them ideal for a wide range of applications, including personal computers (PCs), electronic test equipment, and office electronics.
The MAX7500–MAX7504 are available in 8-pin μMAX and SO packages and operate over the -55°C to +125°C temperature range.
Feature
- Timeout Prevents Bus Lockup (MAX7500, MAX7501, MAX7502)
- Hardware Reset for Added Protection
- I2C Bus Interface
- 3.0V to 5.5V Supply Voltage Range
- 250μA (typ) Operating Supply Current
- 3μA (typ) Shutdown Supply Current
- ±1.5°C (max) Temperature Accuracy (-25°C to +100°C, 3-σ)
- μMAX, SO Packages Save Space
- Separate Open-Drain OS Output Operates as Interrupt or Comparator/Thermostat Input
- Register Readback Capability
- Improved LM75 Second Source
Applications
- Electronic Test Equipment
- Industrial Process Control
- Office Electronics
- PCs
- Servers
