MAXIM OFFERS +145°C PRECISION SMBus-COMPATIBLE REMOTE/LOCAL TEMPERATURE SENSORS WITH OVERTEMPERATURE ALARMS
SUNNYVALE, CA-September 3, 2002-Maxim Integrated Products
(NASDAQ: MXIM) introduces the MAX6692/MAX6649, precise two-channel digital temperature sensors that accurately measure the temperature of a remote PN junction within ±1°C and its own die to within ±2°C. Both temperature sensors include two programmable alarms and report temperature in digital form over the SMBus™ interface. The MAX6692 is designed to operate over the 55°C to +125°C temperature range, with performance optimized from +60°C to +100°C, while the MAX6649 operates over a temperature range of -55°C to +145°C with performance optimized from +100°C to +145°C.
To enhance system reliability, the MAX6692/MAX6649 include SMBus timeout. A fault queue, when enabled, prevents the ALERT-bar and OVERT-bar outputs from settling until a fault has been detected three consecutive times. The programmable conversion rate allows the user to optimize supply current and temperature update rate to match system needs.
The MAX6692/MAX6649 SMBus interface accepts standard system management write byte, read byte, send byte, and receive byte commands to read the temperature data and to program the alarm thresholds. The data format is two's complement, 10 bits plus sign, with each LSB corresponding to 0.125°C. Measurements can be done autonomously, with the conversion rate programmed by the user or in a single-shot mode.
At two conversions per second, the MAX6692/MAX6649 operate with a 250µA supply current. The MAX6692/MAX6649 have a supply voltage range of 3V to 5.5V and are available in 8-pin µMAX and SO packages. Prices start at $1.80 for the MAX6692 and $1.89 for the MAX6649 (1000--up, FOB USA).
SMBus is a trademark of Intel Corp.
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