The MAX6629-MAX6632 are local digital temperature sensors with an SPI™-compatible serial interface. The temperature is converted to a 12-bit + sign word with a resolution of 0.0625°C/LSB. An extended temperature range provides useful readings up to +150°C. These sensors are 3-wire serial interface SPI compatible, allowing the MAX6629-MAX6632 to be readily connected to a variety of microcontrollers (µCs). The MAX6629-MAX6632 are read-only devices, simplifying their use in systems where only temperature data is required. All four digital temperature sensors require very little supply current, making them ideal for portable systems. The MAX6631/MAX6632 perform a temperature-to-digital conversion once every 8s and require minimal average supply current, 32µA (typ). The MAX6629/MAX6630 perform a conversion once every 0.5s and require only 200µA (typ) supply current. Any of these temperature sensors can perform conversions more often--up to approximately four conversions per second by reading the conversion results more often.
The MAX6629‑MAX6632 family provides 12‑bit plus sign temperature conversion with a resolution of 0.0625 °C per LSB. They operate from 3.0 V to 5.5 V supply and support temperatures from –55 °C up to +150 °C, making them suitable for automotive, HVAC, industrial control and portable applications. The devices are read‑only, low‑power sensors that can be interfaced to any microcontroller via a three‑wire SPI‑compatible serial bus.
Typical applications include thermal control loops, battery‑operated systems, and under‑hood automotive monitoring. The sensors offer two conversion speed options: fast 0.5 s conversions (MAX6629/MAX6630) and low‑power 8 s conversions (MAX6631/MAX6632). Power‑down and idle modes are implemented by controlling the CS line, and a hardware shutdown can be achieved by pulling a logic gate output low.
| Resolution | 0.0625 °C/LSB |
|---|---|
| Supply Voltage Range | 3.0 V to 5.5 V |
| Typical Supply Current (MAX6631/MAX6632) | 32 µA typ |
| Typical Supply Current (MAX6629/MAX6630) | 200 µA typ |
| Accuracy (0 °C to +70 °C) | ±1 °C max |
| Conversion Time | 180 ms to 320 ms |
They operate from 3.0 V to 5.5 V supply.
The typical supply current is 32 µA.
They can perform up to about four conversions per second when the conversion results are read frequently.
The resolution is 0.0625 °C per LSB.