DS7505 is a low voltage (1.7V to 3.7V) digital thermometer and thermostat that provides 9-, 10-, 11-, or 12-bit digital temperature readings over a -55°C to +125°C range with ±0.5°C accuracy over a -0°C to +70°C range. A 9-bit resolution mode is software compatible with the LM75. Communication with the DS7505 is achieved through a simple 2-wire serial interface. Three address pins allow up to eight DS7505 devices to operate on the same 2-wire bus, which greatly simplifies distributed temperature-sensing applications. The DS7505 thermostat has a dedicated open-drain output (O.S.) and programmable fault tolerance, which allows the user to define the number of consecutive error conditions that must occur before O.S. is activated. There are two thermostatic operating modes that control thermostat operation based on user-defined trip points (TOS and THYST) that are stored in EEPROM registers.
The DS7505 digital thermometer and thermostat operates from 1.7 V to 3.7 V and measures temperatures from –55 °C to +125 °C with configurable resolution of 9 to 12 bits. It communicates via a simple 2‑wire serial interface and supports up to eight devices on the same bus using three address pins.
The device includes a dedicated open‑drain thermostat output, programmable fault tolerance, and a shutdown mode for low‑power applications. All settings are stored in non‑volatile EEPROM and can be copied from shadow SRAM. Package options include 8‑pin SO and pMAX® packages.
| Supply voltage range | 1.7 V to 3.7 V |
|---|---|
| Temperature measurement range | -55 °C to +125 °C |
| Resolution options | 9‑12 bits (0.5 °C to 0.0625 °C) |
| 9‑bit conversion time | 25 ms (max) |
| Accuracy | ±0.5 °C over 0 °C to +70 °C |
| Interface | 2‑wire serial (SDA, SCL) |
| Address pins | Three (A0, A1, A2) allowing up to 8 devices |
| Package types | 8‑pin SO and pMAX® |
The DS7505 operates from 1.7 V to 3.7 V supply voltage.
It has three address pins (A0, A1, A2) that allow up to eight DS7505 devices on the same 2‑wire bus.
The factory default resolution at power‑up is 9 bits.