The DS620 digital thermometer and thermostat provides low-voltage temperature measurements with ±0.5°C accuracy from 0°C to +70°C and an operating temperature range of -55°C to +125°C. It communicates over a 2-wire digital interface and is multidroppable for distributed-sensing applications. The DS620 has thermostat functionality with user-defined thresholds stored in EEPROM registers, and it can be configured for standalone thermostat operation. The programmable output (PO) pin serves as the thermostat output and can also function as an active-low control for peripheral devices.
The DS620 is a low‑voltage (1.7 V – 3.5 V) digital thermometer and thermostat that provides temperature measurements with ±0.5 °C accuracy from 0 °C to +70 °C and operates over a temperature range of –55 °C to +125 °C. It communicates via a standard 2‑wire serial bus and supports multidropping with three address pins, allowing up to eight devices on a single bus.
Key features include user‑selectable resolution (10‑ to 13‑bit), fast conversion time (200 ms max), an 8‑pin μSOP package, programmable thermostat thresholds stored in non‑volatile EEPROM, and a programmable output (PO) pin that can act as a thermostat output or a control signal for peripheral devices.
| Supply Voltage | 1.7 V to 3.5 V |
|---|---|
| Accuracy | ±0.5 °C (0 °C to +70 °C) |
| Operating Temperature Range | -55 °C to +125 °C |
| Resolution Options | 10‑ to 13‑bit (0.5 °C to 0.0625 °C per LSB) |
| Conversion Time (13‑bit) | 200 ms max |
| Package | 8‑Pin μSOP |
The DS620 operates from 1.7 V to 3.5 V.
It has three address pins (A0, A1, A2) allowing up to eight devices on a single bus.
Resolution can be set to 10‑, 11‑, 12‑, or 13‑bit, giving 0.5 °C, 0.25 °C, 0.125 °C, or 0.0625 °C per LSB.