The DS2450S is an 8-bit digital temperature sensor that measures analog voltages over the 1-Wire® bus. It features user programmable input range, resolution, and alarm thresholds.
The DS2450 1‑Wire Quad A/D Converter provides four high‑impedance analog inputs that can be individually programmed for input range (2.56 V or 5.12 V), resolution (1‑16 bits) and alarm thresholds. It operates from a single 4.5‑5.5 V supply and can draw power directly from the 1‑Wire bus (parasite power) or from a VCC pin, consuming as little as 2.5 mW when active.
Communication follows the standard Dallas Semiconductor 1‑Wire protocol, supporting regular speed (up to 16.3 kbps) and over‑drive mode (up to 142 kbps). All device registers are memory‑mapped, with on‑chip CRC16 protection for reliable data transfer. The datasheet includes detailed electrical characteristics, absolute maximum ratings, and command flow charts for reading and writing memory and performing conversions.
| Supply Voltage (VCC) | 4.5 V – 5.5 V |
|---|---|
| Number of Analog Input Channels | 4 |
| Quiescent Current (VCC powered) | 20 µA |
The DS2450 operates from a supply voltage between 4.5 V and 5.5 V.
It provides four independent high‑impedance analog input channels.
Yes, it can draw power from the 1‑Wire bus (parasite power) when VCC is not supplied.