Build with DS18B20 — Datasheet Specs & AI Design Help

00 — Overview

What the DS18B20 does

The DS18B20 is a programmable resolution single-bus temperature sensor featuring a 64-bit unique serial number. It operates across a range of -55°C to +125°C with an accuracy of ±0.4°C between -10°C and +70°C. The device supports 9 to 12-bit resolution options and a conversion time of less than 750ms at 12-bit precision. It functions with a supply voltage of 2.5V to 5.5V and supports both direct power and parasitic power modes. This component is typically used for temperature control in industrial systems, HVAC environments, building monitoring, grain storage, and consumer applications. It allows distributed multi-point measurements without requiring external components.

Next step

Start building with DS18B20 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for DS18B20
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	—	1 mA	1.5 mA	VDD = 5V; 14. 直流特性	HuaXuanYang datasheet, p. 19 — 14. 直流特性
supply voltage range	2.5 V	—	5.5 V		HuaXuanYang datasheet, p. 19 — 14. 直流特性
operating temperature	-55 °C	—	125 °C		HuaXuanYang datasheet, p. 2
standby current	—	750 nA	—	IDDS, typical	HuaXuanYang datasheet, p. 19 — 14. 直流特性
data retention	10 year	—	—	-55°C to +55°C; eeprom; 15\. 交流特性	HuaXuanYang datasheet, p. 20 — 15\. 交流特性

02 — Alternatives

Closest matches to DS18B20

MAX31820 1.9× lower sample rate, 1.2× lower supply voltage range, similar operating temperature

MAX31820MCR+ 1.9× lower sample rate, 1.2× lower supply voltage range, similar operating temperature

TMP112 1.6× higher sample rate, 1.6× lower supply voltage range, 1.5× lower standby current

SHT30-DIS 4.0× higher sample rate, 1.2× higher operating temperature, 1.2× lower supply voltage range

TMP102 5.0× lower standby current, 1.6× higher sample rate, 1.2× higher operating temperature

MAX31865 2.0× higher quiescent current, 1.2× higher operating temperature, 1.2× lower supply voltage range

DHT22 5.0× lower sample rate, 3.8× lower standby current, 1.8× lower operating temperature

ICM-42607-C 2.2× lower supply voltage range, 1.8× lower quiescent current, 1.6× lower operating temperature

03 — FAQ

Frequently asked questions

What is the data retention time for the DS18B20 EEPROM under the specified conditions?

The data retention is 10 year at -55°C to +55°C.

What is the maximum operating temperature of the DS18B20?

The maximum operating temperature is 125 °C.

What is the quiescent current of the DS18B20 under DC characteristics when VDD = 5V?

The quiescent current is 1 mA.

What is the typical standby current (IDDS) for the DS18B20?

The typical standby current (IDDS) is 750 nA.

What is the maximum supply voltage for the DS18B20?

The maximum supply voltage is 5.5 V.