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DHT22DS18B20

Structured comparison

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Comparison of DHT22, DS18B20
Attribute	DHT22AM2302	DS18B20DS18B20
Overview
Manufacturer	Aosong (Guangzhou)	Analog Devices (Maxim)
Category	Humidity	Temperature
Object type	module	ic
Package	Module	TO-92
Documented pins	4	3
Interfaces	Digital	Digital, 1-Wire
Lifecycle	ACTIVE	ACTIVE
Physical pin mapping	Unknown	Unknown
Browser simulation	Available	Not available
Electrical
Active Supply Current	1.5 mASource	1.5 mASource During an active temperature conversion.
Sleep Supply Current	50 µASource	1 µASource Idle/standby, ~1µA.
Operating Voltage	3.3 – 6 VSource	3 – 5.5 VSource
Interface
Interface	digitalSource	onewireSource
Performance
Measures	temperature, humiditySource	temperatureSource
Range Min	-40°C / 0%RHSource	-55°CSource
Range Max	80°C / 100%RHSource	125°CSource
Accuracy	±0.5°C / ±2%RHSource	±0.5°C (-10°C to +85°C); looser outside that bandSource
Resolution	0.1°C / 0.1%RHSource	9-12 bit configurable (0.5°C to 0.0625°C), default 12-bitSource
Sampling Rate	500 mHzSource Max sample rate is 0.5Hz — reading faster than every 2s returns stale data.	1.33 HzSource A 12-bit conversion takes up to 750ms (~1.3/sec); faster at lower resolution (9-bit ≈93.75ms).
Physical
Package	Module	TO-92Source Also commonly sold repackaged into a waterproof stainless-steel probe on a cable — same die, same electrical spec.
Length	Varies by vendor The bare AM2302 sensor housing is ~15.1×25×7.7mm per Aosong's datasheet, but the small carrier PCB most breakouts mount it on varies in size by vendor.	Unknown
Mounting	module	tht
Thermal
Min Operating Temp	-40 °CSource	-55 °CSource
Max Operating Temp	80 °CSource	125 °CSource

Overview

Manufacturer

DHT22: Aosong (Guangzhou)
DS18B20: Analog Devices (Maxim)

Object type

DHT22: module
DS18B20: ic

Package

DHT22: Module
DS18B20: TO-92

Documented pins

DHT22: 4
DS18B20: 3

Interfaces

DHT22: Digital
DS18B20: Digital, 1-Wire

Lifecycle

DHT22: ACTIVE
DS18B20: ACTIVE

Physical pin mapping

DHT22: Unknown
DS18B20: Unknown

Browser simulation

DHT22: Available
DS18B20: Not available

Electrical

Active Supply Current

DHT22: 1.5 mASource
DS18B20: 1.5 mASource
During an active temperature conversion.

Sleep Supply Current

DHT22: 50 µASource
DS18B20: 1 µASource
Idle/standby, ~1µA.

Operating Voltage

DHT22: 3.3 – 6 VSource
DS18B20: 3 – 5.5 VSource

Interface

DHT22: digitalSource
DS18B20: onewireSource

Performance

Measures

DHT22: temperature, humiditySource
DS18B20: temperatureSource

Range Min

DHT22: -40°C / 0%RHSource
DS18B20: -55°CSource

Range Max

DHT22: 80°C / 100%RHSource
DS18B20: 125°CSource

Accuracy

DHT22: ±0.5°C / ±2%RHSource
DS18B20: ±0.5°C (-10°C to +85°C); looser outside that bandSource

Resolution

DHT22: 0.1°C / 0.1%RHSource
DS18B20: 9-12 bit configurable (0.5°C to 0.0625°C), default 12-bitSource

Sampling Rate

DHT22: 500 mHzSource
Max sample rate is 0.5Hz — reading faster than every 2s returns stale data.
DS18B20: 1.33 HzSource
A 12-bit conversion takes up to 750ms (~1.3/sec); faster at lower resolution (9-bit ≈93.75ms).

Physical

Package

DHT22: Module
DS18B20: TO-92Source
Also commonly sold repackaged into a waterproof stainless-steel probe on a cable — same die, same electrical spec.

Length

DHT22: Varies by vendor
The bare AM2302 sensor housing is ~15.1×25×7.7mm per Aosong's datasheet, but the small carrier PCB most breakouts mount it on varies in size by vendor.
DS18B20: Unknown

Mounting

DHT22: module
DS18B20: tht

Thermal

Min Operating Temp

DHT22: -40 °CSource
DS18B20: -55 °CSource

Max Operating Temp

DHT22: 80 °CSource
DS18B20: 125 °CSource

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Compare electronics parts

Choose 2–4 parts

Structured comparison

Overview

Manufacturer

Category

Object type

Package

Documented pins

Interfaces

Lifecycle

Physical pin mapping

Browser simulation

Electrical

Active Supply Current

Sleep Supply Current

Operating Voltage

Interface

Interface

Performance

Measures

Range Min

Range Max

Accuracy

Resolution

Sampling Rate

Physical

Package

Length

Mounting

Thermal

Min Operating Temp

Max Operating Temp