Parts comparison

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DS18B20DHT22

Structured comparison

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

Overview

Manufacturer

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

Object type

DS18B20: ic
DHT22: module

Package

DS18B20: TO-92
DHT22: Module

Documented pins

DS18B20: 3
DHT22: 4

Interfaces

DS18B20: Digital, 1-Wire
DHT22: Digital

Lifecycle

DS18B20: ACTIVE
DHT22: ACTIVE

Physical pin mapping

DS18B20: Unknown
DHT22: Unknown

Browser simulation

DS18B20: Not available
DHT22: Available

Electrical

Active Supply Current

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

Sleep Supply Current

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

Operating Voltage

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

Interface

DS18B20: onewireSource
DHT22: digitalSource

Performance

Measures

DS18B20: temperatureSource
DHT22: temperature, humiditySource

Range Min

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

Range Max

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

Accuracy

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

Resolution

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

Sampling Rate

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

Physical

Package

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

Length

DS18B20: Unknown
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.

Mounting

DS18B20: tht
DHT22: module

Thermal

Min Operating Temp

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

Max Operating Temp

DS18B20: 125 °CSource
DHT22: 80 °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