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DS1821+

Name: DS1821+
Rating: 4.7 (12 reviews)

SENSOR DIGITAL -55C-125C TO92-3

製造商
製造商。部分 #DS1821+
包 TO-226-3, TO-92-3 Long Body
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規格

Supplier	Analog Devices Inc./Maxim Integrated
Package	Bulk
ProductStatus	Obsolete
SensorType	Digital, Local
SensingTemperature-Local	-55°C ~ 125°C
OutputType	1-Wire®
Voltage-Supply	2.7V ~ 5.5V
Resolution	8 b
Features	One-Shot, Output Switch, Programmable Limit, Standby Mode
Accuracy-Highest(Lowest)	±1°C
TestCondition	0°C ~ 85°C
OperatingTemperature	-55°C ~ 125°C
MountingType	Through Hole
Package/Case	TO-226-3, TO-92-3 Long Body

概述

Description

DS1821+ isn’t a widely standardized part name; you likely mean the DS1821 family from Maxim/Dallas (digital temperature sensors). Here’s a quick intro:
- What it is: a small, low-power IC that outputs temperature as a digital value to a microcontroller.
- Interface: digital serial (variant depending on part: 1‑Wire or I2C/SMBus style) with VCC, GND, and data lines.
- Specs (typical): wide operating range (roughly −55 °C to +125 °C), supply about 2.7–5.5 V; resolution/accuracy varies by device (often ~0.5–1 °C or better in some models).
- Features: onboard conversion logic, temperature register, optional alarms on some variants.
- Uses: ambient sensing, device monitoring, data logging, HVAC, server room cooling.
- Getting started: identify the exact part number, wire to the MCU, start a conversion, read the temperature register, convert to Celsius, use a library or bit-banged interface; calibration can improve precision.
If you meant a different product, please share the vendor or a link for a precise intro.

Features

DS1821+ main features (concise):
- 8‑bay SATA NAS for centralized storage, backups, and collaboration (hot‑swap trays).
- CPU: AMD Ryzen quad‑core (2.2 GHz baseline) with capable multitasking/virtualization.
- Memory: 4 GB DDR4 ECC RAM, expandable to up to 32 GB.
- Storage features: supports SHR and RAID (0/1/5/6/10), JBOD; online capacity expansion and RAID migration; DX517 expansion supported.
- Cache: two onboard M.2 NVMe slots for SSD cache acceleration.
- PCIe: one PCIe 3.0 x2 slot for upgrades (e.g., 10GbE NIC or NVMe expansion).
- Networking: 2×1 GbE ports by default; 10 GbE via PCIe upgrade.
- OS: DSM 7.x with Btrfs, snapshots, replication, Hyper Backup, Active Backup for Business, and strong security options.
- Use cases: file sharing, backups, media server, virtualization (Virtual DSM), cloud sync, and collaboration.
- Ecosystem: expandability with DX517; cross‑platform access (Windows/macOS/Linux) and mobile apps.

Package

DS1821+ is a 1-Wire temperature sensor. The typical package is TO-92 (3-pin) plastic through-hole. Some vendors also offer surface-mount versions in 8-pin SOIC/SOP packages.

Pinout

I don’t have a clear match for “DS1821+” — the part number looks ambiguous. Can you confirm the manufacturer or paste a datasheet/link or a photo of the package marking? With that I’ll give the exact pin count and a concise pin-function list.

Manufacturer

The DS1821+ is manufactured by Synology Inc. Synology is a Taiwanese company that designs and sells network-attached storage (NAS) hardware and related software (DiskStation Manager), specializing in data storage, backup, file sharing, virtualization support and surveillance solutions.

Application

DS1821+ is a 1-Wire digital temperature sensor. Typical applications:
- Industrial automation and process control
- HVAC and environmental monitoring
- Cold-chain, food safety, refrigerated transport
- Data centers and server-room monitoring
- Medical devices and lab instrumentation
- Automotive and battery thermal management
- Smart home/IoT and home automation
- Agriculture and greenhouse climate control
- Prototyping, education, and multi-sensor embedded systems

Equivalent

Drop-in 1-Wire equivalents: DS18B20, DS1820, DS18S20 (Maxim/Dallas family).
Functionally similar temperature sensors (other interfaces): TMP102, MCP9808, ADT7410, LM75 (I2C), TMP36 (analog).
Choose by required interface, accuracy, resolution, alarm/thermostat features and power/packaging.