Analog Devices Inc. DS28E18 1-Wire® to I2C/SPI Bridge
Analog Devices DS28E18 1-Wire® to I2C/SPI Bridge enables the sensor to be controlled by two wires from the host system. The DS28E18 simple communications bridge reduces the wire count from six (for SPI) or four (for I2C). The two wires use Maxim's 1-Wire protocol that combines power and signal on a single wire and is driven by the programmable I/O pins on the host's microcontroller. Analog Devices's 1-Wire protocol combines power and signal on a single wire driven by the programmable I/O pins on the host's microcontroller. The 1-Wire network supports connection lengths up to 100m and ten sensor nodes or more. The two wires from the host system implement this protocol.
Maxim Integrated DS28E18 1-Wire to I2C/SPI Bridge can be used for I2C slave devices. It communicates at standard mode (100kHz), fast mode (400kHz), or fast-mode plus (Fm+, 1MHz). Multiple clock rates are supported up to 2.3MHz in SPI mode. Configuring for I2C or SPI operation is performed with a 1-Wire command, while I2C is the power-on default. Two programmable GPIO pins are available for additional peripheral control operating in I2C mode.
Features
- Operate remote I2C or SPI devices using a single contact 1-wire interface
- Extending I2C/SPI communication distance
- Reduce six wires (for SPI) or four wires (for I2C) to two wires
- 512-byte sequencer for autonomous operation of attached devices
- Two configurable GPIO pins for additional peripheral control
- No external power required
- DS28E18 parasitically powered from 1-wire
- I2C/SPI peripheral power derived from the 1-wire line
- Flexible 1-wire and I2C/SPI master operational modes
- Supports standard (11kbps) and overdrive (90kbps) 1-wire communication
- 100kHz, 400kHz, and 1MHz for I2C slaves
- Up to 2.3MHz for SPI slaves
- Easy to integrate
- Small, 2mm x 3mm x 0.75mm, 8-pin TDFN package
- -40°C to +85°C operation
- 2.97V to 3.63V operating voltage range
Applications
- Examining environmental conditions
- Accessory identification and control
- Equipment configuration and monitoring
- Grain elevator monitoring
Block Diagram
Additional Resources
Associated Evaluation System
Analog Devices Inc. DS28E18EVKIT Evaluation System
Provides the hardware and software system for evaluating the DS28E18 1-Wire-to-I2C/SPI bridge.
Đã phát hành: 2020-07-15
| Đã cập nhật: 2025-08-14