DS2482-100
Single-Channel 1-Wire Master
I²C to 1-Wire Bridge Device that Interfaces Directly to Standard (100kHz max) or Fast (400kHz max) I²C Masters to Perform Bidirectional Protocol Conversion Between the I²C Master and Any Downstream 1-Wire Slave Device
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Overview
Features and Benefits
- Allows Easy Interface Between a I2C Microport and a 1-Wire Slave
- I2C Host Interface Supports 100kHz and 400kHz I2C Communication Speeds
- 1-Wire Master IO with Selectable Active or Passive 1-Wire Pullup
- Provides Reset/Presence, 8-Bit, Single-Bit, and 3-Bit 1-Wire IO Sequences
- Standard and Overdrive 1-Wire Communication Speeds
- Two Address Inputs for I2C Address Assignment
- Minimizes Line Noise Reducing System EMI
- Slew-Controlled 1-Wire Edges
- Supports EEPROMs, Temperature Sensors, or Other 1-Wire Slaves That Have Momentary High Source
Current Modes
- Strong 1-Wire Pullup Provided by an Internal Low-Impedance Signal Path
- PCTLZ Output to Optionally Control an External MOSFET for Stronger Pullup Requirements
- Operating Range: 2.9V to 5.5V, -40°C to +85°C
- 8-Pin (150 mils) SO and 9-Bump WLP Packages
Product Details
The DS2482-100 is an I²C to 1-Wire® bridge device that interfaces directly to standard (100kHz max) or fast (400kHz max) I²C masters to perform bidirectional protocol conversion between the I²C master and any downstream 1-Wire slave devices. Relative to any attached 1-Wire slave device, the DS2482-100 is a 1-Wire master. Internal factory trimmed timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting both standard and Overdrive 1-Wire communication speeds. To optimize 1-Wire waveform generation, the DS2482-100 performs slew rate control on rising and falling 1-Wire edges and provides additional programmable features to match drive characteristics to the 1-Wire slave environment. Programmable strong pullup features support 1-Wire power delivery to 1-Wire devices such as EEPROMs and sensors. The DS2482-100 combines these features with an output to control an external MOSFET for enhanced strong pullup application. The I²C slave address assignment is controlled by two binary address inputs, resolving potential conflicts with other I²C slave devices in the system.
Applications
- Cell Phones/PDAs
- Industrial Sensors
- Medical Instruments
- Printers
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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DS2482-100 Reliability Data1/12/2023
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Implementing an Isolated 1-Wire Bus5/17/2012
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Tutorial: Improve Sensor Performance and SNR in Pulse Oximeter Designs6/21/2010
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Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications4/18/2007
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Determining the Recovery Time for Multiple-Slave 1-Wire® Networks6/21/2006
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How to Use the DS2482 I2C 1-Wire® Master12/22/2005
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1-Wire Communication Through Software5/30/2002
Product Recommendations
DS2482-100 Companion Parts
Recommended Related Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| DS2482S-100+ | Material Declaration | Reliability Data | Small-Outline IC, Narrow (0.15in) | |
| DS2482S-100+T&R | Material Declaration | Reliability Data | Small-Outline IC, Narrow (0.15in) | |
| DS2482X-100+T | Material Declaration | Reliability Data | Wafer-Level Package 3x3 Bump, Depopulated | |
| DS2482X-100+U | Material Declaration | Reliability Data | Wafer-Level Package 3x3 Bump, Depopulated | |
| Wafer Fabrication Data | DS2482-100 Reliability Data |
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