Match the reference to the application.
The design needs the documented DS28EA00 capabilities, including sequence detection where required. Plan the extra chain connections with the host.
Review the specification →GUILCOR · Digital sensing
DS28EA00
temperature sensors
A digital thermometer with sequence detection and two programmable I/O pins. It addresses an important installation problem: discovering where each uniquely identified sensor sits in a wired chain.
Understand the reference
Associate each reading with its position.
Ordinary ROM discovery identifies devices but does not establish their physical order. Sequence detection needs the dedicated PIO chain connections and the matching command sequence. The shared DQ line alone is not sufficient to determine position.
SELECTION / YOUR APPLICATION
Is DS28EA00 the right starting point?
Review DS18B20-PAR alongside DS28EA00.
Compare the sensing function, power arrangement, command set and conversion timing. A common 1-Wire bus does not make all devices equivalent to the host software.
Explore DS18B20-PAR →Keep the complete specification together.
Keep the full device reference, host implementation and wiring layout. Check supply or parasite power, conversion requirements and how individual devices are identified.
Prepare your enquiry →These links support a specification review. They do not establish interchangeable parts or availability of a complete assembly.
Interactive application guide
Compare identity discovery with position discovery.
This diagram uses fictional labels A, B and C, not real ROM codes. Switch between a shared data bus and a correctly wired sequence-detection chain to see which information is available.
Identity information
Position information
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Technical reference
Reference details for the application.
| IC operating range | −40 to +85 °C |
|---|---|
| Accuracy interval | ±0.5 °C from −10 to +85 °C |
| Resolution | 9 to 12 bits |
| External supply | 3.0 to 5.5 V |
| Package | 8-pin µSOP |
| Additional functions | Sequence detection / two PIO pins |
Apply the limits to the right component.
The sensing IC, finished probe and host electronics have separate requirements. Cable insulation, sealing, connector, supply and mounting may impose a narrower operating range. A temperature step is not an accuracy guarantee, and an electronic conversion time is not a thermal response time.
Racks, storage towers and multi-level monitoring benefit from a clear mapping between a sensor identifier and its installed position.
Wiring and power
Specify wiring, power and the host together.
Device connections
For sequence detection, connect the first PIOB input to GND and link each PIOA output to the next PIOB input as specified in the datasheet. The PIO pins have another role when used as general-purpose I/O; plan that allocation before wiring.
Bus integration
Choose the pullup and master from the selected device requirements and measured network behaviour. A resistor value taken from an example is not a universal design rule. Check logic levels, ground reference, noise exposure and the voltage at the furthest sensor.
Cable colours and a familiar package are not a pinout. Use the connector drawing and exact part document. Record the relationship between each ROM identity and its installed location; update that mapping after replacement.
Acquisition sequence
Make each reading traceable.
Discover
Inventory the bus and select the intended device identity.
Convert
Issue the device-specific command and satisfy its timing and power needs.
Validate
Read the correct registers, check CRC where provided and reject invalid or stale results.
Use
Apply the correct scale, location mapping and application limits.
Measurement quality
Separate electrical behaviour from thermal performance.
Accuracy and calibration
Choose the error limit over the actual operating interval. Add installation and readout effects. Define any calibration and periodic verification required by the application; factory calibration does not establish a universal no-maintenance policy.
Response and mounting
A sheath, potting material and mounting contact change how fast the sensing element follows the medium. Verify response in the intended flow and installation, rather than using conversion time as the finished-probe response.
Power and self-heating
Average dissipation depends on supply, conversion duty and surrounding electronics. Test the assembled probe at the intended reading rate. Do not assume a universal self-heating offset from the interface name.
Form factor library
Choose your probe format.
Choose the shape and mounting for the measurement point. These are GUILCOR probe families and a design service; confirm the compatible element, dimensions, cable and complete assembly for the selected reference.
Frequently asked questions
Questions before specifying the assembly.
Will ordinary ROM search tell me which sensor is first on the cable?
No. Physical sequence requires the dedicated sequence-detection wiring and commands, or an independently maintained installation map.
Does 1-Wire literally need only one conductor?
Communication needs the data line and a ground reference. External power can add a supply conductor; parasite power has specific strong-pullup and timing requirements.
How many sensors can share the cable?
Addressing supports multiple devices, but the practical limit depends on the master, loading, wiring, power and timing. Validate the actual network rather than selecting a count from the protocol name.
What should I send for a probe quotation?
Send the reference, temperature interval, required error and response, mounting drawing, cable and connector details, host interface, quantity and any calibration requirement.
Technical sources
Continue with the reference documents.
GUILCOR / YOUR ENQUIRY
Define your DS28EA00 enquiry.
Send the device reference, host and wiring arrangement together. Include how the sensor is powered and how measurements are scheduled across the bus.
Missing a reference or datasheet?
Send the component marking, equipment reference and any photographs or documents you have. These provide a starting point for identifying what must be confirmed.
The outline helps prepare your enquiry. Copying it does not send a request.
FOUR DETAILS THAT MOVE THE DISCUSSION FORWARD
01
Device and 1-Wire host
Exact device reference, host or master, supply arrangement, pullup implementation, command support and required update interval.
02
Measurement conditions
Measured quantity, temperature interval, required accuracy, conversion timing, sensor count and identification or position requirements.
03
Assembly and connection
Cable lengths, topology and branches, connector and grounding, probe mounting, materials and environmental exposure.
04
Project and validation
Sample and production quantities, target delivery, calibration or documentation needs, and the checks required before approval.