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Texas Instruments TMP1826DGKR
- Part No.:
- TMP1826DGKR
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TMP1826DGKR.pdf
- Description:
- SINGLE-WIRE 0.3C ACCURATE DIGITA
- Quantity:
- Payment:
- Shipping:
Inventory:875
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Product details
Overview
TMP1826DGKR from Texas Instruments is a 2-Kbit EEPROM-integrated ±0.2°C digital temperature sensor operating over –55°C to +150°C, compliant with the 1-Wire® protocol, bus-powered (1.7V–5.5V), and featuring four configurable open-drain I/O pins for alert or general-purpose use in thermal monitoring systems.
For engineers reviewing the TMP1826DGKR datasheet, TMP1826DGKR pinout, TMP1826DGKR application, or TMP1826DGKR equivalent, this device delivers high-accuracy temperature sensing with nonvolatile data storage, low-power operation (94µA active, 1.3µA shutdown), and robust ESD protection (±8-kV contact on SDQ) - critical for cold-chain loggers, EV charging infrastructure, and medical accessories requiring traceable NIST-calibrated readings.
Technical Context
The TMP1826DGKR implements a precision bandgap-based thermal sensing core with 16-bit resolution (7.8125 m°C/LSB), supporting both standard-speed (15.4 kbps) and overdrive-mode (90 kbps) 1-Wire® communication. Its dual power architecture allows seamless switching between VDD-powered and parasitic bus-powered operation without external components.
Internal EEPROM provides 2 Kb of user-programmable memory organized in 64-bit blocks with 256-bit page write protection, while four GPIOs (IO0–IO3) are software-configurable as digital inputs, outputs, or temperature-alert triggers - enabling host-side bus topology identification and event-driven thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temp accuracy (NGR) | ±0.2°C max from +10°C to +45°C - enables clinical-grade thermal validation in CPAP and battery chargers |
| Temp accuracy (DGK) | ±0.3°C max from –20°C to +85°C - suitable for industrial appliance control within common ambient ranges |
| EEPROM size | 2 Kb (256 bytes) - stores calibration offsets, device history, or firmware metadata without external memory |
| 1-Wire® speed | 90 kbps overdrive mode - reduces thermal read latency to <6.12 ms per conversion for real-time response |
| Supply range | 1.7V–5.5V (bus or VDD powered) - supports single-supply designs across 1.8V/3.3V/5V systems |
| ESD rating | ±8-kV IEC 61000-4-2 on SDQ - eliminates need for external TVS diodes in factory automation interfaces |
| Shutdown current | 1.3 µA at –55°C to +85°C - extends battery life in portable cold-chain monitors |
Pinout & Package
DGK package: 8-pin VSSOP (3.00 mm × 4.90 mm), thermally enhanced with exposed pad; compatible with standard 1-Wire® bus topologies and automated SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Required for VDD-powered mode; must be grounded in bus-powered configuration |
| GND | Ground reference | Common return for all signals and internal capacitor discharge path |
| SDQ | 1-Wire® bidirectional data | Carries power (bus mode) and data; integrates 8-kV ESD protection |
| ADDR | Address select input | Resistor-programmable short address (6.49kΩ–54.9kΩ) for multi-drop bus enumeration |
| IO0–IO3 | Configurable open-drain I/O | Support temperature alert, bus position detection, or host-controlled logic signaling |
Key Features
| Feature | Design Value |
|---|---|
| NIST-traceable 64-bit ID | Factory-programmed unique serial number enables secure device authentication and calibration traceability |
| High-precision temp format | 16-bit two's complement output (7.8125 m°C LSB) supports ±256°C range with sub-millidegree resolution |
| Flexible EEPROM protection | User-programmable 256-bit page write lock prevents accidental overwrite of critical calibration or configuration data |
| Multi-mode power architecture | Automatic fallback from VDD to bus-powered operation ensures uninterrupted sensing during supply faults |
| Temperature alert I/O | IO2 pin configurable as hardware interrupt on threshold breach - reduces MCU polling overhead in embedded systems |
Applications
| Factory Automation | Medical Accessories |
|---|---|
Use Scenario: Real-time thermal monitoring of motor windings and PLC cabinets in harsh industrial environments. IC Role / Device Role / Timing Role: Primary temperature sensor and nonvolatile logging node on shared 1-Wire® bus with up to 100+ devices. Use Value: ±0.3°C accuracy over –20°C to +85°C ensures compliance with IEC 61800-5-1 thermal class limits without external compensation. | Use Scenario: Temperature validation inside portable CPAP machines and infusion pump housings. IC Role / Device Role / Timing Role: Calibration-critical sensor feeding closed-loop heater control and FDA-required audit logs via integrated EEPROM. Use Value: NIST-traceable 64-bit ID and ±0.2°C accuracy from +10°C to +45°C meet ISO 13485 design verification requirements. |
| Battery Charger ICs | Cold Chain Logistics |
Use Scenario: Cell-level thermal profiling in multi-bay Li-ion charger stations for EVs and energy storage. IC Role / Device Role / Timing Role: Distributed temperature node communicating over long cable runs using 90-kbps overdrive mode. Use Value: Bus-powered operation eliminates local regulators; 1.3µA shutdown current extends standby time between charge cycles. | Use Scenario: Disposable temperature logger tags attached to pharmaceutical shipments across global supply chains. IC Role / Device Role / Timing Role: Self-contained sensor + memory node storing time-stamped thermal history without host intervention. Use Value: 10-year data retention at +150°C and –55°C to +150°C operating range ensure integrity across extreme transit conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor with EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP1827DGKR | Includes SHA-256-HMAC authenticated memory writes; identical accuracy, package, and 1-Wire® interface | Required for systems needing cryptographic integrity of stored calibration or usage logs | Select TMP1827DGKR when tamper-proof EEPROM writes are mandated by security policy or regulatory audit |
| DS18B20+T&R | Lower accuracy (±0.5°C), no integrated EEPROM, 1-Wire® compatible but lacks GPIOs and bus-powered optimization | Suitable only for basic temperature-only nodes where external memory and discrete I/O are acceptable | Choose DS18B20+T&R only for cost-sensitive legacy upgrades where EEPROM and alert I/O are omitted |
Compared with TMP1826DGKR, TMP1827DGKR adds hardware-based memory authentication at identical footprint and accuracy, while DS18B20+T&R sacrifices EEPROM, GPIOs, and precision for lower unit cost - making TMP1826DGKR optimal for integrated thermal-data logging where security and feature density are balanced.
Availability
TMP1826DGKR is available at Aetrix Electronics and suitable for factory automation, medical accessories, and EV charging infrastructure requiring stable component supply, long-term calibration traceability, and industrial-grade thermal reliability.
Supply support for TMP1826DGKR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and industrial longevity.
The TMP1826DGKR belongs to TI's high-accuracy 1-Wire® temperature sensor family, engineered specifically for applications demanding simultaneous sensing, nonvolatile storage, and bus-efficient communication in space-constrained, safety-critical thermal systems.
FAQ
What is the maximum operating temperature range supported by the TMP1826DGKR?
The TMP1826DGKR operates from –55°C to +150°C. In bus-powered overdrive mode, full-range operation is guaranteed up to +150°C; in standard-speed mode, the upper limit is +105°C across the full supply range or +125°C when VPUR exceeds 2.5V. This makes TMP1826DGKR suitable for under-hood automotive, industrial motor control, and high-temp sterilization equipment.
Does the TMP1826DGKR require an external pullup resistor on the SDQ line?
Yes, the TMP1826DGKR requires an external pullup resistor on the SDQ line for proper 1-Wire® communication. In bus-powered mode, the resistor value must be selected to maintain VPUR ≥1.7V during high-current operations like temperature conversion (94µA) and EEPROM programming (178µA); typical values range from 2.2kΩ to 4.7kΩ depending on bus capacitance and speed mode.
How does the TMP1826DGKR handle power failure during bus-powered operation?
The TMP1826DGKR incorporates an internal capacitor charged via SDQ that sustains operation during brief voltage dips. If VDD drops to 0V while bus-powered, the device continues functioning until the capacitor discharges below the brownout threshold (1.3V). Upon recovery, TMP1826DGKR performs a 2-ms power-on reset and resumes 1-Wire® communication without host reinitialization.
Can the four I/O pins on the TMP1826DGKR be used simultaneously as both inputs and outputs?
No - each of the four I/O pins (IO0–IO3) on the TMP1826DGKR is individually configurable as either input, output, or temperature alert, but not bi-directional in real time. Configuration is set via the IO configuration register stored in EEPROM, and changes require a write cycle. IO2 supports dedicated alert functionality with programmable high/low thresholds, while others serve general-purpose roles.
Is the 64-bit identification number of the TMP1826DGKR programmable by the user?
No, the 64-bit identification number of the TMP1826DGKR is factory-programmed, NIST-traceable, and permanently laser-fused during manufacturing. It cannot be altered, erased, or rewritten by the user. This ensures unambiguous device addressing on multi-drop 1-Wire® buses and provides immutable calibration lineage for regulated applications such as medical devices and aerospace systems.
TMP1826DGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -55°C ~ 150°C
- Sensing Temperature - Remote:
- -
- Output Type:
- 1-Wire®
- Voltage - Supply:
- 1.7V ~ 5.5V
- Resolution:
- 16 b
- Features:
- One-Shot, Shutdown Mode, Standby Mode
- Accuracy - Highest (Lowest):
- ±0.3°C (±0.5°C)
- Test Condition:
- -20°C ~ 85°C (-55°C ~ 150°C)
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-VSSOP
TMP1826DGKR FAQ
1.How can I place an order for TMP1826DGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP1826DGKR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMP1826DGKR reliable?
The price and inventory of TMP1826DGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP1826DGKR is usually 5 days.
3.What payment methods are accepted for TMP1826DGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP1826DGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP1826DGKR?
TMP1826DGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP1826DGKR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMP1826DGKR?
For technical support, including TMP1826DGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP1826DGKR requirements.
6.How does Aetrix verify that TMP1826DGKR is sourced from the original manufacturer or authorized distributors?
All TMP1826DGKR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMP1826DGKR meets industry standards.
7.What is the process for return or replacement of TMP1826DGKR?
All TMP1826DGKR units undergo pre-shipment inspection (PSI). If there is an issue with TMP1826DGKR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMP1826DGKR part is unused and in its original packaging.
Return procedure for TMP1826DGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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