TDP16035002AUF: Detailed Technical Analysis - Accuracy, Load and Thermal Characteristics
🚀 Key Takeaways
- 0.05% Accuracy: Reduces systemic measurement error by 10 times compared to standard resistors.
- Channel Matching: Guarantees identical divider legs for precision ADCs.
- Thermal Stability: Integrated design minimizes drift between elements to a minimum.
- Space Saving: Replaces 8 pairs of precision resistors, reducing PCB area by 35%.
The introduction provides a data-driven overview of the parameters and verifiable characteristics of TDP16035002AUF, oriented toward engineers and laboratory specialists. It describes measurements and typical lab tests to evaluate the 0.05% accuracy and the influence of circuit conditions on stability.
1 — Overview and Key Characteristics of TDP16035002AUF
The key functional block of TDP16035002AUF is a resistor array for dividers, bridges, and input networks. Practical benefit: using a single die instead of discrete components ensures that all resistors heat up and cool down identically, eliminating bridge imbalance when ambient temperature changes.
| Parameter | TDP16035002AUF | Typical Discrete (0.1%) | Advantage |
|---|---|---|---|
| Accuracy (Tolerance) | 0.05% | 0.1% - 1.0% | 2-20 times higher |
| Tracking TCR | < 5 ppm/°C | 25-50 ppm/°C | 5 times better stability |
| PCB Area | 1 package (DIP-16) | 16 packages | -70% PCB space |
1.1 — Purpose and Typical Application
The array is designed for matching ADC input networks. Result for the engineer: at a nominal value of 50 kΩ, matching between pairs allows achieving a common-mode rejection ratio (CMRR) at a level unattainable for ordinary assemblies.
👨💻 Expert Opinion: Alexander Sokolov, Lead Design Engineer
"When working with TDP16035002AUF, it's important to understand that 0.05% accuracy is easily 'killed' by incorrect flux. Residual resistance from PCB contamination is comparable to the tolerance of a 50kΩ resistor. Ultrasonic cleaning after assembly is mandatory."
2 — Accuracy and Stability: 0.05% Tolerance
The 0.05% accuracy in TDP16035002AUF is not just a number in a datasheet, but a guarantee of a minimal dynamic error range. For a system with a 16-bit ADC, this means the resistor error will stay within the least significant bits (LSB), which is critical for medical and metrological equipment.
(Schematic representation of a bridge circuit, not an exact drawing)
3 — Load and Thermal Characteristics
3.1 — Self-heating and Its Impact
At a current of 1 mA, a 50kΩ resistor dissipates 50 mW. For TDP16035002AUF, this leads to a local temperature rise. Engineering Hack: Place the array in an area with minimal airflow or under a protective shield to avoid accuracy fluctuations from random drafts (thermocouple effect).
- Do not use the array at its power limit (P_max) — this increases drift by 3-4 times.
- Avoid manual soldering with an overheated tip; use the thermal profile recommended for thin-film structures.
4 — Practical Circuit Tips
To achieve the rated accuracy of 0.05%, software "zero" and "span" correction is recommended. However, TDP16035002AUF minimizes the need for frequent recalibration, as its long-term stability is less than 0.01% over 1000 hours of operation.
5 — Laboratory Testing
During verification, use a multimeter of no less than 6.5-digit class (e.g., Keysight 34465A). Methodology: measurement is performed in 4-wire mode after a 30-minute warm-up of the instrument and the board under test.
Conclusion
- TDP16035002AUF is an industrial standard for high-precision data acquisition.
- Integration of 16 resistors into one DIP package reduces system "thermal noise."
- 0.05% accuracy requires PCB cleanliness and proper thermal management.
Frequently Asked Questions (FAQ)
What does TDP16035002AUF mean and where to apply it?
This is a thin-film resistor array in a 16-pin package. It is ideal for measurement systems requiring high consistency of divider legs (e.g., in weighing terminals or battery monitoring systems).
What tests will confirm 0.05% accuracy?
Key tests include TCR (temperature coefficient) and measurement of relative resistance deviation within the group. If one resistor shifts by +0.01% and the neighboring one by +0.01%, the divider accuracy remains perfect.
What layout errors most often violate stability?
Close proximity to power transistors or switching regulators. Thermal waves across the board create a temperature gradient on the TDP1603 package, causing a resistance difference between the outer pins.
