一、产品概述（Product Overview）
The ETR0805 is a high-performance thin film precision chip resistor belonging to the ETR series, featuring a standard EIA 0805 package. Adopting advanced NiCr thin film construction, this resistor is meticulously engineered to deliver exceptional precision, low noise operation, and reliable performance across a wide range of applications. With a power rating of 1/10W (0.10W) at 70°C and compliance with lead-free soldering requirements, it is perfectly suited for modern electronic manufacturing processes. Whether used in industrial control systems, precision measurement equipment, communication devices, or consumer electronics, the ETR0805 consistently meets the stringent demands of high-precision circuit design.
二、Core Performance Parameters
（一）（Electrical Performance）
- Resistance Range: The resistance value spans from 1.0Ω to 2MΩ, covering a wide spectrum of application requirements. It supports E-24, E-96, and E-192 standard resistance values, providing abundant options for circuit design.
- Resistance Tolerance: Offers multiple precision grades, including ±0.01% (T), ±0.05% (A), ±0.1% (B), ±0.25% (C), ±0.5% (D), and ±1% (F). This enables precise current sensing and signal processing in high-precision circuits.
- Temperature Coefficient (TCR): Features excellent temperature stability with TCR options of ±2ppm/°C (X), ±3ppm/°C (O), ±5ppm/°C (S), ±10ppm/°C (B), ±15ppm/°C (N), ±25ppm/°C (C), and ±50ppm/°C (D). It minimizes resistance drift caused by temperature fluctuations, ensuring consistent performance in extreme temperature environments.
- Voltage Ratings: The maximum working voltage is 100V, and the maximum overload voltage is calculated based on the lower value between the specified overload voltage and 2×√(Power Rating × Resistance), guaranteeing safe operation under transient voltage conditions.
- Noise Characteristics: Exhibits outstanding low-noise performance. For resistance values ranging from 100Ω to 4.99KΩ, the noise level is as low as -100dB; for 20KΩ to 1MΩ, the noise level maintains at -100dB, effectively reducing signal interference in sensitive circuits.
（二）Physical and Environmental Characteristics
- Dimensions: The package dimensions are 2.00±0.15mm (length) × 1.25±0.15mm (width) × 0.55±0.10mm (height), with terminal dimensions of T=0.30±0.20mm and t=0.40±0.25mm, ensuring compatibility with standard PCB layout designs.
- Operating Temperature Range: Operates reliably within a temperature range of -55°C to +155°C. When the temperature exceeds 70°C, the power rating is derated in accordance with the power derating curve, adapting to harsh operating environments.
- Environmental Reliability: Undergoes rigorous environmental tests, including thermal shock (100 cycles of -55°C to +150°C), load life (1000-1048 hours at 70°C with rated voltage), and steady-state humidity (1000-1048 hours at 40°C and 90%-95% RH). The resistance change rate (∆R) is within ±0.05% for high-precision grades and ±0.5% for standard grades, demonstrating excellent durability and stability.
- Mechanical Strength: Features strong bending resistance. With a bending amplitude of 3mm for 10 seconds, the resistance change is within ±0.05% (high-precision grades) and ±0.2% (standard grades), ensuring structural integrity during PCB assembly and use.
三、Product Advantages
- Superior Precision: With tolerance as tight as ±0.01% and TCR as low as ±2ppm/°C, it outperforms traditional resistors in precision, making it ideal for high-precision current sensing and signal conditioning applications.
- Low Noise Operation: The NiCr thin film construction inherently reduces noise generation, ensuring clear signal transmission in audio equipment, sensor circuits, and other noise-sensitive systems.
- Wide Application Adaptability: Combines a broad resistance range, stable voltage tolerance, and extreme temperature resistance, suitable for diverse fields such as industrial automation, medical devices, automotive electronics, and aerospace.
- Lead-Free and Environmentally Friendly: Features a lead-free terminal finish, complying with RoHS standards, and meets the environmental requirements of modern electronic products.
- Reliable Packaging: Available in tape and reel packaging, with 5000 pieces per reel, facilitating automated SMT assembly and improving production efficiency while ensuring product protection during transportation and storage.
四、Application Scenarios
The ETR0805 is widely used in scenarios requiring high-precision current sensing and signal processing, including but not limited to:
- Industrial Control Systems: Current detection in PLCs, frequency converters, and servo drives, ensuring precise control of equipment operation.
- Precision Measurement Instruments: Signal conditioning in multimeters, oscilloscopes, and data acquisition systems, improving measurement accuracy.
- Communication Equipment: Signal processing in base stations, routers, and optical transceivers, maintaining stable signal transmission.
- Medical Devices: Current regulation in monitors, diagnostic equipment, and therapeutic instruments, ensuring device safety and reliability.
- Automotive Electronics: Sensor circuits, battery management systems (BMS), and electronic control units (ECUs) in new energy vehicles and traditional automobiles, adapting to harsh automotive operating environments.
五、Conclusion
As a high-performance thin film precision chip resistor, the ETR0805 stands out with its exceptional precision, low noise, and reliable environmental adaptability. It addresses the core demands of high-precision circuit design for accuracy, stability, and environmental friendliness, providing strong support for the upgrading and innovation of electronic products in various fields. Whether in industrial automation, medical technology, or automotive electronics, the ETR0805 is a trustworthy choice for engineers, contributing to the development of more efficient, precise, and reliable electronic systems.
