会社ブログについて Supply Microchip Voltage References:Low-Cost/High-Accuracy/High-Reliability Voltage Reference

Supply Microchip Voltage References:Low-Cost/High-Accuracy/High-Reliability Voltage Reference

Shenzhen Mingjiada Electronics Co., Ltd. is a globally renowned authorised independent distributor of electronic components. With a stock of over 2 million SKUs, a genuine product guarantee and efficient delivery capabilities, we provide electronic component supply services to customers in the electronics industry. We balance cost-effectiveness with technical compatibility to help our customers accelerate product development and mass production processes.

Supply Advantages

1. Genuine Products, Reliable Quality: All products are sourced directly from original manufacturers. We maintain strict control over our procurement channels, and every chip undergoes rigorous quality testing. We strictly prohibit the use of refurbished or loose new components to ensure the stable operation of our customers’ products, giving you complete peace of mind.

2. Ample Stock and Prompt Dispatch: Drawing on extensive stock resources and a well-established supply chain system, Mingjiada Electronics maintains stock of the full range of product models. Whether for small-batch sample purchases or large-scale mass production orders, we respond swiftly and dispatch promptly to meet urgent production requirements, thereby shortening product R&D and mass production cycles.

3. Excellent Value for Money and Comprehensive Services: Drawing on many years of industry experience and strong procurement capabilities, we offer our customers highly competitive prices. Furthermore, we have a professional technical support team that provides one-stop services, including product selection, technical consultancy and after-sales support, to assist customers in resolving various issues during the selection and application processes.

Microchip voltage references are based on a proven bandgap reference architecture, covering diverse applications such as consumer electronics, industrial data acquisition, automotive electronics and automation equipment, and providing a stable reference potential for ADCs/DACs, power monitoring and sensor signal conditioning.

I. Low-Cost Voltage References

Representative Models: MCP1525, MCP1541

The MCP1525 (2.5 V) and MCP1541 (4.096 V) are Microchip’s entry-level bandgap voltage references, designed to offer excellent value for money. Utilising CMOS technology and EPROM calibration, they are ideal for cost-sensitive analogue acquisition designs.

- Key features: Initial accuracy of ±1 per cent, maximum temperature drift of 50 ppm/°C, low quiescent current, simplified peripheral circuitry, and stable operation requiring only a small number of supporting capacitors; utilises the compact SOT-23 package, which minimises PCB footprint and reduces the overall BOM cost.

- Suitable Applications: Small household appliances, portable consumer devices, simple battery monitoring, entry-level ADC sampling, and IoT sensor nodes; projects requiring moderate voltage accuracy where controlling material costs is a priority.

- Solution Highlights: No complex external calibration required; stable supply; simple pin configuration; rapid analogue signal chain assembly.

II. High-Precision Voltage References

Representative Model: MCP1502

The MCP1502 is a high-performance, precision series-connected voltage reference from Microchip, offering multiple fixed output levels ranging from 1.024 V to 5 V, and is specifically designed for high-precision analogue-to-digital conversion applications.

- Key Features: Initial accuracy of up to 0.1 per cent; maximum temperature drift as low as 7 ppm/°C; low-noise output; excellent power supply regulation and load regulation, minimising reference voltage drift caused by power supply fluctuations; built-in buffering capability to directly drive high-resolution ADCs, reducing signal chain errors.

- Applications: Industrial data acquisition, precision weighing instruments, test and measurement equipment, reference sources for 24-bit Δ-Σ ADCs, and signal acquisition for automated equipment.

- Solution Highlights: Low temperature drift and low noise significantly reduce system measurement errors, meeting the stringent requirements of precision measurement systems for reference potentials and minimising the workload associated with subsequent system calibration.

III. High-Reliability Voltage References

Representative Model: MCP1501 Series

The MCP1501 Series features enhanced environmental resilience, offering wide-temperature versions that support a wide input voltage range. It is resistant to vibration and temperature cycling, and possesses excellent long-term stability, making it ideal for system designs requiring long service life and operation in harsh conditions.

- Key Features: Multiple voltage options available; initial accuracy of 0.1 per cent; selectable temperature drift specifications; wide operating temperature range; low long-term drift; strong resistance to electromagnetic interference; certain models support automotive-grade specifications and withstand sudden temperature changes and power surges.

- Applications: Automotive electronics, industrial control modules, outdoor monitoring terminals; designed for systems operating in harsh environments—such as automotive ADAS applications and industrial on-site monitoring—where long-term stability and zero drift are required.

- Solution Highlights: Maintains stable reference voltage in harsh environments, reduces on-site failure rates, is suitable for long-life equipment, and lowers maintenance costs throughout the product lifecycle.

Selection Summary

1. Cost-priority, standard data acquisition: Select the MCP1525/MCP1541 low-cost voltage references to balance basic performance with BOM budget;

2. Precision measurement, high-resolution ADCs: Select the MCP1502 high-precision voltage reference to achieve high-precision signal acquisition through ultra-low temperature drift;

3. Harsh operating conditions and long-life equipment: Select the MCP1501 high-reliability voltage reference, suitable for industrial, automotive and other wide-temperature scenarios with high levels of interference.

Microchip’s comprehensive voltage reference portfolio can be combined with its own PIC microcontrollers and high-precision ADCs/DACs to form complete analogue signal chain solutions, providing a one-stop solution for reference voltage design requirements ranging from consumer products to industrial and automotive applications.