LTC6652AHMS8-2.048#PBF

Overview

The LTC6652AHMS8-2.048#PBF is a precision buffered voltage reference with a fixed output of 2.048V, housed in an 8-lead MSOP package. It features high accuracy of ±0.05% and low temperature drift of 5ppm/°C. The device operates over a –40°C to +125°C range with a supply voltage up to 13.2V. It provides ±5mA source/sink current capability, low noise of 2.1ppm P-P (0.1Hz to 10Hz), and includes a shutdown mode consuming less than 2µA.

Feature Summary

• High-order curvature compensation ensures predictable temperature characteristics and minimal drift across the operating range.
• Capable of sourcing and sinking up to 5mA without requiring an external load capacitor for stability.
• Includes a low-power shutdown mode that reduces consumption below 2µA when the device is inactive.

Applications

• Automotive control and monitoring systems
• High-resolution data acquisition systems
• Medical equipment instrumentation

Procurement Notes

Verify the specific A-grade performance parameters against the official datasheet before integration. Confirm the MSOP-8 package dimensions match the PCB footprint requirements. Ensure the supply voltage remains within the specified limits to maintain line regulation and thermal stability during operation.

Selection Notes

Select this component for applications demanding high initial accuracy and low drift over wide temperature variations. The buffered output simplifies circuit design by eliminating the need for external amplifiers. Consider the shutdown feature for battery-powered designs where minimizing quiescent current is critical.

Part Context

This part belongs to the LTC6652 family of precision references, which are fully specified from –40°C to +125°C. The family offers various output voltages including 1.25V, 2.048V, 2.5V, 3V, 3.3V, 4.096V, and 5V. The A-grade variant provides superior accuracy and drift specifications compared to the B-grade options.

Replacement Considerations

LTC6652BHMS8-2.048#PBF: Offers identical functionality with B-grade specifications (±0.1% accuracy, 10ppm/°C drift).

FAQ

Is an external output capacitor required for the LTC6652AHMS8-2.048?

No, the device is stable without an external load capacitor. However, adding a capacitor between 0.1µF and 10µF can be beneficial for specific load conditions or transient response improvements.

How does the shutdown pin affect the output voltage?

When the SHDN pin is tied low, the device enters shutdown mode. The output impedance becomes approximately 20kΩ multiplied by the rated output voltage, resulting in a high-impedance state.