Analog Devices Inc. LT1004CS8-2.5#PBF

LT1004CS8-2.5#PBF Micropower Voltage Reference General Description

The LT1004CS8-2.5#PBF from Analog Devices Inc. represents a robust and precise voltage reference solution tailored to meet the demands of modern low-power electronic systems. As part of the LT1004 series, this device integrates a shunt voltage reference architecture within an 8-lead SOIC package, offering a nominal output of 2.5V with tight initial accuracy. Designed using a bandgap reference topology, the LT1004CS8-2.5#PBF is engineered for consistency, reliability, and suitability for applications where stable voltage references are essential, especially where low power consumption and high accuracy are critical parameters.

Main Attributes and Performance Summary of LT1004CS8-2.5#PBF

The LT1004CS8-2.5#PBF distinguishes itself with several technical advantages. It guarantees an initial output accuracy of ±20mV (0.8% of 2.5V), ensuring dependable performance straight from the factory without additional trimming. With a low minimum operating current of just 10μA and the ability to operate reliably up to 20mA in shunt mode, the device is particularly well-matched for portable systems and battery-powered instrumentation.

Moreover, the device exhibits very low dynamic impedance, which translates into minimal output voltage variation under changing load conditions—key for precision analog systems. The LT1004CS8-2.5#PBF is also characterized by predictable temperature performance; its design ensures accurate operation across its specified temperature range, making it suitable for environments subject to temperature fluctuation.

For applications demanding enhanced temperature coefficient performance, the LT1004CS8-2.5#PBF is an upgrade over pin-compatible legacy solutions, such as the LM185/LM385 series.

Electrical Characteristics and Environmental Requirements for LT1004CS8-2.5#PBF

Understanding the technical boundaries and recommended usage conditions for the LT1004CS8-2.5#PBF is crucial for system reliability:

Output Voltage: Fixed at 2.5V

Output Accuracy: ±20mV at 25°C

Operating Current: 10μA minimum, up to 20mA maximum

Very Low Dynamic Impedance

Absolute Maximum Ratings:

- Reverse Breakdown Current: 30mA

- Forward Current: 10mA

- Storage Temperature: -65°C to +150°C

- Lead Temperature (Soldering, 10s): 300°C

Operating Temperature Ranges (Package Dependent):

- ‘C’ Grade: 0°C to +70°C

- Industrial (‘I’) and Military (‘M’) grades also available in the series for wider temperature ranges

Package Thermal Properties (S8):

- Junction-to-Ambient (θJA): 120°C/W

- Maximum Junction Temperature: 150°C

It’s important to avoid exceeding absolute maximum ratings to ensure device longevity and integrity, particularly in designs where voltage and current transients may occur.

Engineering Applications of LT1004CS8-2.5#PBF in Design Projects

The LT1004CS8-2.5#PBF’s combination of low power draw, tight accuracy, and steady temperature characteristics makes it ideal for a variety of precision and portable solutions. Key application areas include:

Portable meter and test instrument voltage references, ensuring consistent calibration regardless of battery status.

Battery-operated system modules, where minimal quiescent current expands device run-time.

Current loop instrumentation, where stable reference voltages directly impact measurement fidelity.

Thermocouple cold junction compensation circuits, providing a micropower and temperature-stable reference.

Low-noise analog front-ends, where reference stability minimizes drift and noise under varying loads or battery conditions.

Voltage regulator and supply reference circuits, safeguarding against supply fluctuations.

Lead acid low-battery detectors and similar battery monitor applications, capitalizing on the reference’s efficiency.

Available Package Types and Pinouts for LT1004CS8-2.5#PBF

For design flexibility and ease of integration into diverse form factors, the LT1004CS8-2.5#PBF is offered in several industry-standard packages. The S8 package (8-lead small outline plastic SOIC) caters to surface-mount assembly processes, providing ease of placement on dense PCBs and favorable thermal properties. Other members of the LT1004 series come in TO-46 (metal can) and TO-92 (plastic) packages, allowing for through-hole designs and custom layout needs. Pinouts differ by package to accommodate different board layouts and assembly methods. For the S8 (SOIC-8), recommended solder pad layouts and package dimensions are available to support reliable PCB integration.

Alternative or Substitute Models Comparable to LT1004CS8-2.5#PBF

When considering second sources or alternatives, engineers might look towards the LM185/LM385 series devices, which the LT1004 series was designed to replace in a pin-compatible and functionally superior manner. The key advantages of choosing the LT1004CS8-2.5#PBF involve finer initial accuracy and improved temperature performance compared to these legacy devices; however, they maintain similar form factors and drop-in compatibility for many designs. Within the Analog Devices and Linear Technology portfolios, designers may also evaluate the LT1034 for applications requiring guaranteed low temperature drift, as noted in the documentation. Careful review of performance specifications and pinout compatibility is recommended when substituting devices in existing designs.

Conclusion

: Implementing LT1004CS8-2.5#PBF for Reliable Voltage Reference Solutions

The LT1004CS8-2.5#PBF is a well-engineered micropower voltage reference that fulfills demanding requirements for precision, efficiency, and temperature stability in a diverse range of electronic systems. For product selection engineers and procurement professionals, its technical attributes, versatile packaging, and straightforward electrical behavior simplify both BoM management and design qualification. The LT1004CS8-2.5#PBF stands out particularly for low-power, battery-powered, and precision analog applications where reference accuracy is non-negotiable, ensuring lasting value in high reliability and cost-sensitive environments alike.