1. Device Overview & Purpose

️· What they are: AMS236 and AMS336 are precision 2.5V voltage references. They are used as a stable and accurate voltage source for various applications.
️· Key Features: They offer low temperature coefficients, wide input voltage ranges, and options for trimming. The datasheets emphasize their suitability for applications requiring a stable 2.5V output.

2. Electrical Characteristics – Key Parameters

️· Reference Voltage: 2.5V (nominal)
️· Input Voltage Range: (Not explicitly stated in all sections but implied as being wide).
️· Temperature Stability: Crucially important.
- AMS236: Guaranteed by design, with design limits not used for outgoing quality. Average temperature coefficient is monitored.
- AMS336: A temperature stability specification is included (1.8 mV from 0°C to 70°C).
️· Dynamic Impedance (f = 100Hz): Around 0.2 to 1.0 ohms (varies between AMS236/336 and variants within).
️· Reverse Breakdown Voltage & Current: These characteristics are specified, important for understanding the device's behavior under stress.
️· Long Term Stability: Both devices have a 20 ppm long-term stability specification.

3. Typical Performance Characteristics

️· Reverse Voltage Change vs. Temperature: Graphs illustrate how the reference voltage changes with temperature.
️· Reverse Voltage Change vs. Reverse Voltage: Illustrates the behavior under reverse bias.
️· Reverse Current vs. Voltage: Illustrates how reverse current changes with reverse voltage.

4. Application Circuits

The datasheet provides several typical application circuits, including:

️· 2.5V Reference: Basic use.
️· Wide Input Range Reference: Using the reference with a wider input voltage range.
️· 2.5V Reference with Minimum Temperature Coefficient: Employing a silicon diode to reduce temperature effects.
️· Precision Power Regulator with Low Temperature Coefficient: Application in a power regulation circuit.
️· Trimmed 2.5V Reference with Temperature Coefficient Independent of Breakdown Voltage: Circuit to minimize temperature effects.

5. Package Information

️· TO-92: For AMS236
️· SOIC (8-lead): For AMS336
️· Package dimensions are provided with tolerances.
️· Notes regarding mold and interlead flash are important for assembly.

Important Notes/Cautions

️· Absolute Maximum Ratings: Do *not* exceed these values.
️· Thermal Resistance: The datasheet provides junction-to-ambient thermal resistance values, critical for thermal management and preventing overheating.
️· Temperature Effects: The datasheet stresses the importance of considering temperature effects and provides application circuits to mitigate them.
️· Long-Term Stability: The datasheet mentions long-term stability – a key parameter for systems requiring voltage reference accuracy over extended periods.
️· Design Limits: The AMS236 temperature stability is guaranteed by design, not by production testing.

This is a comprehensive summary. Do you have any specific questions about a particular aspect of these voltage references or the datasheet?