Overview
The LM385Z-2.5, produced by National Semiconductor, is a micropower 2-terminal band-gap voltage regulator diode. This device is designed to operate over a wide current range, making it versatile for various applications. It features exceptionally low dynamic impedance and good temperature stability, which are achieved through on-chip trimming. The LM385Z-2.5 is particularly useful in micropower circuitry due to its extremely low power drain, making it suitable for battery-powered devices with long battery life.
Key Specifications
| Parameter | Conditions | Typical | Minimum | Maximum | Units |
|---|---|---|---|---|---|
| Reverse Breakdown Voltage | TA = 25°C, 20 µA ≤ IR ≤ 20 mA | 2.500 | 2.462 | 2.538 | V |
| Minimum Operating Current | 13 | 30 | µA | ||
| Dynamic Impedance | IR = 100 µA | 0.6 | Ω | ||
| Average Temperature Coefficient | 20 µA ≤ IR ≤ 20 mA, TA = Tlow to Thigh | 80 | ppm/°C | ||
| Operating Temperature Range | 0°C | 70°C | °C | ||
| Storage Temperature Range | -55°C | 150°C | °C |
Key Features
- Operating current range from 20 µA to 20 mA
- Low dynamic impedance of 0.6 Ω (A grade)
- Low temperature coefficient of 80 ppm/°C
- Low voltage reference of 2.5V with tight voltage tolerance (±20 mV or ±0.8% max. initial tolerance for A grade)
- Exceptionally tolerant of capacitive loading
- Pb-free and RoHS compliant
- Available in various packages including TO-92, TO-46, SOIC, and SOT-23
Applications
- Micropower circuitry, including portable meters and regulators
- General purpose analog circuitry with battery life approaching shelf life
- Precision current sources (1 µA to 1 mA)
- Micropower thermocouple cold junction compensators
- Thermometers (e.g., 0°C–100°C and 0°F–50°F)
Q & A
- What is the operating current range of the LM385Z-2.5?
The operating current range is from 20 µA to 20 mA.
- What is the typical dynamic impedance of the LM385Z-2.5?
The typical dynamic impedance is 0.6 Ω (A grade).
- What is the temperature coefficient of the LM385Z-2.5?
The average temperature coefficient is 80 ppm/°C.
- What is the voltage reference provided by the LM385Z-2.5?
The voltage reference is 2.5V with a tight voltage tolerance (±20 mV or ±0.8% max. initial tolerance for A grade).
- What are the available packages for the LM385Z-2.5?
The device is available in TO-92, TO-46, SOIC, and SOT-23 packages.
- Is the LM385Z-2.5 Pb-free and RoHS compliant?
Yes, the device is Pb-free and RoHS compliant.
- What are some common applications of the LM385Z-2.5?
Common applications include micropower circuitry, portable meters, regulators, precision current sources, and thermocouple cold junction compensators.
- What is the operating temperature range of the LM385Z-2.5?
The operating temperature range is from 0°C to 70°C.
- What is the storage temperature range of the LM385Z-2.5?
The storage temperature range is from -55°C to 150°C.
- How does the LM385Z-2.5 handle capacitive loading?
The device is exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application.
