Overview
The LM385M3X-1.2/NOPB is a micropower 2-terminal band-gap voltage regulator diode produced by Texas Instruments. This device is part of the LM185-1.2, LM285-1.2, and LM385-1.2 series, known for their exceptionally low dynamic impedance and good temperature stability. The LM385M3X-1.2/NOPB operates over a wide current range of 10μA to 20mA, making it versatile for various reference applications. It features on-chip trimming to provide tight voltage tolerance and uses only transistors and resistors, resulting in low noise and good long-term stability.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Reference Voltage | 1.235V | Typical |
| Initial Tolerance | ±1% and ±2% | - |
| Operating Current Range | 10μA to 20mA | - |
| Dynamic Impedance | 1Ω | IR = 100μA |
| Temperature Coefficient | 30 ppm/°C (X Suffix), 50 ppm/°C (Y Suffix), 150 ppm/°C (All Others) | - |
| Operating Temperature Range | 0°C to 70°C | - |
| Storage Temperature Range | −55°C to +150°C | - |
| ESD Susceptibility | 2kV (Human Body Model) | - |
| Package Types | TO-92, SOIC, SOT-23 | - |
Key Features
- Low dynamic impedance of 1Ω
- Good temperature stability
- On-chip trimming for tight voltage tolerance
- Low noise and good long-term stability due to the use of transistors and resistors
- Exceptionally tolerant of capacitive loading
- Wide operating current range of 10μA to 20mA
- Low power drain, suitable for micropower circuitry
- Available in TO-92, SOIC, and SOT-23 packages
Applications
- Portable meters and regulators
- General purpose analog circuitry
- Micropower circuitry where low power consumption is critical
- Reference applications requiring tight voltage tolerance and low noise
- Battery-powered devices where long battery life is essential
Q & A
- What is the reference voltage of the LM385M3X-1.2/NOPB?
The reference voltage is 1.235V.
- What is the operating current range of the LM385M3X-1.2/NOPB?
The operating current range is from 10μA to 20mA.
- What are the available package types for the LM385M3X-1.2/NOPB?
The device is available in TO-92, SOIC, and SOT-23 packages.
- What is the temperature coefficient of the LM385M3X-1.2/NOPB?
The temperature coefficient is 30 ppm/°C (X Suffix), 50 ppm/°C (Y Suffix), and 150 ppm/°C (All Others).
- What is the ESD susceptibility of the LM385M3X-1.2/NOPB?
The ESD susceptibility is 2kV (Human Body Model).
- What are the typical applications of the LM385M3X-1.2/NOPB?
Typical applications include portable meters, regulators, general purpose analog circuitry, and micropower circuitry.
- How does the LM385M3X-1.2/NOPB handle capacitive loading?
The device is exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application.
- What is the dynamic impedance of the LM385M3X-1.2/NOPB?
The dynamic impedance is 1Ω.
- What is the storage temperature range for the LM385M3X-1.2/NOPB?
The storage temperature range is −55°C to +150°C.
- How does the LM385M3X-1.2/NOPB contribute to battery life in portable devices?
The extremely low power drain of the device helps in achieving battery life approaching shelf life in portable devices.
