Overview
The LM385BLP-1.2 is a micropower, two-terminal, band-gap voltage reference produced by Texas Instruments. This device operates over a wide current range of 15 μA to 20 mA and features exceptionally low dynamic impedance and good temperature stability. On-chip trimming ensures tight voltage tolerance, and the band-gap reference exhibits low noise and long-term stability. The design of the LM385BLP-1.2 makes it highly tolerant of capacitive loading, making it easier to use in various reference applications. The device is particularly useful for micropower circuitry due to its very low power consumption, making it suitable for battery-operated systems and general-purpose analog circuitry.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Current Range | 15 μA to 20 mA | |
| Reference Voltage | 1.235 V (nominal) | V |
| Voltage Tolerance | 1% and 2% | |
| Reference Impedance | 1 Ω MAX at 25°C, 1.5 Ω MAX over full temperature range | Ω |
| Operating Temperature Range | 0 to 70 °C | °C |
| Package Type | TO-92 (LP) | |
| Minimum Reference Current | 15 μA | μA |
| Broadband Noise Voltage | 60 μV (10 Hz to 10 kHz) | μV |
Key Features
- Operating current range of 15 μA to 20 mA
- 1% and 2% initial voltage tolerance
- Low dynamic impedance (1 Ω MAX at 25°C, 1.5 Ω MAX over full temperature range)
- Very low power consumption
- Interchangeable with industry standard LM285-1.2 and LM385-1.2
- Low noise and long-term stability
- Exceptional tolerance to capacitive loading
- Suitable for micropower circuitry and battery-operated systems
Applications
- Portable meters and test instruments
- Battery-operated systems
- Current-loop instrumentation
- Panel meters
- General-purpose analog circuitry
- Regulators and power supplies
- Current-sensing circuits
Q & A
- What is the operating current range of the LM385BLP-1.2?
The operating current range is 15 μA to 20 mA.
- What is the nominal reference voltage of the LM385BLP-1.2?
The nominal reference voltage is 1.235 V.
- What are the available voltage tolerances for the LM385BLP-1.2?
The available voltage tolerances are 1% and 2%.
- What is the maximum reference impedance of the LM385BLP-1.2 at 25°C?
The maximum reference impedance at 25°C is 1 Ω.
- What is the operating temperature range of the LM385BLP-1.2?
The operating temperature range is 0 to 70 °C.
- What package type is the LM385BLP-1.2 available in?
The LM385BLP-1.2 is available in the TO-92 (LP) package.
- What is the minimum reference current required for the LM385BLP-1.2?
The minimum reference current is 15 μA.
- How does the LM385BLP-1.2 handle capacitive loading?
The device is exceptionally tolerant of capacitive loading, making it easier to use in most reference applications.
- What are some common applications of the LM385BLP-1.2?
Common applications include portable meters, battery-operated systems, current-loop instrumentation, panel meters, and general-purpose analog circuitry.
- Is the LM385BLP-1.2 suitable for micropower circuitry?
Yes, the LM385BLP-1.2 is highly suitable for micropower circuitry due to its very low power consumption.
