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Product Detailed Parameters
- Description：IC VREF SHUNT 2% 1.2V TO92-3
- Series：-
- Mfr：TAEJIN
- Package：Bulk
- Output Type：Fixed
- Voltage - Output (Min/Fixed)：1.235V
- Voltage - Output (Max)：-
- Current - Output：20 mA
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92
- Grade：-
- Qualification：-
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Overview
The LM385-1.2 is a two-terminal, bipolar bandgap voltage reference designed to provide a stable 1.235V output. It operates within a wide current range of 10µA to 20mA, ensuring precision performance with low dynamic impedance and low noise. The device features tight initial accuracy tolerances and a low temperature coefficient, typically around 20 ppm/°C. It is available in various packages including TO-92 and surface-mount options, suitable for micro-power applications requiring extended battery life.
Feature Summary
- Two-terminal shunt voltage reference architecture
- Low power consumption suitable for battery-operated devices
- Stable operation across a wide current range
- Low dynamic impedance and noise characteristics
Applications
- Precision current sources
- Portable instrumentation
- Power management circuits
- Analog signal conditioning
Procurement Notes
Verify the specific manufacturer source, as TAEJIN may distribute components originally manufactured by Texas Instruments or Microchip. Confirm package type (e.g., TO-92 vs. SOT-23) and tolerance grade (standard vs. B-grade) against project requirements. Ensure datasheet specifications match the exact suffix codes for temperature range and accuracy.
Selection Notes
Select based on required accuracy grade; 'B' suffix variants offer tighter tolerances than standard versions. Consider package constraints, as through-hole TO-92 differs from surface-mount alternatives. Verify operating current stays within the 10µA–20mA window for optimal regulation. Check thermal stability requirements against the typical 20 ppm/°C coefficient.
Part Context
The LM385 series is a widely used family of micropower shunt voltage references. The -1.2 variant specifically targets applications needing a 1.235V reference. It serves as a cost-effective alternative to more complex regulator ICs, offering high precision in a simple two-terminal package format common in analog circuit design.
Replacement Considerations
LM385BZ-1.2/NOPB (Texas Instruments)
FAQ
What is the minimum operating current for the LM385-1.2?
The device requires a minimum cathode current of approximately 10µA to maintain regulation and specified accuracy.
How does the temperature coefficient affect the output voltage?
The typical temperature coefficient is 20 ppm/°C. For the 1.2V model, this is generally negative, meaning output voltage decreases slightly as temperature increases.
