LM385BZ-1.2G ON Semiconductor Integrated Circuit (Other) In Stock
ON Semiconductor LM385BZ-1.2G is a 1.235V precision voltage reference IC in a 3-pin TO-92 package. This two-terminal shunt regulator delivers ultra-low noise output (typ. 50µV RMS) and low temperature drift for precision analog circuits. Widely stocked globally with fast shipping from authorized distributors, making it ideal for battery monitoring, precision biasing, and measurement applications.
- Manufacturer
- ON Semiconductor
- Package
- Other
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- LM385BZ-1.2G Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2761(MOQ 185)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-precise 1.235V reference output with ±0.65% accuracy for 8-16 bit DAC/ADC biasing
- Extremely low noise <50µV RMS enables clean analog front-end performance
- Wide 10mA to 15mA operating current suits precision measurement instruments
- Lead-free ROHS O-PBCY-T3 package rated for industrial temperature range
Applications
The LM385BZ-1.2G is fundamental for precision battery voltage monitoring in rechargeable power tools and portable medical devices requiring stable 1.2V reference. Its low noise output suits high-resolution ADC reference networks in industrial data acquisition and laboratory instrumentation. Additionally, the compact TO-92 package fits retrofit applications in legacy analog circuit upgrades where space and thermal constraints are moderate.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | 29-10 |
| YTEOL | 0 |
| Analog IC - Other Type | TWO TERMINAL VOLTAGE REFERENCE |
| JESD-30 Code | O-PBCY-T3 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Voltage-Max | 1.247V |
| Output Voltage-Min | 1.223V |
| Output Voltage-Nom | 1.235V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SIP3,.1,50 |
| Package Shape | ROUND |
| Package Style | CYLINDRICAL |
| Qualification Status | Not Qualified |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | MATTE TIN |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 1.27mm |
| Terminal Position | BOTTOM |
| Trim/Adjustable Output | NO |
| Voltage Tolerance-Max | 2% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does LM385BZ-1.2G provide ultra-low noise <50µV RMS for audio and sensor applications?
LM385BZ-1.2G delivers <50µV RMS noise (typ. 20µV-50µV at 10kHz bandwidth) via precision laser-trimmed internal resistor networks and current-source stabilization. This 10-20x lower noise versus standard 7805 regulators enables direct use as audio line-level reference or low-noise biasing for 16-bit ADCs without additional filtering. Measuring 1.235V ±0.65%, the reference suits analog multiplexer switching and precision log amplifiers.
What is the minimum and maximum operating current for LM385BZ-1.2G in 12V battery systems?
LM385BZ-1.2G operates in 10mA to 15mA current range, with dynamic impedance <5Ω ensuring stable 1.235V output across load variations. At 10mA minimum, the series resistor calculates to (12V - 1.235V) / 10mA ≈ 1.08kΩ, dissipating ~110mW. At 15mA maximum, resistor value drops to ~720Ω and dissipation rises to ~165mW, suitable for continuous operation in battery-powered measurement systems.
Can LM385BZ-1.2G replace industry-standard LM335 temperature sensors?
LM385BZ-1.2G is a fixed voltage reference (1.235V), distinct from LM335 which is a temperature-dependent sensor (10mV/°K). LM385 suits DC biasing, DAC references, and precision trigger networks, while LM335 measures temperature. For precision battery fuel-gauge circuits requiring both voltage reference and temperature compensation, using LM385BZ-1.2G (1.235V) plus an LM335 (temp sense) together is standard practice.
What package format does LM385BZ-1.2G use and how does it compare to surface-mount alternatives?
LM385BZ-1.2G is packaged in 3-pin TO-92 plastic (O-PBCY-T3 code), measuring ~5mm × 4mm height. Surface-mount alternatives include LM385M (8-pin SOIC) and LM385BD (5-pin SOT-23), offering denser PCB layouts. However, TO-92 suits breadboard prototyping and retrofit into legacy analog boards where solder-in-place connections are preferred. Lead-free status ensures compatibility with modern assembly processes.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 185+ | $1.1030 | $204.06 |
| 235+ | $1.0662 | $250.56 |
| 315+ | $0.9559 | $301.11 |
| 2000+ | $0.2761 | $552.22 |
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