LM199H
The LM199H is a precision temperature-stabilized voltage reference IC featuring ultra-low temperature coefficient and excellent long-term stability for high-accuracy measurement systems
Quick Answer: LM199H is a precision temperature-stabilized voltage reference device originally developed by National Semiconductor and now supported by Texas Instruments / Analog Devices legacy product lines.
- Manufacturer
- Texas Instruments
- Product Category
- Voltage Regulators & Voltage Controllers
- Package
- CAN4
- Stock
- 1,500 pcs
- Availability
- Current quantity subject to confirmation.
Product Attributes
| Manufacturer | Texas Instruments |
|---|---|
| Product Category | Voltage Regulators & Voltage Controllers |
| Applications | Precision Voltage Standards, Digital Voltmeters, Calibration Equipment, Data Converters |
| Device Type | Precision Voltage Reference |
| Dynamic Impedance | 1 Ω Max |
| Heater Element | Integrated Temperature Stabilizer |
| Initial Voltage Tolerance | ±2% |
| Input Voltage Range | Wide Operating Range |
| Mounting Type | Through Hole |
| Noise Voltage | 20 µVRMS Max |
| Operating Current Range | 0.5 mA to 10 mA |
| Operating Temperature Range | -55°C to +125°C |
| Output Current | Up to 10 mA |
| Output Type | Shunt Voltage Reference |
| Package Pins | 4 Pins |
| Package Type | TO-46 Metal Can |
| Product status | Obsolete / Legacy Device |
| Reference Stability | High Long-Term Stability |
| Reference Voltage | 6.95 V Typical |
| RoHS Status | Not RoHS Compliant (Original Military/Industrial Package) |
| Technology | Monolithic Bipolar IC |
| Temperature Coefficient | 0.5 ppm/°C Typical |
| Datasheet | View Datasheet PDF |
Procurement Snapshot
Key supply and purchasing information for LM199H.
Why Source from Antrex Electronics?
Independent distribution support for verified sourcing, inspection and international procurement requirements.
Independent Distribution Support
Shortage, obsolete and hard-to-find component sourcing for production and procurement requirements.
Traceability Review
Label, lot, date code and available supply-chain documentation can be reviewed before order confirmation.
Inspection & Testing
Visual inspection, X-ray and third-party testing support can be arranged when required.
Global Procurement Support
Support for OEM, EMS, distributors and international sourcing requirements across individual parts and BOM projects.
Credentials & Verification Support
Quality controls, traceability review and inspection support for electronic component sourcing.
Detailed Description for LM199H
Product Overview
LM199H is a precision temperature-stabilized voltage reference device originally developed by National Semiconductor and now supported by Texas Instruments / Analog Devices legacy product lines. It provides a highly stable 6.95V shunt voltage reference using an integrated heater and buried Zener structure, achieving excellent temperature coefficient performance and long-term stability. The device is designed for precision measurement equipment, calibration systems, high-accuracy data converters, laboratory instruments and industrial control applications requiring ultra-stable voltage references.
Key Features
Manufacturer: National Semiconductor / Texas Instruments / Analog Devices legacy product
Part Number: LM199H
Device Type: Precision temperature-stabilized voltage reference
Product Category: Analog IC / Voltage Reference
Reference Voltage: 6.95V nominal
Reference Type: Shunt voltage reference
Temperature Coefficient: Extremely low temperature drift, approximately 0.0001%/°C class
Initial Voltage Tolerance: ±2% class
Dynamic Impedance: Approximately 0.5Ω maximum
Operating Current Range: 500μA to 10mA
Low Noise Voltage Reference Design
Integrated Heater Stabilization Circuit
Excellent Long-Term Voltage Stability
Fast Thermal Stabilization Performance
Operating Temperature Range: -55°C to +125°C
Package Type: Hermetic TO-46 metal can package with thermal shield
Mounting Type: Through-hole mounting
Qualification Level: Military / high-reliability applications
Application Feature: Precision voltage standard and calibration reference
Typical Applications: Digital voltmeters, calibration equipment, precision power supplies, laboratory instruments and high-resolution ADC/DAC systems
Applications
LM199H is designed for applications requiring extremely stable voltage references under changing temperature conditions. Typical applications include precision multimeters, calibration instruments, laboratory measurement equipment, precision current sources, high-resolution analog-to-digital converters, digital-to-analog converter references, industrial monitoring systems, aerospace electronics and military-grade electronic equipment.
Quality & Sourcing
Antrex Electronics can support LM199H sourcing with availability verification, manufacturer confirmation, date code inspection, package evaluation and quotation services. For precision measurement, aerospace or military applications, customers can provide screening requirements, inspection standards, quantity and delivery schedule for sourcing assistance.
Datasheet Download
LM199H / LM199 Precision Reference Datasheet PDF: Download Datasheet
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