TI LM369BH

The LM169/LM369 are precision monolithic temperature-compensated voltage references. They are based on a burjed zener reference as pioneered in the LM199 references, but do not require any heater, as they rely on special temperature-compensation techniques (Patent Pending). The LM169 makes use of thin-film technology enhanced by the discrete laser trimming of resistors to achieve excellent Temperature coefficient (Tempco) of V₀ₒₜ (as low as 1 ppm/°C), along with tight initial tolerances (as low as 0.05% max). The trim scheme is such that individual resistors are cut open rather than being trimmed (partially cut), to avoid resistor drift caused by electromigration in the trimmed area. The LM169 also provides excellent stability vs. changes in input voltage and output current (both sourcing and sinking). The devices have a 10.00V output and will operate in either series or shunt mode; the output is short-circuit-proof to ground. A trim pin is available which permits fine-trimming of Vₒₒₜ, and also permits filtering to greatly decrease the output noise by adding a small capacitor (0.05 to 0.5 μF).

• Low Tempco 3 ppm/°C (max)
• Excellent initial accuracy ±5 mV (max)
• Excellent line regulation 4 ppm/V (max)
• Excellent output impedance ±0.8Ω (max)
• Excellent thermal regulation ±20 ppm/100 mW (max)
• Low noise
• Easy to filter output noise
• Operates in series or shunt mode

• High-Resolution Data Acquisition Systems
• Digital volt meters
• Weighing systems
• Precision current sources
• Test Equipment