LF442ACN National Semiconductor, LF442ACN Datasheet - Page 10

• Manufacturer Part Number: LF442ACN
• Description: Operational Amplifier (Op-Amp) IC
• Manufacturer: National Semiconductor

Specifications of LF442ACN

• No. Of Amplifiers: 2
• Slew Rate: 1V/µs
• No. Of Pins: 8
• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Mounting Type: Through Hole
• Package / Case: 8-DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Typical Applications
Trim 1M pot for 1 kHz full-scale output
15 mW power drain
No integrator reset FET required
Mount D1 and D2 in close proximity
1% linearity to 1 kHz
• T
• A1’s output represents the amplified difference between the LM335 temperature sensor and the crystal oven’s temperature
• A2, a free running duty cycle modulator, drives the LM395 to complete a servo loop
• Switched mode operation yields high efficiency
• 1% metal film resistor
control
= 75˚C
(Continued)
High Efficiency Crystal Oven Controller
“No FET” Low Power V → F Converter
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