LF444ACN National Semiconductor, LF444ACN Datasheet - Page 9

• Manufacturer Part Number: LF444ACN
• Description: Operational Amplifier (Op-Amp) IC
• Manufacturer: National Semiconductor

Specifications of LF444ACN

• No. Of Amplifiers: 4
• Slew Rate: 1V/µs
• No. Of Pins: 14
• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Mounting Type: Through Hole
• Package / Case: 14-DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Typical Application
***For R2 = 50k, R4 = 330k
For R2 = 100k, R4 = 75k
For R2 = 200k, R4 = 56k
**Polystyrene
*Film resistor type RN60C
To calibrate, insert probe in pH =7 solution. Set the “TEMPERATURE ADJUST” pot, R2, to correspond to the solution temperature: full clockwise for 0˚C, and
proportionately for intermediate temperatures, using a turns-counting dial. Then set “CALIBRATE” pot so output reads 7V.
Typical probe = Ingold Electrodes #465-35
±
±
1%
1%
±
1%
pH Probe Amplifier/Temperature Compensator
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