LF442CN/NOPB National Semiconductor, LF442CN/NOPB Datasheet - Page 10

• Manufacturer Part Number: LF442CN/NOPB
• Description: IC OP AMP DUAL LO PWR JFET 8-DIP
• Manufacturer: National Semiconductor
• Series: BI-FET II™r

Specifications of LF442CN/NOPB

• Amplifier Type: J-FET
• Number Of Circuits: 2
• Slew Rate: 1 V/µs
• Gain Bandwidth Product: 1MHz
• Current - Input Bias: 10pA
• Voltage - Input Offset: 1000µV
• Current - Supply: 400µA
• Voltage - Supply, Single/dual (±): 10 V ~ 36 V, ±5 V ~ 18 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Bandwidth: 1 MHz
• Channel Separation: -120
• Common Mode Rejection Ratio: 95
• Current, Input Bias: 10 pA
• Current, Input Offset: 5 pA
• Current, Output: 6.8 mA
• Current, Supply: 400 μA
• Impedance, Thermal: 152 °C/W
• Number Of Amplifiers: Dual
• Package Type: MDIP-8
• Resistance, Input: 10^12 Ohms
• Temperature, Operating, Range: 0 to +70 °C
• Voltage, Gain: 200 V/mV
• Voltage, Input: 6 to 44 V
• Voltage, Noise: 35 nV/sqrt Hz
• Voltage, Offset: 1 mV
• Voltage, Output, High: 13 V
• Voltage, Output, Low: -13 V
• Voltage, Supply: ±15 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Current - Output / Channel: -
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device
• Other names: *LF442CN; *LF442CN/NOPB; LF442; LF442CN

www.national.com
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
10
00915512
00915513