LF444 is a Quad operational amplifier with the same AC characteristics as the industry standard LM1458 while greatly improving the DC characteristics of the LM1458. The IC is constructed using the junction field effect transistor technology (JFET). The IC is always available in a 14 – pin hermetically sealed dual in line IC packaging (DIP). LF444 also offers many additional features such as high input impedance, high gain bandwidth, low power dissipation, and high noise immunity, etc.
JFET Input Operational Amplifier
JFET (Junction field effect transistor) input operational amplifier is a simple electronic configuration that boosts up a voltage of lower strength to a higher level. Operational amplifiers are usually designed to be used with external feedback components such as resistors and capacitors. JFET operational amplifiers are also an essential feature for many audio instrumentation tools such as a decibel meter (dB meter). They are also a key feature of nearly every major analog electronic testing equipment.
LF444 Pinout
LF444 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | OUTPUT 1 | Output Of Amplifier 1 |
| 2 | IN 1 | Input Pin 1 Of Amplifier 1 |
| 3 | IN 2 | Input Pin 2 Of Amplifier 1 |
| 4 | VCC | Collector Supply Voltage |
| 5 | IN 1 | Input Pin 1 Of Amplifier 2 |
| 6 | IN 2 | Input Pin 2 Of Amplifier 2 |
| 7 | OUTPUT 2 | Output Of Amplifier 2 |
| 8 | OUTPUT 3 | Output Of Amplifier 3 |
| 9 | IN 1 | Input Pin 1 Of Amplifier 3 |
| 10 | IN 2 | Input Pin 2 Of Amplifier 3 |
| 11 | VEE | Emitter Supply |
| 12 | IN 1 | Input Pin 1 Of Amplifier 4 |
| 13 | IN 2 | Input Pin 2 Of Amplifier 4 |
| 14 | OUTPUT 4 | Output Of Amplifier 4 |
LF444 Features and Specification
- Number of channels (#): 4
- Total supply voltage (Max) (+5V=5, +/-5V=10): 36
- Total supply voltage (Min) (+5V=5, +/-5V=10): 6
- Rail-to-rail: In to V+
- GBW (Typ) (MHz): 1
- Slew rate (Typ) (V/us): 1
- Vos (offset voltage @ 25 C) (Max) (mV): 5
- Iq per channel (Typ) (mA): 0.15
- Vn at 1 kHz (Typ) (nV/rtHz): 35
- Rating: Catalog
- Operating temperature range (C): 0 to 70
- Offset drift (Typ) (uV/C): 10
- Input bias current (Max) (pA): 50
- CMRR (Typ) (dB): 100
- Output current (Typ) (mA): 14
- Architecture: FET
Application
- High Speed Integrators
- Fast D/A Converters
- Sample and Hold Circuits
LF444 Datasheet
You can download this datasheet for LF444 Quad JFET Input Op-Amp from the link given below:
See Also: CD4098 CMOS/MOS Dual Monostable Multivibrator – Datasheet | CD4072 Dual 4-Input OR Gate – Datasheet | CD4029 Binary-Decade Up-Down Counter – Datasheet
