TL081 – JFET-Input Operational Amplifier – TI

Part number : TL081

Functions : Wide Bandwidth JFET Input Operational Amplifier

Manufacturer : Texas Instruments, National

Image :

tl081-jfet-op-amp

 

 

DESCRIPTION

The TL081 is a low cost high speed JFET input operational amplifier with an internally trimmed input offset voltage (BI-FET IITM technology). The device requires a low supply current and yet maintains a large gain bandwidth product and a fast slew rate. In addition, well matched high voltage JFET input devices provide very low input bias and offset currents. The TL081 is pin compatible with the standard LM741 and uses the same offset voltage adjustment circuitry. This feature allows designers to immediately upgrade the overall performance of existing LM741 designs.

 

Pinout

tl081-datasheet-pinout

FEATURES

1.Low Power Consumption: 1.4 mA/ch Typ
2. Wide Common-Mode and Differential Voltage Ranges
3. Low Input Bias Current: 30 pA Typ
4. Low Input Offset Current: 5 pA Typ
5. Output Short-Circuit Protection
6. Low Total Harmonic Distortion: 0.003% Typ
7. High Input Impedance: JFET Input Stage
8. Latch-Up-Free Operation
9. High Slew Rate: 13 V/μs Typ
10. Common-Mode Input Voltage Range Includes Vcc+

Symbol

tl081-schematic-symbol

 

Official Homepage : http://www.ti.com/product/TL081

TL081 Datasheet PDF

 

Other data sheets within the file : TL081CP, TL081ACD

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LM3915 – Backlight LED Driver – National

Part number : LM3915, LM3915N

Function : Dot / Bar Display Driver

Package information : DIP 18 Pin type

Manufacturer : National Semiconductor, TI

Image

lm3915-led-driver

Product Information

The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing a logarithmic 3 dB/step analog display. One pin changes the display from a bar graph to a moving dot display. LED current drive is regulated and programmable, eliminating the need for current limiting resistors. The whole display system can operate from a single supply as low as 3V or as high as 25V. The IC contains an adjustable voltage reference and an accurate ten-step voltage divider. The high-impedance input buffer accepts signals down to ground and up to within 1.5V of the positive supply. Further, it needs no protection against inputs of ±35V. The input buffer drives 10 individual comparators referenced to the precision divider. Accuracy is typically better than 1 dB.

Pinout

lm3915-datasheet-pinout

 

Features

1. 3 dB/step, 30 dB range
2. Drives LEDs, LCDs, or vacuum fluorescents
3. Bar or dot display mode externally selectable by user
4. Expandable to displays of 90 dB
5. Internal voltage reference from 1.2V to 12V
6. Operates with single supply of 3V to 25V
7. Inputs operate down to ground
8. Output current programmable from 1 mA to 30 mA

 

Typical Applications

lm3915-application-circuit

 

Reference site : https://en.wikipedia.org/wiki/LM3914

 

LM3915 Datasheet PDF

 

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