IC OPAMP GP 2 CIRCUIT TO100-10 The LM747 is a general-purpose dual operational amplifier. This article mainly covers pinout, datasheet, applications, alternatives, and other details about LM747.
5050
Sep 9, 2021
Isaac Walton
LM747 747 dual op amp comparator circuit and virtual ground demonstration circuit
IC OPAMP GP 2 CIRCUIT TO100-10
The LM747 is a general-purpose dual operational amplifier. This article mainly covers pinout, datasheet, applications, alternatives, and other details about LM747. Furthermore, there is a huge range of Semiconductors, Capacitors, Resistors, and Ics in stock. Welcome RFQ!
LM747H
| Pin | Name | Description |
| 4 | V- | Common negative supply voltage for both Op-amps |
| 11 | NC | No connection |
| OP-AMP1 | ||
| 12 | 1OUT | The output pin of the op-amp 1 |
| 1 | 1IN- | Inverting input of op-amp 1 |
| 2 | 1IN+ | The non-Inverting input of op-amp 1 |
| 3,14 | OFFSET NULL 1 | Offset null pin used to eliminate the offset voltage and balance the input voltages for op-amp 1 |
| 13 | V1+ | Positive supply voltage for op-amp1 |
| OP-AMP2 | ||
| 6 | 2IN+ | The non-Inverting input of op-amp 2 |
| 7 | 2IN- | Inverting input of op-amp 2 |
| 10 | 2OUT | The output pin of the op-amp 2 |
| 5,8 | OFFSET NULL 2 | Offset null pin used to eliminate the offset voltage and balance the input voltages for op-amp 2 |
| 9 | V2+ | Positive supply voltage for op-amp 2 |
Symbol
Symbol
Footprint
Footprint
The LM747 is a general-purpose dual operational amplifier. The two amplifiers share a common bias network and power supply leads. Otherwise, their operation is completely independent.
Texas Instruments LM747H technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments LM747H.
Texas Instruments LM747H technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments LM747H.
| Product Attribute | Attribute Value | |
|---|---|---|
| Mounting Type | Through Hole | |
| Package / Case | TO-100-10 Metal Can | |
| Surface Mount | NO | |
| Operating Temperature | -55°C~125°C | |
| Packaging | Bulk | |
| Part Status | Obsolete | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | |
| Number of Terminations | 10Terminations | |
| ECCN Code | EAR99 | |
| Terminal Position | BOTTOM | |
| Terminal Form | WIRE | |
| Number of Functions | 2Functions | |
| Supply Voltage | 15V |
| Product Attribute | Attribute Value | |
|---|---|---|
| Base Part Number | LM747 | |
| JESD-30 Code | O-MBCY-W10 | |
| Number of Circuits | 2Circuits | |
| Current - Supply | 1.7mA | |
| Slew Rate | 0.5V/μs | |
| Architecture | VOLTAGE-FEEDBACK | |
| Amplifier Type | General Purpose | |
| Common Mode Rejection Ratio | 90 dB | |
| Current - Input Bias | 80nA | |
| Voltage - Supply, Single/Dual (±) | 10V~44V ±5V~22V | |
| Gain Bandwidth Product | 1.5MHz | |
| Neg Supply Voltage-Nom (Vsup) | -15V | |
| Average Bias Current-Max (IIB) | 1.5μA |
| Product Attribute | Attribute Value | |
|---|---|---|
| Low-Offset | NO | |
| Frequency Compensation | NO | |
| Voltage - Input Offset | 1mV | |
| Low-Bias | NO | |
| Micropower | NO | |
| Bias Current-Max (IIB) @25C | 0.5μA | |
| Programmable Power | NO | |
| Wideband | YES | |
| Power | NO | |
| Input Offset Current-Max (IIO) | 0.5μA | |
| Voltage Gain-Min | 50000 | |
| Common-mode Reject Ratio-Min | 70 dB | |
| RoHS Status | Non-RoHS Compliant |
No frequency compensation required
Short-circuit protection
Wide common-mode and differential voltage ranges
Low power consumption
No latch-up
Balanced offset null
Analog circuits
Mathematical operations
Amplifiers
Voltage comparators
Peak detectors
Industrial
Measuring instruments
Connection Diagram
In the above connection diagram of LM747, the two op-amps in the chip can be used to design most op-amp-based circuits like voltage follower, comparator, differential amplification, and mathematical operations. And to understand the working of the device we will use a single op-amp to construct a simple microphone pre-amplifier circuit as given below.
LM747 Circuit
In-circuit:
The microphone output signal is given as input to an op-amp for amplification
R1 and C1 form a high pass filter for cutting of DC signal from the microphone
The amplified output listens through the small speaker connected at the output
R2 and R3 resistors form a feedback loop for the non-inverting amplifier of the op-amp.
The equation for the output VO =Input voltage * Gain = VI * A = VI * (1+R2/R3)
For example:
Say R2 = 1MΩ, R3 = 1kΩ and microphone output voltage = 1mV
We will have voltage output VO= 1m*(1+1000) =1V approximately
This voltage appears across the speaker and we can listen to the sound. And with that, we have realized the amplifier circuit of op-amp and in a similar way, we use the device to design all other application circuits of the op-amp.
Texas Instruments (TI) is a global semiconductor firm originating in 1958 and nowadays it has over 30,000 employees who design, conduct, and sell analog and product-differentiating embedded processing components in 35 countries. Aimed at changing the world of tech, TI has put great effort into becoming the solution provider coupled with a vision.
Download datasheets and manufacturer documentation for Texas Instruments LM747H.
Download datasheets and manufacturer documentation for LM747H
TAGS
Comments