Overview
The UA747CN is a dual general-purpose operational amplifier produced by Texas Instruments. Each half of the amplifier is electrically similar to the uA741 and features offset-voltage null capability. This device is designed for a wide range of applications due to its high common-mode input voltage range, absence of latch-up, and internal frequency compensation, which ensures stability without the need for external components. The UA747CN is available in a 14-pin plastic DIP (PDIP) package and is characterized for operation from 0°C to 70°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC+) | ±18 | V |
| Supply Voltage (VCC-) | ±18 | V |
| Differential Input Voltage | ±30 | V |
| Input Voltage (any input) | ±15 | V |
| Input Offset Voltage (VIO) at 25°C | 1 - 6 | mV |
| Input Offset Current (IIO) at 25°C | 20 - 200 | nA |
| Input Bias Current (IIB) at 25°C | 80 - 500 | nA |
| Common-Mode Input Voltage Range | ±12 to ±13 | V |
| Short-Circuit Output Current | ±25 to ±40 | mA |
| Operating Free-Air Temperature Range | 0 to 70 | °C |
| Storage Temperature Range | −65 to 150 | °C |
Key Features
- No Frequency Compensation Required
- Low Power Consumption
- Short-Circuit Protection
- Offset-Voltage Null Capability
- Wide Common-Mode and Differential Voltage Ranges
- No Latch-Up
- Designed to Be Interchangeable With Fairchild uA747C and uA747M
Applications
The UA747CN is ideal for various applications due to its robust specifications. It is particularly suited for voltage-follower applications, thanks to its high common-mode input voltage range and the absence of latch-up. Additionally, it can be used in general-purpose amplifier circuits, audio amplifiers, and other applications where stability and low power consumption are critical.
Q & A
- What is the UA747CN operational amplifier? The UA747CN is a dual general-purpose operational amplifier featuring offset-voltage null capability, similar to the uA741.
- What is the operating temperature range of the UA747CN? The UA747CN operates from 0°C to 70°C.
- What is the supply voltage range for the UA747CN? The supply voltage range is ±18 V.
- Does the UA747CN require external frequency compensation? No, the UA747CN has internal frequency compensation and does not require external components for stability.
- What is the input offset voltage range at 25°C? The input offset voltage range at 25°C is 1 to 6 mV.
- Is the UA747CN protected against short circuits? Yes, the UA747CN has short-circuit protection.
- What are the common applications of the UA747CN? It is used in voltage-follower applications, general-purpose amplifier circuits, and audio amplifiers.
- Can the UA747CN be used in military temperature ranges? The UA747M variant is characterized for operation over the full military temperature range of −55°C to 125°C.
- What package types are available for the UA747CN? The UA747CN is available in a 14-pin plastic DIP (PDIP) package.
- How do you null out the offset voltage in the UA747CN? A low-value potentiometer can be connected between the offset null inputs to null out the offset voltage.
