Overview
The LPV321-N, specifically the LPV321M5X/NOPB, is a single-channel, low-voltage, low-power operational amplifier produced by Texas Instruments. This device is part of the LPV3xx-N family, which includes the LPV321-N (single), LPV358-N (dual), and LPV324-N (quad) operational amplifiers. The LPV321-N is designed for applications where low power consumption, low voltage operation, and space efficiency are crucial. Built using Texas Instruments' advanced submicron silicon-gate BiCMOS process, these amplifiers offer bipolar input and output stages, enhancing noise performance and output current drive.
The LPV321-N is particularly suited for general-purpose low-voltage applications and portable devices, offering a rail-to-rail output swing and an input common-mode voltage range that includes ground. This makes it an ideal choice for battery-powered systems and small electronic devices such as cellular phones and pagers.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage | 2.7 | - | 5 | V |
| Operating Temperature | -40 | - | 85 | °C |
| Gain-Bandwidth Product | - | 152 | - | kHz |
| Supply Current (per channel at 5 V) | 9 | - | 12 | µA |
| Output Swing (sourcing, RL = 100 kΩ to 2.5 V at 25°C) | V+ - 100 mV | V+ - 3.5 mV | V+ - 200 mV | mV |
| Output Swing (sinking, RL = 100 kΩ to 2.5 V at 25°C) | 90 mV | - | 180 mV | mV |
| Output Short Circuit Current (sourcing, VO = 0 V) | 2 | - | 16 | mA |
| Input Common-Mode Voltage Range | -0.2 | - | V+ - 0.8 | V |
| Package Type | - | SC70 (5-pin), SOT-23 (5-pin) | - | - |
Key Features
- No Crossover Distortion: Ensures clean and accurate signal amplification.
- Space-Saving Package: Available in 5-pin SC70 and SOT-23 packages, which are approximately half the size of traditional packages, enabling the design of smaller electronic devices.
- Industrial Temperature Range: Operates from -40°C to 85°C, making it suitable for a wide range of environments.
- Low Supply Current: Consumes only 9 µA per channel at 5 V, maximizing battery life in portable devices.
- Rail-to-Rail Output Swing: Provides maximum possible dynamic range at the output, particularly important in low-supply voltage applications.
- Input Common-Mode Voltage Range Includes Ground: Allows direct sensing near ground in single-supply operation.
- Capacitive Load Tolerance: Can directly drive 200 pF in unity-gain without oscillation.
- Bipolar Input Stage: Enhances noise performance and higher output current drive.
Applications
- Active Filters: Suitable for designing active filters due to its low power and high accuracy.
- General-Purpose Low Voltage Applications: Ideal for applications requiring low voltage and low power operation.
- General-Purpose Portable Devices: Used in cellular phones, pagers, and other portable electronic systems.
- Battery-Powered Systems: Maximizes battery life due to its low supply current.
Q & A
- What is the typical supply current of the LPV321-N at 5 V?
The typical supply current of the LPV321-N at 5 V is 9 µA per channel.
- What is the gain-bandwidth product of the LPV321-N?
The gain-bandwidth product of the LPV321-N is 152 kHz.
- What are the available package types for the LPV321-N?
The LPV321-N is available in 5-pin SC70 and SOT-23 packages.
- What is the operating temperature range of the LPV321-N?
The operating temperature range of the LPV321-N is from -40°C to 85°C.
- Does the LPV321-N support rail-to-rail output swing?
Yes, the LPV321-N supports rail-to-rail output swing.
- Can the LPV321-N directly sense near ground in single-supply operation?
Yes, the input common-mode voltage range of the LPV321-N includes ground.
- How much capacitive load can the LPV321-N drive without oscillation?
The LPV321-N can directly drive 200 pF in unity-gain without oscillation.
- What is the typical input bias current of the LPV321-N?
The typical input bias current of the LPV321-N is 1.5 nA with a 5-V supply.
- How can the error caused by input bias current be reduced in the LPV321-N?
The error caused by input bias current can be reduced by balancing the resistor values at both inverting and noninverting inputs.
- What are some common applications of the LPV321-N?
The LPV321-N is commonly used in active filters, general-purpose low voltage applications, and general-purpose portable devices.
