Overview
The OPA349SA/3K is a high-performance, low-power operational amplifier (op-amp) manufactured by Texas Instruments. This device is part of the OPA349 series, known for its ultra-low quiescent current and rail-to-rail input and output capabilities. The OPA349SA/3K is packaged in a 5-pin SOT-SC70 (DCK) package, making it suitable for space-constrained and power-sensitive applications.
This op-amp is designed to operate over a wide supply voltage range from 1.8V to 5.5V, making it versatile for various battery-powered and low-voltage systems. Its low supply current of 1 µA per channel and high input impedance make it an ideal choice for battery-powered devices and other low-power applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOT-SC70 (DCK) | - |
| Pins | 5 | - |
| Operating Temperature Range | -40 to 85°C | °C |
| Gain-Bandwidth Product (Typ) | 70 kHz | kHz |
| Supply Voltage Range | 1.8V to 5.5V | V |
| Quiescent Current per Channel (Typ) | 1 µA | µA |
| Input Bias Current (Max) | 10 pA | pA |
| Output Drive Current (Typ) | 8 mA | mA |
| Slew Rate (Typ) | 0.02 V/µs | V/µs |
| Common Mode Rejection Ratio (Typ) | 60 dB | dB |
| Offset Voltage (Max) | 10 mV | mV |
| Open-Loop Gain | 90 dB | dB |
Key Features
- Low Supply Current: 1 µA per channel, making it suitable for battery-powered devices.
- Gain-Bandwidth Product: 70 kHz, providing a balance between gain and bandwidth.
- Unity Gain Stable: Ensures stability in unity gain configurations.
- Low Input Bias Current: 10 pA maximum, reducing the impact on input signals.
- Wide Supply Range: Operates from 1.8V to 5.5V, accommodating various power sources.
- Rail-to-Rail Input and Output: Input range extends 200mV beyond the rails, and output swings to within 350mV of the rails.
- High Output Drive Current: 8 mA typical, capable of driving moderate loads.
- Compact Package: Available in SC70, SOT23-5, and SOT23-8 packages for space-constrained designs.
Applications
- Battery Packs and Power Supplies: Ideal for low-power battery management and power supply circuits.
- Portable Phones and Personal Audio (PA) Systems: Suitable for audio amplification in portable devices due to its low power consumption and small package size.
- Sensor Interfaces and Data Acquisition Systems: Used in sensor interfaces and data acquisition systems where low power and high accuracy are required.
- Medical Devices and Wearables: Applicable in medical devices and wearables that require low power and compact designs.
Q & A
- What is the typical quiescent current of the OPA349SA/3K?
The typical quiescent current is 1 µA per channel.
- What is the gain-bandwidth product of the OPA349SA/3K?
The gain-bandwidth product is 70 kHz.
- What is the operating temperature range of the OPA349SA/3K?
The operating temperature range is -40°C to 85°C.
- What is the input bias current of the OPA349SA/3K?
The maximum input bias current is 10 pA.
- What is the output drive current of the OPA349SA/3K?
The typical output drive current is 8 mA.
- Is the OPA349SA/3K unity gain stable?
Yes, the OPA349SA/3K is unity gain stable.
- What is the supply voltage range of the OPA349SA/3K?
The supply voltage range is from 1.8V to 5.5V.
- What are the common package types available for the OPA349SA/3K?
The OPA349SA/3K is available in SC70, SOT23-5, and SOT23-8 packages.
- What are some typical applications of the OPA349SA/3K?
Typical applications include battery packs and power supplies, portable phones and PA systems, sensor interfaces, and medical devices.
- Is the OPA349SA/3K RoHS compliant?
Yes, the OPA349SA/3K is RoHS compliant.
