Overview
The OPA349SA/250 is an ultra-low power operational amplifier produced by Texas Instruments. This device is part of the OPA349 series, which includes rail-to-rail input and output amplifiers designed for battery-powered applications. The OPA349SA/250 is particularly suited for high-density applications due to its miniature packaging. It operates with a quiescent current of just 1µA, making it highly efficient for power-sensitive designs.
Key Specifications
| Parameter | Condition | Min | Max | Units | |
|---|---|---|---|---|---|
| Supply Voltage Range | V+ to V– | 1.8 | 5.5 | V | |
| Quiescent Current (per amplifier) | IO = 0 | 1 | 1 | 2 | µA |
| Input Offset Voltage | VS = 5V, VCM = 2.5V | ±2 | ±10 | mV | |
| Input Bias Current | 10 | pA | |||
| Common-Mode Voltage Range | (V–) – 0.2 to (V+) + 0.2 | V | |||
| Operating Temperature Range | 0 | 70 | °C | ||
| Bandwidth (Typ) | 70kHz | ||||
| CMRR (Typ) | 60dB | ||||
| Output Current (Typ) | 8mA | ||||
| Package Type | SC70 |
Key Features
- Ultra-Low Power Consumption: The OPA349SA/250 operates with a quiescent current of only 1µA, making it ideal for battery-powered applications.
- Rail-to-Rail Input and Output: The amplifier can handle input signals and output voltages that swing close to the power supply rails, ensuring a wide dynamic range.
- Unity-Gain Stability: No external compensation is required to achieve wide bandwidth, simplifying circuit design.
- Low Input Bias Current: Allows the use of large source and feedback resistors, which is beneficial for high-impedance circuits.
- Compact Packaging: Available in miniature SC70 packages, ideal for high-density applications such as PCMCIA cards, battery packs, and portable instruments.
- Broad Operating Temperature Range: Specified for operation from 0°C to +70°C, ensuring reliability in various environmental conditions.
Applications
- Battery-Powered Devices: Ideal for devices where power consumption is critical, such as portable medical equipment, handheld instruments, and battery-powered sensors.
- High-Density Designs: Suitable for applications requiring compact form factors, such as PCMCIA cards, smart cards, and other space-constrained devices.
- Portable Instruments: Used in portable analytical instruments, data loggers, and other field equipment where low power and small size are essential.
- Consumer Electronics: Applicable in low-power consumer electronics, including wearable devices, fitness trackers, and other IoT devices.
Q & A
- What is the quiescent current of the OPA349SA/250?
The quiescent current is 1µA per amplifier.
- What is the operating temperature range of the OPA349SA/250?
The operating temperature range is from 0°C to +70°C.
- What type of packaging is available for the OPA349SA/250?
The OPA349SA/250 is available in SC70 packaging.
- Is the OPA349SA/250 unity-gain stable?
Yes, the OPA349SA/250 is unity-gain stable and does not require external compensation.
- What is the bandwidth of the OPA349SA/250?
The bandwidth is typically 70kHz.
- What is the common-mode rejection ratio (CMRR) of the OPA349SA/250?
The CMRR is typically 60dB.
- Can the OPA349SA/250 handle rail-to-rail input and output signals?
Yes, the OPA349SA/250 has rail-to-rail input and output capabilities.
- What is the input bias current of the OPA349SA/250?
The input bias current is typically 10pA.
- What are some typical applications for the OPA349SA/250?
Typical applications include battery-powered devices, high-density designs, portable instruments, and consumer electronics.
- Is the OPA349SA/250 suitable for use in high-impedance circuits?
Yes, the low input bias current makes it suitable for high-impedance circuits.
