Overview
The OPA347SA/250 is a microPower, low-cost operational amplifier from Texas Instruments. This single-channel op-amp is part of the OPA347 series, known for its small size and low power consumption, making it ideal for portable and battery-powered applications. The OPA347SA/250 is available in the SC70-5 package, which is a compact surface-mount package. It operates on a single supply voltage ranging from 2.3V to 5.5V and is fully specified over a temperature range of –55°C to +125°C.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply Voltage Range | 2.5 | 5.5 | V | ||
| Minimum Operating Voltage | 2.3 | V | |||
| Quiescent Current (per amplifier) | IO = 0 | 20 | 34 | 38 | µA |
| Input Offset Voltage | VS = 5.5V, VCM = (V–) + 0.8V | 2 | 6 | mV | |
| Bandwidth | 350 | kHz | |||
| Operating Temperature Range | –55 | 125 | °C | ||
| Thermal Resistance (θJA) | SC70-5 Surface-Mount | 250 | °C/W |
Key Features
- Low power consumption: 34µA per channel maximum.
- MicroSIZE packages: Available in SC70-5, SOT23-5, SOT23-8, TSSOP-14, and other packages.
- High speed/power ratio with a bandwidth of 350kHz.
- Rail-to-rail input and output swing, increasing dynamic range especially in low supply applications.
- Single supply operation from 2.3V to 5.5V.
- Unity-gain stable and capable of operating on a single supply.
- Class AB output stage with common-source transistors for rail-to-rail output.
- Capable of driving up to 250pF pure capacitive load in unity-gain configuration.
Applications
- Portable equipment.
- Battery-powered equipment.
- 2-wire transmitters.
- Smoke detectors.
- CO detectors.
Q & A
- What is the typical quiescent current of the OPA347SA/250?
The typical quiescent current is 34µA per channel.
- What is the operating temperature range of the OPA347SA/250?
The operating temperature range is from –55°C to +125°C.
- What is the bandwidth of the OPA347SA/250?
The bandwidth is 350kHz.
- Can the OPA347SA/250 operate on a single supply?
- What is the input common-mode voltage range of the OPA347SA/250?
The input common-mode voltage range extends from (V–) – 0.2V to (V+) + 0.2V.
- How much capacitive load can the OPA347SA/250 drive in unity-gain configuration?
It can directly drive up to 250pF pure capacitive load in unity-gain configuration.
- What is the thermal resistance (θJA) of the SC70-5 package?
The thermal resistance (θJA) is 250°C/W.
- Is the OPA347SA/250 rail-to-rail input and output?
- What are some typical applications of the OPA347SA/250?
Typical applications include portable equipment, battery-powered equipment, 2-wire transmitters, smoke detectors, and CO detectors.
- How should the power-supply pins be bypassed for the OPA347SA/250?
The power-supply pins should be bypassed with 0.01µF ceramic capacitors.
