Overview
The OPA2347UA/2K5G4 is a dual-channel operational amplifier produced by Texas Instruments. It is part of the OPA347 series, known for its microPower consumption and low-cost design. This amplifier is available in several compact packages, including the SOT23-8 and WCSP-8, making it ideal for space-limited and low-power applications. The OPA2347 is highly versatile, operating on a single or dual power supply from 2.3V to 5.5V and specified for operation from –55°C to +125°C.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VS = 5.5V, VCM = (V–) + 0.8V | 2 | 6 | mV | |
| Input Offset Voltage Drift (dVOS/dT) | 3 | µV/°C | |||
| Power Supply Rejection Ratio (PSRR) | VS = 2.5V to 5.5V, VCM < (V+) – 1.7V | 100 | 115 | dB | |
| Open-Loop Gain (AOL) | VS = 5.5V, RL = 5kΩ | 96 | 115 | dB | |
| Output Voltage Swing from Rail | RL = 100kΩ, AOL > 100dB | 5 | 15 | mV | |
| Short-Circuit Current (ISC) | ±17 | mA | |||
| Gain-Bandwidth Product (GBW) | 350 | kHz | |||
| Slew Rate (SR) | G = +1 | 0.17 | V/µs | ||
| Quiescent Current (IQ) per Amplifier | IO = 0 | 20 | 34 | µA | |
| Specified Voltage Range (VS) | 2.5 | 5.5 | V | ||
| Operating Temperature Range | –55 | 125 | °C |
Key Features
- Low power consumption: 34µA per channel maximum.
- MicroSIZE packages: WCSP-8, SC70-5, SOT23-5, SOT23-8, and TSSOP-14.
- High speed/power ratio with a bandwidth of 350kHz.
- Rail-to-rail input and output swing.
- Single supply operation from 2.3V to 5.5V.
- Unity-gain stable.
- Capable of driving up to 250pF pure capacitive load in unity-gain configuration.
- Optimized for driving medium-speed sampling Analog-to-Digital Converters (ADCs).
Applications
- Portable equipment.
- Battery-powered equipment.
- 2-wire transmitters.
- Smoke detectors.
- CO detectors.
- Space-limited, low-power applications.
- Driving ADCs in data acquisition systems.
Q & A
- What is the typical quiescent current per amplifier for the OPA2347? The typical quiescent current per amplifier is 34µA.
- What is the bandwidth of the OPA2347? The bandwidth of the OPA2347 is 350kHz.
- What is the input common-mode voltage range of the OPA2347? The input common-mode voltage range extends from (V–) – 0.2V to (V+) + 0.2V.
- Can the OPA2347 operate on a single power supply? Yes, the OPA2347 can operate on a single power supply from 2.3V to 5.5V.
- What is the maximum output voltage swing from the rail for the OPA2347? For light resistive loads (> 100kΩ), the output voltage can typically swing to within 5mV from the supply rail.
- How much capacitive load can the OPA2347 drive in unity-gain configuration? The OPA2347 can directly drive up to 250pF pure capacitive load in unity-gain configuration.
- Is the OPA2347 suitable for driving ADCs? Yes, the OPA2347 is optimized for driving medium-speed sampling Analog-to-Digital Converters (ADCs).
- What are the typical operating temperature ranges for the OPA2347? The OPA2347 is specified for operation from –55°C to +125°C.
- What are the package options available for the OPA2347? The OPA2347 is available in SOT23-8, WCSP-8, SO-8, and other packages.
- How does the OPA2347 handle rail-to-rail input and output? The OPA2347 features rail-to-rail input and output swing, significantly increasing dynamic range, especially in low supply applications.
