Overview
The OPA2347EA/3KG4 is a dual-channel operational amplifier from Texas Instruments, part of the OPA347 series. This microPower, low-cost op amp is designed for use in portable and battery-powered equipment due to its small size and low power consumption. The OPA2347 is available in several packages, including SOT23-8 and WCSP-8, making it highly versatile for various applications. It operates on a single or dual power supply 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 |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VS = 5.5V, VCM = (V–) + 0.8V | 2 | 6 | 7 | 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 | 21 | 27 | µs | |
| Overload Recovery Time | VIN × Gain = VS | 23 | µs | ||
| Specified Voltage Range (VS) | 2.5 | 5.5 | V | ||
| Minimum Operating Voltage | 2.3 | V | |||
| Quiescent Current (per amplifier) (IQ) | IO = 0 | 20 | 34 | 38 | µA |
| Specified Temperature Range | –55 | 125 | °C | ||
| Thermal Resistance (θJA) | SOT23-8 Surface-Mount | 150 | °C/W |
Key Features
- Low Power Consumption: Maximum quiescent current of 34µA per channel.
- MicroSIZE Packages: Available in SOT23-8, WCSP-8, and other compact packages.
- High Speed/Power Ratio: Bandwidth of 350kHz.
- Rail-to-Rail Input and Output: Input range extends 200mV beyond the rails, and output range is within 5mV of the rails.
- Single Supply Operation: Operates from 2.3V to 5.5V.
- Unity-Gain Stable: Easy to use in various configurations.
- Capacitive Load Drive: Can drive up to 250pF pure capacitive load in unity-gain configuration.
- Optimized for ADC Driving: Suitable for driving medium-speed sampling Analog-to-Digital Converters (ADCs).
Applications
- Portable Equipment: Ideal for battery-powered devices due to low power consumption.
- Battery-Powered Equipment: Suitable for devices that require long battery life.
- 2-Wire Transmitters: Used in various communication devices.
- Smoke and CO Detectors: Reliable operation in safety and monitoring systems.
- Data Acquisition Systems: Used in speech bandpass filtered data acquisition systems.
Q & A
- What is the typical quiescent current of the OPA2347EA/3KG4?
The typical quiescent current is 34µA per channel.
- What is the operating voltage range of the OPA2347EA/3KG4?
The operating voltage range is from 2.3V to 5.5V.
- What is the bandwidth of the OPA2347EA/3KG4?
The bandwidth is 350kHz.
- Can the OPA2347EA/3KG4 operate with a single supply?
- What is the input offset voltage of the OPA2347EA/3KG4?
The input offset voltage is typically 6mV.
- What is the thermal resistance of the SOT23-8 package?
The thermal resistance is 150°C/W.
- Can the OPA2347EA/3KG4 drive capacitive loads?
- Is the OPA2347EA/3KG4 suitable for driving ADCs?
- What are the common applications of the OPA2347EA/3KG4?
- What is the specified temperature range for the OPA2347EA/3KG4?
