Overview
The OPA234UAG4 is a dual operational amplifier from Texas Instruments, designed for low-power, precision applications. This device is part of the OPA234 series, which is known for its low quiescent current, low input bias current, and high common-mode rejection ratio (CMRR). The OPA234UAG4 operates from either single or dual supplies, making it versatile for various circuit designs. It is particularly suitable for single-supply, low-voltage, and low-power applications, including portable and battery-powered devices.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VCM = 2.5V | ±40 | ±100 | ±250 | µV |
| Input Bias Current (IB) | VCM = 2.5V | –15 | –30 | –50 | nA |
| Common-Mode Rejection Ratio (CMRR) | VCM = –0.1V to 4V | 91 | 106 | 86 | dB |
| Open-Loop Voltage Gain (AOL) | RL = 10kΩ | 108 | 120 | 100 | dB |
| Gain-Bandwidth Product (GBW) | CL = 100pF | 0.35 | MHz | ||
| Slew Rate (SR) | 0.2 | V/µs | |||
| Operating Voltage Range | +2.7 | +36 | V | ||
| Quiescent Current (IQ) | IO = 0 | 250 | 300 | µA | |
| Operating Temperature Range | –40 | +85 | °C |
Key Features
- Low Quiescent Current: 250µA per amplifier, making it ideal for battery-powered and low-power applications.
- Low Input Bias Current: Maximum of 30nA, ensuring minimal current draw from the input signal.
- Low Offset Voltage: Maximum of 100µV, providing high accuracy in signal amplification.
- High CMRR and PSRR: High common-mode rejection ratio and power-supply rejection ratio ensure excellent stability and accuracy across varying supply voltages.
- Wide Supply Range: Operates from +2.7V to +36V, allowing flexibility in circuit design.
- Single, Dual, and Quad Versions: Available in various configurations to suit different design needs.
- Capacitive Load Drive: Stable operation with capacitive loads up to 1000pF.
Applications
- Portable and Battery-Powered Devices: Ideal for devices where low power consumption is critical.
- Single-Supply Systems: Suitable for systems operating from a single power supply.
- Low-Voltage Applications: Effective in circuits where low voltage operation is required.
- General-Purpose Amplification: Can be used in a variety of general-purpose amplification tasks due to its high accuracy and stability.
- Medical and Industrial Equipment: Applicable in medical devices and industrial control systems where precision and reliability are essential.
Q & A
- What is the typical quiescent current of the OPA234UAG4?
The typical quiescent current is 250µA per amplifier.
- What is the maximum input offset voltage of the OPA234UAG4?
The maximum input offset voltage is ±250µV.
- What is the common-mode rejection ratio (CMRR) of the OPA234UAG4?
The CMRR is typically 106dB.
- What is the gain-bandwidth product (GBW) of the OPA234UAG4?
The GBW is 0.35MHz with a load capacitance of 100pF.
- What is the slew rate of the OPA234UAG4?
The slew rate is 0.2V/µs.
- What is the operating temperature range of the OPA234UAG4?
The specified operating temperature range is –40°C to +85°C.
- Can the OPA234UAG4 operate from a single supply?
- What is the maximum capacitive load the OPA234UAG4 can drive?
The OPA234UAG4 can drive capacitive loads up to 1000pF for stable operation.
- What are the typical applications of the OPA234UAG4?
The OPA234UAG4 is typically used in portable and battery-powered devices, single-supply systems, and low-voltage applications.
- What is the thermal resistance of the OPA234UAG4 in an SO-8 package?
The thermal resistance (θJA) in an SO-8 surface-mount package is 150°C/W.
