Overview
The OPA342NA/250, part of the OPA342 series, is a low-cost, low-power rail-to-rail CMOS operational amplifier designed by Texas Instruments. These amplifiers are optimized for miniature applications and offer high performance with minimal power consumption. They are available in single, dual, and quad configurations, providing design flexibility. The OPA342NA/250 is specifically packaged in a SOT23-5 surface mount package and is suitable for a wide range of applications requiring low power and high dynamic range.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply Voltage | V+ to V- | - | - | 7.5 | V |
| Input Offset Voltage (VOS) | VCM = VS/2 | ±1 | ±6 | - | mV |
| Power Supply Rejection Ratio (PSRR) | VS = 2.7V to 5.5V, VCM < (V+) - 1.8V | 30 | 200 | - | µV/V |
| Input Bias Current (IB) | - | ±0.2 | - | - | nA |
| Common-Mode Rejection Ratio (CMRR) | VS = +2.7V, –0.3V < VCM < 3V | 62 | 74 | - | dB |
| Open-Loop Gain (AOL) | RL = 100kΩ, 10mV < VO < (V+) – 10mV | 104 | 124 | - | dB |
| Gain-Bandwidth Product (GBW) | - | - | 1 | - | MHz |
| Slew Rate (SR) | - | - | 1 | - | V/µs |
| Quiescent Current (IQ) | IO = 0A | 150 | 250 | - | µA |
| Operating Temperature Range | - | -40 | - | 85 | °C |
| Storage Temperature Range | - | -65 | - | 150 | °C |
Key Features
- Rail-to-Rail Input and Output: The OPA342 series offers rail-to-rail input and output swing, significantly increasing the dynamic range, especially in low supply voltage applications.
- Low Power Consumption: These amplifiers have a quiescent current of only 150µA typical, making them suitable for power-sensitive applications.
- Single Supply Capability: The OPA342 series can operate on a single supply as low as 2.5V, with an input common-mode voltage range extending 300mV beyond the supply rails.
- High-Speed Operation: With a gain-bandwidth product of 1 MHz and a slew rate of 1 V/µs, these amplifiers are ideal for high-speed applications.
- Low Cost and Miniature Packages: Available in SOT23-5, MSOP-8, SO-8, TSSOP-14, and other packages, these amplifiers are cost-effective and space-efficient.
- High Dynamic Response: Excellent dynamic response with low total harmonic distortion plus noise (THD + N) of 0.006%.
Applications
- Communications: Suitable for various communication systems due to their high dynamic range and low power consumption.
- PCMCIA Cards: Ideal for use in PCMCIA cards where space and power efficiency are crucial.
- Data Acquisition: Used in data acquisition systems for their ability to drive sampling Analog-to-Digital Converters (ADCs).
- Process Control: Applied in process control systems for their stability and accuracy.
- Audio Processing: Suitable for audio applications due to their low noise and high dynamic range.
- Active Filters: Used in active filter designs for their high gain-bandwidth product and low distortion.
- Test Equipment: Employed in test equipment for their precision and reliability.
- Consumer Electronics: Commonly used in consumer electronics for their low cost and high performance.
Q & A
- What is the typical quiescent current of the OPA342NA/250?
The typical quiescent current is 150µA.
- What is the gain-bandwidth product of the OPA342 series?
The gain-bandwidth product is 1 MHz.
- What is the slew rate of the OPA342 series?
The slew rate is 1 V/µs.
- What is the operating temperature range of the OPA342NA/250?
The operating temperature range is from –40°C to +85°C.
- Can the OPA342 series operate on a single supply?
Yes, the OPA342 series can operate on a single supply as low as 2.5V.
- What is the input common-mode voltage range of the OPA342 series?
The input common-mode voltage range extends 300mV beyond the supply rails.
- What are the typical applications of the OPA342 series?
Typical applications include communications, PCMCIA cards, data acquisition, process control, audio processing, active filters, test equipment, and consumer electronics.
- What is the package type of the OPA342NA/250?
The package type is SOT23-5 surface mount.
- How does the OPA342 series handle input voltages beyond the rails?
Special precautions such as a Schottky diode clamp circuit may be required to prevent the op amp output from locking up if the input voltage goes sufficiently negative.
- Is a SPICE model available for the OPA342 series?
Yes, a SPICE macromodel is available for design analysis.
