Overview
The OPA1688IDRGR, produced by Texas Instruments, is a high-performance, single-supply, low-noise audio operational amplifier. It is part of the SoundPlus™ family and is designed to operate over a wide range of supply voltages from 4.5 V to 36 V. This device is notable for its stability into large capacitive loads, eliminating the need for a series output resistor in many applications. The OPA1688 offers low offset, drift, and quiescent current, along with wide bandwidth, fast slew rate, and high output current drive capability, making it an excellent choice for various general-purpose applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range | 4.5 V | - | 36 V | V |
| Quiescent Current per Amplifier | 1.6 mA | 1.8 mA | 2 mA | mA |
| Gain Bandwidth Product (GBP) | - | 10 MHz | - | MHz |
| Voltage Noise Density (en) | - | 8 nV/√Hz | - | nV/√Hz |
| Open-Loop Gain (AOL) | 108 dB | 130 dB | - | dB |
| Output Voltage Swing from Rail | (V–) + 0.1 V | (V+) – 0.1 V | - | V |
| Short-Circuit Current | ±75 mA | - | - | mA |
| Common-Mode Rejection Ratio (CMRR) | 90 dB | 104 dB | 120 dB | dB |
| Power-Supply Rejection Ratio (PSRR) | ±1 µV/V | ±2.5 µV/V | - | µV/V |
Key Features
- High Voltage Operation: The OPA1688 can operate on supplies ranging from 4.5 V to 36 V, making it versatile for various applications.
- Low Noise and Offset: Features low voltage noise density of 8 nV/√Hz and excellent offset drift of only 1.5 µV/°C.
- Wide Bandwidth and Fast Slew Rate: Offers a gain bandwidth product of 10 MHz and a fast slew rate, ensuring high performance in dynamic applications.
- High Output Current Drive: Capable of driving high capacitive loads without the need for a series output resistor.
- Phase-Reversal Protection: Internal phase-reversal protection prevents the output from reversing into the opposite rail when the input is driven beyond the linear common-mode range.
- EMI Rejection: Integrated electromagnetic interference (EMI) filtering reduces the effects of EMI from various sources.
- High CMRR and PSRR: Excellent common-mode rejection ratio and power-supply rejection ratio ensure robust performance in noisy environments.
Applications
- Audio Equipment: Suitable for professional and consumer audio equipment due to its low noise and high fidelity performance.
- Industrial Control Systems: Can be used in industrial control systems where high voltage operation and robust performance are required.
- Medical Devices: Applicable in medical devices that require high accuracy and stability, such as ECG and EEG machines.
- Aerospace and Defense: Its high performance and stability make it a good fit for aerospace and defense applications.
- Automotive Systems: Can be used in automotive systems that require high voltage operation and robust performance.
Q & A
- What is the supply voltage range of the OPA1688?
The OPA1688 can operate on supplies ranging from 4.5 V to 36 V.
- What is the quiescent current of the OPA1688?
The quiescent current per amplifier is typically 1.8 mA.
- What is the gain bandwidth product (GBP) of the OPA1688?
The GBP of the OPA1688 is 10 MHz.
- Does the OPA1688 have phase-reversal protection?
Yes, the OPA1688 has internal phase-reversal protection.
- How does the OPA1688 handle EMI?
The OPA1688 uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI.
- What is the common-mode rejection ratio (CMRR) of the OPA1688?
The CMRR of the OPA1688 is up to 120 dB.
- Can the OPA1688 drive high capacitive loads?
Yes, the OPA1688 can drive high capacitive loads without the need for a series output resistor.
- What is the short-circuit current of the OPA1688?
The short-circuit current of the OPA1688 is ±75 mA.
- In what packages is the OPA1688 available?
The OPA1688 is available in SOIC-8 and WSON-8 packages.
- What are some typical applications of the OPA1688?
The OPA1688 is suitable for audio equipment, industrial control systems, medical devices, aerospace and defense, and automotive systems.
