Overview
The OPA1677DBVR is a single-channel, low-distortion audio operational amplifier produced by Texas Instruments. It is part of the OPA167x family, which includes the OPA1677, OPA1678, and OPA1679. These amplifiers are designed to offer high system-level performance, particularly in audio circuitry, with features such as low noise, low distortion, and high open-loop gain. The OPA1677DBVR is unity-gain stable and operates over a wide supply range, making it versatile for various audio applications.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Voltage Noise Density | 4.5 nV/√Hz | f = 1 kHz |
| Total Harmonic Distortion + Noise (THD+N) | 0.0001% (-120 dB) | f = 1 kHz, RL = 2 kΩ, VO = 3 VRMS |
| Open-Loop Gain | 114 dB | V– + 0.8 V ≤ VO ≤ (V+) – 0.8 V |
| Common-Mode Rejection Ratio (CMRR) | 110 dB | VS = ±2.25 V to ±18 V |
| Supply Voltage Range | ±2.25 V to ±18 V (or 4.5 V to 36 V) | |
| Quiescent Current (per channel) | 2 mA | IO = 0 A, TA = 25°C |
| Output Voltage Swing | (V–) + 0.8 V to (V+) – 0.8 V | RL = 2 kΩ |
| Slew Rate | 9 V/µs (G = –1) | |
| Full Power Bandwidth | 1.4 MHz | VO = 1 VP |
Key Features
- Low Noise and Distortion: The OPA1677DBVR features a low input voltage noise density of 4.5 nV/√Hz at 1 kHz and a total harmonic distortion plus noise (THD+N) of 0.0001% (-120 dB) at 1 kHz.
- High Open-Loop Gain and CMRR: It offers an open-loop gain of 114 dB and a common-mode rejection ratio (CMRR) of 110 dB.
- Rail-to-Rail Output Swing: The amplifier provides a rail-to-rail output swing to within 800 mV with a 2-kΩ load, increasing headroom and maximizing dynamic range.
- Wide Supply Range: The OPA1677DBVR operates over a wide supply range of ±2.25 V to ±18 V (or 4.5 V to 36 V) with a low quiescent current of 2 mA per channel.
- Unity-Gain Stability and Dynamic Behavior: It is unity-gain stable and exhibits excellent dynamic behavior over a wide range of load conditions.
- Phase Reversal Protection: The amplifier includes internal phase-reversal protection, preventing the output from reversing into the opposite rail when the input is driven beyond the linear common-mode range.
- ESD Protection: Built-in electrostatic discharge (ESD) protection circuits protect the device from accidental ESD events.
Applications
- Professional Audio Equipment: The OPA1677DBVR is suitable for use in professional audio equipment such as mixing consoles, audio processors, and high-end audio amplifiers.
- Consumer Audio Products: It can be used in consumer audio products like home theaters, soundbars, and high-fidelity audio systems.
- Medical and Industrial Equipment: The low noise and high precision of the OPA1677DBVR make it a good choice for medical and industrial equipment requiring high signal fidelity.
- Automotive Audio Systems: It is also applicable in automotive audio systems where high-quality audio performance is required.
Q & A
- What is the input voltage noise density of the OPA1677DBVR?
The input voltage noise density of the OPA1677DBVR is 4.5 nV/√Hz at 1 kHz.
- What is the total harmonic distortion plus noise (THD+N) of the OPA1677DBVR?
The THD+N of the OPA1677DBVR is 0.0001% (-120 dB) at 1 kHz with RL = 2 kΩ and VO = 3 VRMS.
- What is the open-loop gain of the OPA1677DBVR?
The open-loop gain of the OPA1677DBVR is 114 dB.
- What is the common-mode rejection ratio (CMRR) of the OPA1677DBVR?
The CMRR of the OPA1677DBVR is 110 dB.
- What is the supply voltage range of the OPA1677DBVR?
The OPA1677DBVR operates over a supply voltage range of ±2.25 V to ±18 V (or 4.5 V to 36 V).
- Is the OPA1677DBVR unity-gain stable?
Yes, the OPA1677DBVR is unity-gain stable.
- Does the OPA1677DBVR have phase reversal protection?
Yes, the OPA1677DBVR includes internal phase-reversal protection.
- What is the quiescent current of the OPA1677DBVR per channel?
The quiescent current of the OPA1677DBVR is 2 mA per channel at IO = 0 A and TA = 25°C.
- What is the slew rate of the OPA1677DBVR?
The slew rate of the OPA1677DBVR is 9 V/µs for a gain of –1.
- Does the OPA1677DBVR have built-in ESD protection?
Yes, the OPA1677DBVR has built-in electrostatic discharge (ESD) protection circuits.
