Overview
The OPA1642AQDGKRQ1 is a dual, high-performance, JFET-input operational amplifier designed by Texas Instruments. It is part of the OPA164x-Q1 series, which is fully specified for audio applications. These operational amplifiers combine an ultra-low noise JFET input stage with a rail-to-rail output stage, providing high overall performance in audio circuits. The devices are particularly suited for use in automotive and other demanding audio environments due to their low distortion, low noise, and wide supply voltage range.
Key Specifications
| Parameter | Value |
|---|---|
| Input Noise Density | 5.1 nV/√Hz |
| Total Harmonic Distortion + Noise (THD+N) | 0.00005% (typical) |
| Input Bias Current | 2 pA (typical) |
| Quiescent Current per Channel | 1.8 mA (typical) |
| Supply Voltage Range | ±2.25 V to ±18 V |
| Output Voltage Range | Rail-to-rail output swing |
| Common-Mode Rejection Ratio (CMRR) | 120 dB (typical at 1 kHz) |
| Power-Supply Rejection Ratio (PSRR) | 120 dB (typical at 1 kHz) |
Key Features
- Ultra-low noise JFET input stage
- Rail-to-rail output stage for increased headroom
- Low total harmonic distortion + noise (THD+N) of 0.00005%
- Low input bias current of 2 pA
- Low quiescent current of 1.8 mA per channel
- Wide supply voltage range from ±2.25 V to ±18 V
- Unity-gain stable with excellent dynamic behavior
Applications
The OPA1642AQDGKRQ1 is ideal for various audio applications, including professional audio equipment, automotive audio systems, and any other high-performance audio circuits that require low noise and low distortion. Its wide supply voltage range and rail-to-rail output swing make it versatile for use in a variety of audio designs.
Q & A
- What is the input noise density of the OPA1642AQDGKRQ1? The input noise density is 5.1 nV/√Hz.
- What is the typical total harmonic distortion + noise (THD+N) of the OPA1642AQDGKRQ1? The typical THD+N is 0.00005%.
- What is the input bias current of the OPA1642AQDGKRQ1? The input bias current is 2 pA (typical).
- What is the quiescent current per channel of the OPA1642AQDGKRQ1? The quiescent current per channel is 1.8 mA (typical).
- What is the supply voltage range of the OPA1642AQDGKRQ1? The supply voltage range is from ±2.25 V to ±18 V.
- Is the OPA1642AQDGKRQ1 unity-gain stable? Yes, the OPA1642AQDGKRQ1 is unity-gain stable.
- What are the key features of the OPA1642AQDGKRQ1? Key features include ultra-low noise JFET input stage, rail-to-rail output stage, low THD+N, low input bias current, and low quiescent current.
- What are some typical applications of the OPA1642AQDGKRQ1? Typical applications include professional audio equipment, automotive audio systems, and other high-performance audio circuits.
- What is the common-mode rejection ratio (CMRR) of the OPA1642AQDGKRQ1? The CMRR is 120 dB (typical at 1 kHz).
- What is the power-supply rejection ratio (PSRR) of the OPA1642AQDGKRQ1? The PSRR is 120 dB (typical at 1 kHz).
