Overview
The OPA1641AIDR, part of the OPA164x family from Texas Instruments, is a JFET-input, ultralow distortion, low-noise operational amplifier. This device is fully specified for audio applications and features a rail-to-rail output stage, providing high overall performance. The OPA1641AIDR is designed to deliver extremely low distortion, low noise, and low quiescent current, making it ideal for use in professional audio equipment, analog and digital mixing consoles, broadcast studio equipment, and high-end A/V receivers.
Key Specifications
| Parameter | Value |
|---|---|
| Slew Rate | 20 V/μs |
| Unity Gain Stability | Yes |
| No Phase Reversal | Yes |
| Quiescent Current per Channel | 1.8 mA |
| Output Stage | Rail-to-rail |
| Supply Voltage Range | ±2.25 V to ±18 V |
| Noise Density | 5.1 nV/√Hz |
| Total Harmonic Distortion + Noise (THD+N) | 0.00005% |
| Input Bias Current | 2 pA |
| Operating Temperature Range | –40°C to +85°C |
| Package Options | SOIC (8), VSSOP (8) |
Key Features
- Ultra-low noise and distortion, making it suitable for high-fidelity audio applications.
- Rail-to-rail output swing for increased headroom.
- High slew rate of 20 V/μs for fast signal response.
- Unity gain stable with no phase reversal.
- Low quiescent current of 1.8 mA per channel.
- Wide supply voltage range from ±2.25 V to ±18 V.
- Internal phase-reversal protection and output current limiting.
- Completely independent circuitry in dual and quad versions for minimal crosstalk.
Applications
- Professional audio equipment.
- Analog and digital mixing consoles.
- Broadcast studio equipment.
- High-end A/V receivers.
- High-end Blu-ray players.
- Active filter circuits, pre-amplifiers, and tone controls.
Q & A
- What is the slew rate of the OPA1641AIDR?
The slew rate of the OPA1641AIDR is 20 V/μs. - Is the OPA1641AIDR unity gain stable?
Yes, the OPA1641AIDR is unity gain stable. - What is the quiescent current per channel of the OPA1641AIDR?
The quiescent current per channel is 1.8 mA. - What is the output stage type of the OPA1641AIDR?
The output stage is rail-to-rail. - What is the supply voltage range of the OPA1641AIDR?
The supply voltage range is ±2.25 V to ±18 V. - What is the noise density of the OPA1641AIDR?
The noise density is 5.1 nV/√Hz. - What is the total harmonic distortion + noise (THD+N) of the OPA1641AIDR?
The THD+N is 0.00005%. - What is the input bias current of the OPA1641AIDR?
The input bias current is 2 pA. - What is the operating temperature range of the OPA1641AIDR?
The operating temperature range is –40°C to +85°C. - Does the OPA1641AIDR have phase-reversal protection?
Yes, the OPA1641AIDR has internal phase-reversal protection.
