New Release of the MUSES8921 Series, a High Quality Sound, J-FET Input Dual Audio Operational Amplifier
- Audio Operational Amplifier Offering "Real Pure Sound" of Heartquake -
Nisshinbo Micro Devices Inc.（NISD） released the MUSES8921 series, a high quality sound, J-FET input dual audio operational amplifier for use in audio applications.
This product is the standard model of the MUSES series. It features J-FET input and represents the culmination of our operational amplifier design technology and experience, both refined over approximately 50 years, in pursuit of reproducing the original sound with the utmost fidelity.
We have employed analog technology dedicated to faithfully reproducing delicate sounds—from musical nuances and atmosphere to the very expression of silence. Rather than relying solely on numerical specifications, we have conducted rigorous listening evaluations, achieving an ideal performance that meets the expectations of those who genuinely love sound.
Key features include the following：
● Input Noise Voltage (Noise Characteristics): 8.0 nV/√Hz typ (at f = 1 kHz)
● Gain Bandwidth Product: 11.0 MHz typ
● Total Harmonic Distortion: 0.0004% typ
● High Slew Rate: 25 V/μs typ
● Low Input Bias Current: 5 pA typ
These characteristics make it ideal for a variety of high-quality audio applications, such as audio preamplifiers, reference amplifiers, active filters, line amplifiers, and I/V converters.
MUSES is our brand of audio semiconductor devices committed to pursuing high-quality sound. These products are unique in the world, based on the following concept:
1. Pursuing high-fidelity sound
2. Pursuing sound true to the original, free from coloration, exaggeration, or loss
3. Pursuing sound that resonates with the senses beyond numerical expression
Features
1. J-FET Input Type of the MUSES Standard Model, Pursuing High-Quality Sound
This product is based on MUSES8920/A, which has received high praise for its sound quality. The product employs the high-quality sound technologies cultivated during the development of the MUSES flagship models. We have achieved improved sound quality by thoroughly reviewing and optimizing the signal and power path designs, as well as the placement of elements.
2. Optimal Audio Characteristics for I/V Converters
In addition to its low noise, low distortion, and high slew rate, its low input bias current characteristic, which is inherent to J-FET inputs, enables outstanding performance in I/V converter applications.
3. Compact, High-Heat-Dissipation Package (DFN)
The product uses a compact DFN package, enabling it to be mounted in limited spaces. This feature enhances the downsizing of application systems and increases design flexibility. Furthermore, its excellent heat dissipation performance enables stable operation even at high output power levels, supporting a reliable design.
Product Photo
MUSES8921 (left: EMP-8-AN, right: DFN4035-8-GR)
Applications
● PC Audio, Desktop Audio
● Portable Audio Player
● Portable Headphone Amplifier
● Car Audio
● Professional Audio
Main Specifications
| Items | MUSES8921AN | MUSES8921GR |
| Package | EMP-8-AN 3.9 × 5.0 × 1.65 mm |
DFN4035-8-GR 4.0 × 3.5 × 0.75 mm |
| Number of Circuits | 2 | Same as Left |
| Operating Voltage Range | ±3.5 V to ±17 V | Same as Left |
| Input Noise Voltage | 8.0 nV/√Hz typ. at f = 1 kHz | Same as Left |
| Total Harmonic Distortion | 0.0004% typ. at f = 1 kHz | Same as Left |
| Gain Bandwidth Product | 11 MHz typ. | Same as Left |
| Slew Rate | 25 V/μs typ. | Same as Left |
| Input Bias Current | 5 pA typ. | Same as Left |
| Unity-Gain Stable | Yes | Same as Left |
| J-FET Input | Yes | Same as Left |
| Bipolar Technology | Yes | Same as Left |