The document introduces ROHM's BD88xxxGUL series headphone amplifiers, which are designed with no output coupling capacitor, with an output voltage range of +2.4V to +5.5V, no need for a large-capacity output coupling capacitor, no influence of output load resistance on low-frequency response, virtual ground-referenced output, low distortion and low power consumption, integrated negative power supply, integrated short-circuit protection and thermal overload protection, and small package.
The ROHM BD88200GUL family provides coupling‑capacitor‑less headphone amplifiers with built‑in negative voltage generation, virtual‑ground output and low‑THD performance. The devices operate from a single supply (2.4 V to 5.5 V) and eliminate bulky DC‑blocking capacitors, reducing board space and cost.
The note includes absolute maximum ratings, operating conditions, detailed electrical characteristics, and typical application circuits for mobile phones, audio players, TVs and other consumer electronics. Package information (VCSPSOL2, 2.1 mm × 2.1 mm) and gain‑setting options for each part are also provided.
| Supply Voltage Range | 2.4 V – 5.5 V |
|---|---|
| Operating Temperature Range | -40 °C – +85 °C |
| Maximum Output Power | >30 mW |
| THD+N (typ.) | 0.008 % |
| Package | VCSPSOL2 (2.1 mm × 2.1 mm) |
The BD88215GUL provides a gain of –1.5 V/V.
The devices operate from 2.4 V to 5.5 V single‑supply.
Yes, a virtual‑ground function is embedded in the IC.
They are offered in a VCSPSOL2 package measuring 2.1 mm × 2.1 mm.