Datasheet for the FSA550, a 4PST depletion-mode isolation switch with audio frequency range and adjustable oscillator frequency.
The FSA550 is a high-performance four-pole single-throw (4PST) normally closed depletion-mode isolation switch. It conducts signals when no VCC is present and isolates them when VCC is applied. The device operates over a wide VCC range and allows adjustment of the internal oscillator frequency between 500 kHz and 725 kHz in 75 kHz steps for EMI control.
Key specifications include an on-resistance of 0.8 Ω typical, THD+N of 0.002% typical, and operating temperature range from -40°C to +85°C. It is RoHS compliant and suitable for applications like MP3 players and cellular phones.
| On Resistance | 0.8 Ω typical |
|---|---|
| THD+N | 0.002% typical |
| Supply Voltage (OFF) | 1.6 V to 3.0 V |
The typical on-resistance is 0.8 Ω.
The THD+N is 0.002% typical.