AS1747 - austriamicrosystems AG

AS1747 Low-Voltage Dual SPDT Audio Clickless Switch

The SPDT (single-pole/double-throw) switch AS1747 allows signals below ground to pass through without distortion. This analog switch is ideal for switching audio signals, due to the supply voltage from +1.8V to +5.5V and the low 0.4Ω on-resistance. This SPDT switch is available in space-saving 10-pin TDFN 3x3 packages and operate over the -40ºC to +85ºC exte.

Features

! Distortion -Free Negative Signal Throughput Down to VCC - 5.5V Low On-Resistance (RON) 0.4Ω at +2.7V Supply 0.25Ω On-Resistance Flatness 0.03Ω On-Resistance Matching +1.8V to 5.5V Supply Voltage -90dB Crosstalk (100kHz) -65dB Off-Isolation (100kHz) Available in 10-pin TDFN 3x3 Packages ! ! ! ! ! ! ! 3 Applications The device is ideal for cell phones, PDAs and hand-held devices, notebook computers and MP3 players. Figure 1. AS1747 - Typical Operating Circuit Out+ Audio Source 1 Out- NC1 COM1 NO1 IN1 Input Select 8Ω Speaker AS1747 NC2 IN2 Out+ Audio Source 2 OutNO2 COM2 www.austri.