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AS1750-BWLT Datasheet(PDF) 2 Page - ams AG |
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AS1750-BWLT Datasheet(HTML) 2 Page - ams AG |
2 / 17 page AS1747, AS1748, AS1749, AS1750 Low-Vo ltage, Dual SPDT, A udio Clickless Switches with Negative Rail Capability www.austriamicrosystems.com/Analog-Switches/AS1747-50 Revision 1.02 1 - 16 Data sheet 1 General Description The SPDT (single-pole/double-throw) switches AS1747, AS1748, AS1749 and AS1750 allow signals below ground to pass through without distortion. These analog switches are ideal for switching audio signals, due to their supply voltage from +1.8V to +5.5V and their low 0.4 Ω on-resistance. An included comparator offers the AS1748 and AS1750 with headphone detection or mute/send key function. To reduce click-and-pop sounds when switching between pre-charged points the AS1749 and AS1750 have an internal shunt switch. This shunt switch auto- matically discharges any capacitance at the NO and NC connection points. This SPDT switch is available in space-saving 10-pin TDFN 3x3 packages and operate over the -40ºC to +85ºC extended temperature range. Figure 1. Typical Operating Circuit 2 Key Features ! Distortion -Free Negative Signal Throughput Down to VCC - 5.5V ! Comparator for Headphone or Mute Detection (AS1748/AS1750) ! Internal Shunt Resistor Reduces Click/Pop (AS1749/AS1750) ! Low On-Resistance (RON) 0.4 Ω at +2.7V Supply ! 0.25 Ω On-Resistance Flatness ! 0.03 Ω On-Resistance Matching ! +1.8V to +5.5V Supply Voltage ! -90dB Crosstalk (100kHz) ! -65dB Off-Isolation (100kHz) ! 0.01% Total Harmonic Distortion ! Available in 10-pin TDFN 3x3, 16-pin TQFN 3x3, and 12-Bump WL-CSP Packages 3 Applications The device is ideal for cell phones, PDAs and hand-held devices, notebook computers and MP3 players. Audio Source 1 Audio Source 2 Out+ Out- Out+ Out- CMPO NO2 NC2 NO1 NC1 Mute IN1 COM1 IN2 COM2 CMP- Mute Button V+ Shunt Switch + - 8 Ω Speaker Input Select V+/3 |
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