AS1746 Analog Switch IC

Description

The AS1746 is a low on-resistance (RON), low-voltage, dual single-pole/double-throw (SPDT) analog switch designed to operate from a single +1.8 to +5.5V supply.

The device features a 0.5Ω (max) RON for normally closed (NC) switches and a 0.6Ω (max) RON for normally open (NO) switches using a +2.7V supply. Additionally the AS1746 offers excellent matching between channels of only 0.06Ω and the flatness over signal Range of 0.15Ω enables the device to provide a THD+N of only 0.025%.

The AS1746 features break-before-make switching (2ns) with tON = 50ns and tOFF = 30ns (using a +2.7V supply).

The digital logic inputs are 1.8V logic-compatible with +2.7 to +3.3V supplies.

The AS1746 is available in a TDFN-10 (3x3mm) package and a WL-CSP-10 package.

Key Features

• Single Supply Operation: +1.8 to +5.5V
• Normally Closed Switch RON: 0.45Ω (max, +2.7V Supply @ 25°C)
• Normally Open Switch RON: 0.55Ω (max, +2.7V Supply @ 25°C)
• RON Matching Between Channels: 0.06Ω
• RON Flatness Over Signal Range: 0.15Ω
• Supply Current: 50nA
• Rail-to-Rail Signal Handling
• 1.8V Logic Compatibility
• Low Crosstalk: -60dB (100kHz)
• High Off-Isolation: -64dB (100kHz)
• Total Harmonic Distortion: 0.025%
• Ultra-Low Leakage Currents: 1nA (@ TAMB = +25ºC)
• Package Types:
  • TDFN-10 (3x3mm)
  • WL-CSP-10

Applications

The device is ideal for audio headsets, MP3 players, power routing switches, relay replacements, audio and video signal routing, communications circuits, PCMCIA cards, mobile phones, MODEMs, and any battery-operated equipment.

Block diagram for AS1746 Analog Switch IC