AS1745 Analog Switch IC

Description

The AS1744/AS1745 are high-speed, low-voltage, dual single-pole/double-throw (SPDT) analog switches. Fast switching speeds, low ON-resistance, and low power-consumption make these devices ideal for singlecell battery powered applications.

These highly-reliable devices operate from a +1.8 to +5.5V supply, are differentiated by inverted logic, and support break-before-make switching.

With low ON-resistance (RON), RON matching, and RON flatness, the devices can accurately switch signals for sample and hold circuits, digital filters, and op-amp gain switching networks.

The devices are available in a 10-pin MSOP and a 10-pin TDFN 3x3mm package.

Key Features

• ON-Resistance:
  - 4Ω (+5V supply)
  - 5.5Ω (+3V supply)
• RON Matching: 0.2Ω (+5V supply)
• RON Flatness: 1Ω (+5V supply)
• Supply Voltage Range: +1.8 to +5.5V
• 1.8V Operation:
  - 9.5Ω ON-Resistance over Temperature
  - 38ns Turn On Time
  - 12ns Turn Off Time
• Current-Handling: 100mA Continuous
• Break-Before-Make Switching
• Rail-to-Rail Signal Handling
• Crosstalk: -90dB at 1MHz
• Off-Isolation: -85dB at 1MHz
• Total Harmonic Distortion: 0.1%
• Operating Temperature Range: -40 to +85ºC
• 10-pin MSOP Package and 10-pin TDFN 3x3mm

Applications

The devices are ideal for use in power routing systems, cordless and mobile phones, MP3 players, CD and DVD players, PDAs, handheld computers, digital cameras, and any other application where high-speed signal switching is required.

Block Diagram