General Description

The MAX4684/MAX4685 low on-resistance (RON), low voltage, dual single-pole/double-throw (SPDT) analog switches operate from a single +1.8V to +5.5V supply.

The MAX4684 features a 0.5Ω (max) RON for its NC switch and a 0.8Ω (max) RON for its NO switch at a +2.7V supply. The MAX4685 features a 0.8Ω max on resistance for both NO and NC switches at a +2.7V supply.

Both parts feature break-before-make switching action (2ns) with tON = 50ns and tOFF = 40ns at +3V. The digital logic inputs are 1.8V logic-compatible with a +2.7V to +3.3V supply.

The MAX4684/MAX4685 are packaged in the chipscale package (UCSP)™, significantly reducing the required PC board area. The chip occupies only a 2.0mm ✕ 1.50mm area. The 4 ✕ 3 array of solder bumps are spaced with a 0.5mm bump pitch.

Features

♦ 12-Bump, 0.5mm-Pitch UCSP

♦ NC Switch RON

   0.5Ω max (+2.7V Supply) (MAX4684)

   0.8Ω max (+2.7V Supply) (MAX4685)

♦ NO Switch RON

   0.8Ω max (+2.7V Supply)

♦ RON Match Between Channels

   0.06Ω (max)

♦ RON Flatness Over Signal Range

   0.15Ω (max)

♦ +1.8V to +5.5V Single-Supply Operation

♦ Rail-to-Rail Signal Handling

♦ 1.8V Logic Compatibility

♦ Low Crosstalk: -68dB (100kHz)

♦ High Off-Isolation: -64dB (100kHz)

♦ THD: 0.03

♦ 50nA (max) Supply Current

♦ Low Leakage Currents

   1nA (max) at TA = +25°C

Applications

   Speaker Headset Switching

   MP3 Players

   Power Routing

   Battery-Operated Equipment

   Relay Replacement

   Audio and Video Signal Routing

   Communications Circuits

   PCMCIA Cards

   Cellular Phones

   Modems