The ADG704BRMZ-REEL7 is a SPDT (Single Pole Double Throw) analog switch from Analog Devices in MSOP-8, with 2.5 Ohm on-resistance and 1.8-5.5V supply range. The device functions as a 2:1 multiplexer or 1:2 demultiplexer: when the A (address) pin is HIGH, S1A is connected to D1 (switch 1 closed); when A is LOW, S2A is connected to D2 (switch 2 closed). The EN (enable) pin must be HIGH for any switch to close; when EN is LOW, both switches are open (high impedance). The switch uses a CMOS transmission gate (parallel N-ch and P-ch MOSFETs) to achieve: (1) Rail-to-rail signal handling: the analog signal can swing from GND to VCC without distortion, because the N-ch handles signals near VCC and the P-ch handles signals near GND; (2) Constant on-resistance: the parallel combination of N-ch and P-ch maintains approximately 2.5 ohm across the full signal range, with Ron flatness of 0.5 ohm (important for avoiding distortion in audio and sensor signals). The off-leakage current is 0.5nA at 25C, and the charge injection is 1pC, minimizing switching transients in sample-and-hold circuits. The bandwidth is 200MHz, making it suitable for video and RF switching. The break-before-make switching prevents momentary shorting between S1A and S2A during transition. The -BRMZ-REEL7 suffix specifies MSOP-8, tape-and-reel. Applications include: audio source selection, battery/power source switching, and sensor multiplexing.