12:8 crosspoint switch with 210 MHz analog bandwidth
The ADG2128YCPZ-REEL7 is a 12:8 crosspoint switch array — any of 12 inputs can be routed to any of 8 outputs under I²C control, making it a full non-blocking matrix rather than a simple multiplexer. The 210 MHz -3 dB bandwidth means this part passes analog signals well into the VHF range — suitable for ultrasound transducer beamforming, telecom baseband routing, or video signal switching where signal integrity above 100 MHz matters.
On-resistance and signal path loss
Maximum on-state resistance is 50 Ohm — this sets the insertion loss through the switch. For a 50 Ohm system, the switch adds roughly 6 dB of attenuation in the signal path; for higher impedance loads the loss drops proportionally. The single 12 V supply or dual ±5 V rails give flexibility to match the analog signal swing. With ±5 V the switch handles bipolar signals up to the supply rails, useful for ultrasound echoes that swing below ground.
Package and rework considerations
The exposed pad needs a solder paste stencil opening that matches the datasheet footprint; under the hot-air station the part reflows evenly if the pad is properly tinned. Pin 1 is marked by a chamfer on the top-left corner of the package. The 0.5 mm pitch QFN lands are on the bottom; alignment under reflow is self-centering if the paste deposit is consistent across all 32 pads.
The wide range also suits automated test equipment where the switch sits near a heated device interface. Listed applications include telecommunications and ultrasound — both require the 210 MHz bandwidth and the non-blocking matrix topology to route multiple analog channels without crosstalk between paths.
ROHS3 compliant per the manufacturer's declaration — no restricted substances above the threshold limits for EU and global markets.