32-channel 2:1 multiplexer — ultrasound beamforming switch matrix
The Microchip HV2808K6-G is a 32-channel 2:1 analog multiplexer/demultiplexer in a 56-VFQFN Exposed Pad package, designed for high-voltage ultrasound front-end switching. Each channel pairs two independent signal paths to a common output, routing transmit/receive elements in a medical imaging array. With a -3 dB bandwidth of 50 MHz and a maximum on-state resistance of 38 Ohms, the switch passes the fundamental and harmonic frequencies of a typical 2-15 MHz ultrasound transducer without significant attenuation or insertion loss that would degrade the echo signal-to-noise ratio.
Supply rail flexibility — single or dual ±40 V to ±160 V
The HV2808K6-G operates from a single 40 V to 200 V supply or a dual ±40 V to ±160 V supply. The wide voltage range lets the switch handle the full transmit pulse amplitude (often 100 Vpp or higher) without external level shifting or a dedicated high-voltage rail splitter. The 38 Ohm Rds(on) is specified at the rated supply voltage — the on-resistance stays flat across the signal swing because the internal charge pump holds the gate drive above the source rail. This keeps the insertion loss uniform across all 32 channels, critical for maintaining channel-to-channel matching in a phased-array receiver.
56-QFN package — thermal and board integration
The 56-VFQFN Exposed Pad (56-QFN 8x8 mm) provides a low-inductance ground plane under the die, reducing parasitic coupling between the high-voltage analog channels. Supplied in a Tray — the standard handling medium for QFN packages in production pick-and-place. The tray protects the fine-pitch leads from mechanical damage during transport and storage.
Sourced through independent distribution channels with full lot traceability. No pin-compatible second-source or direct Microchip successor is listed in the current product portfolio — the HV2808K6-G is the sole active order code for this 32-channel, 50 MHz, 38 Ohm switch configuration.