Analog switches minimize return signal attenuation

Sunnyvale, Calif. — Supertex Inc.'s eight-channel analog switch ICs feature robust latch-up protection and a quiescent current of 10 microamps.

Supertex's HV2201 and HV2301 switch ICs are said to provide improved operating efficiency in applications that require high voltage analog switching controlled by low voltage signals, such as medical ultrasound imaging, non-destructive metal-flaw detection, and other piezoelectric transducer driving.

Additionally, the HV2301 features integrated bleed resistors that not only minimize noise but also reduce printed-circuit board spacing requirements, said Ahmed Masood, Supertex's vice president of marketing.

Additional features include 22-ohm switch resistance that minimizes return signal attenuation, serial shift register control to reduce I/O connections, and up to 200-volt operating voltage for higher transmit voltages and deeper imaging capability.

The devices combine high voltage bilateral DMOS switches and low power CMOS
logic to provide efficient control of high voltage analog signals.

See related block diagram

The HV2201 and the HV2301 are available in 28 pin PLCC, 32 pin BCC, and 48 pin TQFP packages (HV2201PJ-G, HV2301PJ-G, HV2201B1-G, HV2301B1-G,
HV2201FG-G, and HV2301FG-G, respectively).

Pricing is $10.11 for the HV2201PJ-G, $10.61 for the HV2301PJ-G, $12.33 for the HV2201B1-G, $12.95 for the HV2301B1-G, $11.12 for the HV2201FG-G, and $11.68 for the HV2301FG-G — all in 1K quantities. Click here for the HV2201 data sheet. Click here for the HV2301 data sheet.

Supertex , 1-408-222-8888,

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