Product category:
Analogue and Mixed Signal ICs
News Release from: Vishay Siliconix | Subject: DG469 and DG470
Edited by the Electronicstalk Editorial
Team on 11 January 2008
Little resistance to analogue switch
upgrades
The DG469 and DG470 offer a very low 3.6ohm typical and 4.2ohm maximum on-resistance with typical flatness of 0.4ohm.
Vishay Intertechnology has two new high-voltage single- and dual-supply single-pole double-throw (SPDT) analogue switches The DG469 and DG470 devices are identical, except the DG470 provides an enable pin, which puts all of the switches in a high-impedance state, maintaining a "safe state" at power up and preventing accidental signal or power shorts
This article was originally published on Electronicstalk on 17 Jun 2003 at 8.00am (UK)
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The new switches are optimised for audio and video signal switching, sample and hold systems, precision data acquisition, relay replacement, and power routing in audio equipment, automatic test equipment, industrial equipment, communications systems, xDSL modems, automotive and avionics systems, and medical equipment.
For instrumentation and power routing, the DG470's enable pin disconnects both inputs and outputs, guaranteeing that signals and power are not connected until the enable pin is activated.
The enable pin can also be used as a quick "disconnect" function in the event of a fault condition, and provides a "mute" function for audio switching.
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The DG469 and DG470 offer a very low 3.6ohm typical and 4.2ohm maximum on-resistance with typical flatness of 0.4ohm.
Both devices are rated for 120mA continuous current, key for relay replacement and power routing.
The devices offer a 44V maximum supply voltage rating, and 57dB isolation at 1MHz.
The high-voltage devices are fully specified to operate with dual supplies at +/-5 and +/-15V or a 12V single supply, and offer an up to +/-15V analogue signal range on the outputs and inputs.
The switches operate with low power dissipation of 66uW.
They feature fast typical switching speeds of 129ns (turn-on) and 80ns (turn-off).
All digital inputs have 0.8 and 2.4V logic thresholds, ensuring low-voltage CMOS/TTL logic compatibility.
Each switch conducts equally well in both directions when on, and can handle an input signal range that extends to the supply voltage rails.
The devices are offered in a choice of MSOP-8 and SOIC-8 packages.
The DG469 is an improved upgrade for the Vishay Siliconix industry-standard DG419, reducing the on resistance (4.2 instead of 35ohm) and eliminating the need for a separate logic supply voltage.
The DG469 likewise serves as a pin-for-pin upgrade for the MAX4659 by offering much lower on resistance, dramatically lower power consumption, a higher switch current rating (120 rather than 30mA), and a wider temperature range.
Both devices are available in the standard and extended temperature ranges of -40 to +85 and -40 to +125C.
Samples and production quantities of the DG469 and DG470 SPDT analogue switches are available now, with lead times of six to eight weeks for larger orders.
Pricing for US delivery in 1000-piece quantities is $0.70 each.
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