Muxing with MEMs

Analog Devices has introduced a series of 32-channel/dual 16-channel analog multiplexer ICs for telecom network systems.

The high channel count of the CMOS ADG725/ADG731 and the ADG726/ADG732 allows engineers to design systems that multiplex more channels – simplifying PC board layout, reducing the component count, and enabling designs that require less space.

The devices were designed for high-channel control circuits, such as MEMS mirror control circuits for optical switches, which have high port counts and large multiplexing requirements.

The ADG725/731 and ADG726/732 are suited to these applications because they allow a single control circuit to connect a higher number of channels without increasing board size and design complexity.

The new devices are all monolithic 32-channel/dual 16-channel analog multiplexers: The ADG725/731 have serially controlled three-wire interfaces that are compatible with SPI, QSPI, MICROWIRE, and multiple DSP interface standards.

The ADG726/732 have parallel interfaces and are controlled by 4-/5-bit binary address lines. The ADG731 and ADG732 switch one of 32 inputs to a common output. The ADG725 and ADG726 can be configured either as dual multiplexers that switch one of 16 inputs to a common output, or as differential multiplexers that switch one of 16 differential inputs to a differential output.

The devices operate from a single supply of 1.8 V to 5.5 V and +/- 2.5 V dual supplies.

The ADG726/732 parts are already available and the ADG725/731 parts will be released in June.

All products are available in 48-lead thin quad flat pack (TQFP) and chip scale (CSP) packaging.

The ADG726/732 are priced at $4.51 per unit in 1,000-piece quantities, and the ADG725/731 are priced at $4.59 per unit in 1,000-piece quantities.

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