Description

The Intersil ISL43840IRZ is an analog multiplexer and demultiplexer designed to provide maximum performance, accuracy, and reliability in battery-powered, handheld, medical, and audio/video devices. The model is a low-voltage, single and dual supply, 8 to 1 multiplexer and differential 4 to 1 multiplexer. The device can operate from a single +2V to +12V supply or from a ±2V to ±6V supplies. The multiplexer has an inhibit pin to simultaneously open all signal paths and a latch bar pin to lock in the last switch address for user convenience.

Specifications and features

The ISL43840IRZ is fully specified at 3.3V, 5V, ±5V, and 12V supplies for 10% tolerances. The ON Resistance (RON) max, VS = ±4.5V. is 50Ω and the ON Resistance (RON) max, VS = +3V is 155Ω. The RON matching between channels, VS = ±5V is less than 2Ω. The device has a low charge injection, VS = ±5V of 1pC (max).

The analog multiplexer and demultiplexer operate on both single and dual supplies. The single supply operation ranges from +2V to +12V, while dual supply operation ranges from ±2V to ±6V. The device has fast switching action, with tON at 38ns and tOFF at 19ns (VS = +5V). Maximum off-leakage is guaranteed at 2.5nA, and break-before-make is guaranteed. The device is also TTL and CMOS compatible.

Pb-Free Plus Anneal is available, and this device is RoHS compliant.

Application Scenarios

The ISL43840IRZ can be used in various handheld and portable devices and communication systems such as handheld radios, ADSL, VDSL modems, and telecom infrastructure. Medical devices such as magnetic resonance image (MRI) and CT and PET scanners can also benefit from using this device. Various circuits that benefit from this multiplexer include sample and hold circuits, operational amplifier gain switching networks, high frequency analog switching, high speed multiplexing, and integrator reset circuits.

Comparison

• Low Voltage Operation: The device can operate from a single +2V to +12V supply, which enables it to work in low voltage battery-powered and portable applications.
• Reliability: The device has a maximum guaranteed off-leakage of 2.5nA, and break-before-make is also guaranteed. The device is also TTL and CMOS compatible and has a low charge injection of 1pC (max).
• Fast Switching Action: The tON and tOFF time, when VS = +5V, is 38ns and 19ns, respectively, which enables high switching frequencies and fast response times.
• Pb-Free Plus Anneal Available: The device is RoHS compliant and is available with Pb-free and anneal options.

• The device has a maximum RON of 50Ω (VS = ±4.5V) and 155Ω (VS = +3V), which for some high-precision applications may not be ideal.