ADG739BRU

Analog Switches, Multiplexers, Demultiplexers Overview

The ADG739BRU is a CMOS analog matrix switch featuring a dual 4-to-1 multiplexer configuration within a 16-lead TSSOP package. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and utilizes a 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE standards. The device provides an on-resistance of 2.5 Ω typical (4.5 Ω maximum) with 0.75 Ω flatness. Key electrical parameters include 100 pA leakage currents, 20 µA maximum power supply current, and switching times of 32 ns (on) and 17 ns (off). It supports break-before-make switching action and includes a power-on reset function.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Dual 4-channel matrix switch architecture allowing independent control of eight switches via an 8-bit serial word.
• 3-wire serial interface compatible with standard digital signal processor and microcontroller protocols.
• Guaranteed break-before-make switching action prevents momentary shorting during channel transitions.
• Power-on reset ensures all switches initialize to the off state upon device activation.

Analog Switches, Multiplexers, Demultiplexers Applications

• Data acquisition systems
• Communication systems
• Relay replacement circuits
• Audio and video signal routing

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix against the manufacturer's current ordering guide to confirm temperature range and automotive qualification status. Confirm package availability and lead times through authorized distributors. Ensure ESD handling procedures are followed during assembly due to CMOS construction.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component for applications requiring low on-resistance and precise signal routing in space-constrained designs. The dual 4:1 configuration offers flexibility for complex switching matrices. Verify that the serial interface timing requirements align with the host microcontroller or DSP capabilities.

Analog Switches, Multiplexers, Demultiplexers Part Context

The ADG739 belongs to the ADG738/ADG739 family of low-voltage, serially controlled CMOS matrix switches. While the ADG738 provides a single 8-channel configuration, the ADG739 offers two independent 4-channel banks. Both share identical pinouts and control logic, differing primarily in internal connectivity.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Direct functional substitutes within the same series include the ADG738BRU for single-bank applications. Cross-family replacements may require interface adaptation. Verify pin compatibility and electrical specifications before substitution.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the ADG739 handle channel switching to prevent glitches?

The device employs a guaranteed break-before-make switching action. This ensures that the previous channel is fully disconnected before the new channel connects, preventing momentary shorts between inputs.

What is the function of the DOUT pin?

The DOUT pin outputs the data previously written to the input shift register. It allows multiple ADG738 or ADG739 devices to be daisy-chained on a single serial bus.

Can the ADG739 be used to expand chip select lines?

Yes, the dual 4-channel configuration can multiplex a single chip select line to address up to four separate serial devices on an SPI bus simultaneously.