MAX4547ESE

Analog Switches - Special Purpose Overview

The MAX4547ESE is a low-voltage, bidirectional RF/Video switch IC containing two single-pole/double-throw (SPDT) switches. It operates with dual supplies from ±2.7V to ±6V or a single supply between +2.7V and +12V. The device features a maximum on-resistance of 20Ω, matched within 1Ω, and flatness of 0.5Ω at ±5V. It provides a -3dB bandwidth of 300MHz, off isolation of -82dB at 10MHz, and crosstalk of -84dB at 10MHz. Turn-on time is typically 150ns, and turn-off time is typically 100ns. The component is housed in a 16-pin Narrow SOIC package and supports an operating temperature range of 0°C to +70°C.

Analog Switches - Special Purpose Feature Summary

• Bidirectional signal routing for RF and video applications
• TTL and CMOS logic compatibility
• Rail-to-rail analog signal handling

Analog Switches - Special Purpose Applications

• RF switching
• Video signal routing
• High-speed data acquisition
• Test equipment
• ATE equipment

Analog Switches - Special Purpose Procurement Notes

Verify the specific suffix 'E' confirms the commercial temperature range of 0°C to +70°C. Confirm the package designation matches the 16-pin Narrow SOIC form factor. Ensure the ordering information aligns with the manufacturer's current production status and lead times before finalizing procurement plans.

Analog Switches - Special Purpose Selection Notes

Select this part when dual SPDT switching is required for signals up to 300MHz. It is suitable for systems requiring low insertion loss and high off-isolation. Consider the ±5V optimized performance for best linearity and speed. Verify that the single-supply operation constraints do not conflict with the system's ground-referenced signal requirements.

Analog Switches - Special Purpose Part Context

The MAX4547ESE belongs to the MAX4545/MAX4546/MAX4547 family of low-voltage T-switches. While the MAX4545 contains four SPST switches and the MAX4546 contains two dual SPST switches, the MAX4547 specifically integrates two SPDT switches. All members share similar electrical characteristics and construction techniques.

Analog Switches - Special Purpose Replacement Considerations

MAX4547EEE+ offers the same functionality in a QSOP-16 package with an extended temperature range of -40°C to +85°C.

Analog Switches - Special Purpose FAQ

How does the MAX4547 handle rail-to-rail analog signals?

The switches are constructed in a T configuration using paralleled N-channel and P-channel MOSFETs, allowing them to handle analog signals ranging from V- to V+ in either direction.

What is the impact of single-supply operation on performance?

Single-supply operation limits AC signals to -0.3V due to internal ESD diodes. Performance metrics such as switching speed, on-resistance, off-isolation, and distortion degrade significantly compared to the optimized ±5V dual-supply operation.

Why are separate GND_ pins provided for each switch?

Separate ground pins are not internally connected to improve high-frequency performance and provide flexibility. They allow individual switches to be referenced to different potentials if necessary, though they should typically be connected to a common ground plane.