1. Product Overview:

️· What it is: A non-reflective, absorptive SPST (Single-Pole, Single-Throw) AlGaAs PIN diode switch. Essentially, it's an electronic switch for radio frequency (RF) signals.
️· Application: Intended for use in applications requiring switching between two signal paths, often in test equipment, radar, or communication systems.
️· Key Feature: Absorptive switching – when in the isolation state, it absorbs the signal, providing a good 50-ohm match at the output port.

2. Electrical Characteristics (Key Values):

️· Operation: Requires external bias network and DC return plane.
️· Low Loss State: Achieved by forward biasing one diode with a -10mA current at DC Bias 1 and biasing another diode at 0V at DC Bias B.
️· Isolation State: Achieved by forward biasing the other diode at DC Bias B1 and DC Bias B (series diode becomes reverse biased).
️· Typical Forward Voltage (Vf): ~1.35V at 10mA and 25°C.
️· Switching Speed: Not explicitly stated but implies relatively fast switching due to PIN diode technology.
️· Isolation: > 30 dB RF to DC isolation from the bias network.

3. Mechanical Details:

️· Package: Waffle Pack (die form – not a surface-mount package)
️· Die Size: Dimensions are provided in mils and mm, (e.g., A: 44.9 - 46.9 mils)
️· Thickness: 3.5 - 4.5 mils.
️· Bonding Pads: Locations are indicated in yellow on a diagram.

4. Ordering Information:

️· Part Number: MA4AGSW1A

5. Key Operational Notes and Recommendations:

️· Bias Network: A crucial element for proper operation. The datasheet provides a schematic for a bias network designed for 10-30 GHz operation.
️· DC Return Plane: Essential for grounding and minimizing noise.
️· Matching: When in the isolation state, good 50-ohm matching is achieved at Port J2, preventing signal reflections.
️· Driver Connections: (Table provided)
- Low Loss: DC Bias 1 = -10mA, DC Bias B = 0V
- Isolation: DC Bias 1 = +10mA, DC Bias B = +10mA



Important Considerations (from the datasheet):

️· This is a die (bare chip) – not a packaged device. It requires integration into a circuit board and requires careful handling.
️· External components are required for biasing and operation.
️· Proper grounding and bias network design are critical for optimal performance and isolation.
️· The datasheet provides a schematic, but specific bias network components will need to be selected based on the system's voltage requirements and frequency range.