MADP-009989-14320T


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Product image for reference only. For precise specifications, refer to datasheet.

Manufacturer: MACOM Technology Solutions
Mfg #: MADP-009989-14320T
Richardson RFPD #: MADP-009989-143
Description: RF PIN Diode
Min/Mult: 1,000/1
Datasheet MADP-009989-143 Data Sheet
EDA/CAD Models

The MADP-009989 diode was designed to protect MRI receivers from high RF energy fields including long RF pulses and RF spike pulses present in most MRI machines. This diode acts as a passive protector (limiter) for the MRI receiver. No forward bias voltage is required to turn on the diode. It is self-biased by the RF transmitter pulse power. A switch driver is not needed for this receiver protection application.

Receiver protector diodes appear directly across the input port of the receiver. They are connected in anti-parallel pairs to limit the RF carrier excursion in both polarities. They must, therefore, exhibit extremely low insertion loss, both in the “on” state (high power present) and the “off” state (receiver power present) so as not to decrease the receiver’s sensitivity.

The MADP-009989 is ideally suited for MRI Receiver Protection and Body Coil Isolation.


Key Attributes Value Search Similar
Diode Configuration Single Diode
Minimum Frequency (MHz)
Maximum Frequency (MHz)
Vr (Reverse Voltage) (V) 75
Total Capacitance (pF) 1.2
Rs (Series Resistance) (Ω)
Package Type MELF
Mounting Style Surface Mount

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