SMP1304 Series
Low-Distortion Attenuator Plastic Packaged PIN Diodes

The SMP1304 series of plastic packaged, surface mountable, low capacitance (0.3 pF) silicon PIN diodes is designed for attenuator applications from 5 MHz to beyond 2 GHz.

The thick 100 μm I region of these PIN diodes makes them very attractive for use in low-distortion PI and TEE attenuators commonly found in TV distribution applications.

The 1 μs typical carrier lifetime of these diodes results in a resistance of 20 Ω maximum at 1 mA and 7 Ω maximum at 10 mA.

The SMP1304 series is available in a selection of plastic packages: as a single diode in a small footprint SOD-323 package, and in a variety of configurations in an SOT-23 package, including the low inductance (0.4 nH) SMP1304-007.

The SMP1304-019, a three-diode junction designed for insertion in PI attenuators, is available in an SOT-143 package. The SMP1304-027 is available in an SOT-5 package as a fourdiode array designed for insertion in commonly used four-diode PI attenuator circuits.


  • Low-distortion design
  • Frequency range from 5 MHz to >2 GHz
  • Designed for base station applications
  • Configured for PI and TEE attenuators
  • Packages rated MSL1 @ 260 °C per JEDEC J-STD-020
Data Sheets SMP1304 Series: Low-Distortion Attenuator Plastic Packaged PIN Diodes SMP1304_Series_200044Q.pdf (685 KB)
Application Notes Circuit Models for Plastic Packaged Microwave Diodes 200311A.pdf (190 KB)
Application Notes A Wideband General Purpose PIN Diode Attenuator 200313B.pdf (473 KB)
Application Notes 5-6 GHz Switch Using Low-Cost Plastic Packaged PIN Diodes 200321A.pdf (450 KB)
Application Notes Design With PIN Diodes Design_With_PIN_Diodes_200312D.pdf (683 KB)
Application Notes Solder Reflow Information Solder_Reflow_Info_200164C.pdf (109 KB)
Designer Info SMP1304: ADS 2002C Models (WinZip File) (51 KB)
ProductName : SMP1304 Series
Frequency (GHz) Min. :
Frequency (GHz) Max. :
Min. VB IR = 10 µA (V) : 200
Description :
CT VR = 30 V (pF) : 0.30 Max.
Insertion Loss at Min Control (dB) Max. :
Attenuation Range at Max Control
(dB) Typ. :
Input IP3 (dBm) Min. :
Control Input Range :
VF IF = 10 mA (V) : 0.80 Typ.
RS IF = 1 mA F = 100 MHz (Ω) : 50 Max.
RS IF = 10 mA F = 100 MHz (Ω) : 7 Max.
RS IF = 100 mA F = 100 MHz (Ω) : 2.0 Max.
Typical Carrier Lifetime IF = 10 mA (ns) : 1000
Package :
Package (mm) :
Product Information:
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