Silicon CapacitorsUBDC Series

Ultra Broadband surface mounted differential Si capacitor pairs

Ultra broadband smart products have been developped to keep pace with evolving optical communication market requirements and customers' feedbacks. With an on-going miniaturization and improved performances of optoelectronics circuitries, *Murata offers some smart solutions by integrating differential capacitor pairs, matched termination...into a single silicon passive device. This unique integration based on ultra deep trench MOS Silicon offers unique performances with low insertion loss, low reflection and phase stability up to 67 GHz. These capacitors are fully compatible with high speed automated pick-and-place manufacturing operations and are available with ENIG termination and with SAC305 pre-bump for 0402M case size.

* Murata Integrated Passive Solutions S.A.

Key features

  • Ultra broadband performance up to 67 GHz.
  • Resonance free allowing ultra low group delay variation.
  • Ultra low insertion loss thanks to an excellent impedance matching in transmission mode for UBB differential capacitor pair.
  • Low ESL and low ESR in bypass grounding mode for UBB matched termination.
  • High stability of capacitance value over temperature, voltage and aging. High reliability.
  • Straight forward assembly process.

(please refer to our assembly note for more details)

UBDC series Specification

Parameter Value
Capacitance range 5.6 nF to 10 nF(*)
Resistance range 50 Ω(*)
Capacitance tolerances ±15%(*)
Resistance tolerances ±10%(*)
Operating temperature range -55 to 150 °C
Storage temperature range - 70 to 165 °C(**)
Temperature coefficient +60 ppm/K
Breakdown Voltage (BV) 11 V, 30 V(****)
Capacitance variation versus RVDC 0.1 %/V (from 0 V to RVDC)
Insertion loss (IL) up to 60 GHz <0.9 dB
Return loss (RL) up to 60 GHz 12 dB
Capacitance insulation resistance 10 GΩ @ RVDC, @ 25°C, t>120s, for 10nF
Ageing Negligible, < 0.001% / 1000h
Reliability FIT<0.017 parts / billions hours
Capacitor thickness 100 μm
  • (*)Other values on request
  • (**)w/o packing
  • (***)e.g. 10 nF/0201M/BV 11V
  • (****)See the FAQ here for the relationship between breakdown voltage and rated voltage.

UBDC Series

Refer to this FAQ regarding the relationship between voltage tolerance and rated voltage.
See the FAQ here for the part numbering.

Assembly Note

Assembly Note Silicon Capacitor_Assembly by reflow (PDF: 1.6 MB)