UHF power LDMOS transistor

A 900 W LDMOS RF power transistor for broadcast Doherty and class AB transmitter applications. The excellent ruggedness of this device makes it ideal for digital and analog transmitter applications.


Whitepaper Doherty Architectures in UHF

This White Paper explains different PA architectures which can be used in today’s UHF Broadcast industry. 

In this paper a brief discussion will be given to explain these new Doherty architectures and to help customers finding the best solution for their transmitter. Ampleon’s transistor family BLF8XX can support these Doherty architectures.

Click here to download.

Features and benefits

  • Designed for symmetric and asymmetric Doherty operation
  • High efficiency
  • Integrated dual sided ESD protection
  • Excellent ruggedness
  • High power gain
  • Excellent reliability
  • Easy power control
  • Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous Substances (RoHS)


  • Broadcast transmitter applications in the UHF band
  • Digital broadcasting
  • Industrial, Scientific and Medical applications


Symbol Parameter Conditions Min Typ/Nom Max Unit
frange frequency range 470 860 MHz
PL(1dB) nominal output power at 1 dB gain compression 900 W
Test signal: DVB-T (8k OFDM)
VDS drain-source voltage 590-690 MHz [0] 50 V
Gp power gain 590-690 MHz [0] 18 dB
ηD drain efficiency 590-690 MHz [0] 33 %
PL(AV) average output power 590-690 MHz [0] 180 W
IMDshldr intermodulation distortion shoulder attenuation 590-690 MHz [0] -30 dBc
PAR peak-to-average ratio 590-690 MHz [0] 8 [1] dB

Package / Packing

Type number Package Outline version Reflow-/Wave
Packing Product status Marking Orderable part number,
(Ordering code (12NC))
sot539b_po Bulk Pack Active Standard Marking BLF898SU
(9349 600 34112)

Pinning info

Pin Symbol Description Simplified outline Graphic symbol
1 D1 drain1 (peak)
2 D2 drain2 (main)
3 G1 gate1 (peak)
4 G2 gate2 (main)
5 S source


Type number Orderable part number Chemical content RoHS / RHF Leadfree conversion date MSL MSL LF
Quality and reliability disclaimer

Ordering & availability

Type number Ordering code (12NC) Orderable part number Distributor Buy online Samples
BLF898S 9349 600 34112 BLF898SU DigiKey Buy Request samples

Design support

Title Type Date
PCB Design BLF898(S) (Data sheet) Design support 2018-08-20
BLF898 ADS-2016 Simulation model 2018-11-28