Wireless Fidelity or “Wi-Fi” plays a major role in today’s communications by enabling constant connection in the 2.4 GHz and 5 GHz bands and broadband Internet access for users with laptops or devices equipped with wireless network interface while roaming within the range of fixed access points (AP) or a public hotspot.
The BFx840xESD product family is a series of discrete hetero-junction
bipolar transistors (HBT) specifically designed for high performance 5 GHz band low noise amplifier (LNA) solutions for Wi-Fi connectivity applications. BFx840xESD Transistors combine the 80-GHz fT silicon-germanium:carbide (SiGe:C) B9HFM process with special device geometry engineering to reduce the parasitic capacitance between substrate and transistor that degrades high-frequency characteristics. As a result, the BFx840xESD Series achieves 18 dB gain and best-in-class 0.96 dB noise figure in a 5 GHz band application circuit without input matching elements requiring only 8 passives in total.
BFx840xESD RF-Transistor Series allow engineers to increase the RF link budget and signal-to-noise ratio (SNR) of their AP routers and mobile stations when wider coverage areas are needed and especially when a higher order modulation scheme is used as in emerging very high throughput wireless specifications such as 256 quadrature amplitude modulation (QAM) in IEEE 802.11ac with more stringent SNR requirements for both the AP and the client.
The first B9HFM SiGe:C transistors are housed in the standard SOT-343 package (BFP840ESD), in the flat-lead TSFP-4-1 package (BFP840FESD) and in the low-height 0.3mm TSLP-3-9 package specifically fitting into modules (BFR840L3RHESD).
|
|
BFP840ED |
BFP840FESD |
BFR840L3RHESD |
|---|---|---|---|
|
Package |
SOT343 |
TSFP-4-1 |
TSLP-3-9 |
|
V CE0 [V] |
2.25 |
2.25 |
2.25 |
|
I cmax [mA] |
35 |
35 |
35 |
|
freq [GHz] |
5.5 |
5.5 |
5.5 |
|
G max at 10mA [dB] |
22.5 |
23 |
22 |
|
NF min at 5mA [dB] |
0.85 |
0.75 |
0.65 |
|
OP1dB at 10mA [dBm] |
5 |
5 |
5 |
|
OIP3 at 10mA [dBm] |
22 |
22 |
22 |
Table: Device level performance as measured in the test fixture
Target Applications:
BFx840xESD Series is specifically designed to be used as a 5-6 GHz low noise amplifier (LNA) for Wi-Fi 802.11 a/n/ac standards. Focus are Consumer products like WiFi access point (AP) routers and Wi-Fi modules.
Other possible applications include:
- Mobile and fixed connectivity applications: WiMAX and UWB
- Satellite communication systems, such as satellite radio (SDARs, DAB), navigation systems (e.g. GPS, Glonass) and C-band LNB (1st and 2nd stage LNA)
- Ku-band LNB front-end (2nd stage or 3rd stage LNA and active mixer)
- Ka-band oscillators (DROs)
Features
- High transition frequency f T = 80 GHz
- Best-in-class RF performance
- High maximum RF input power
- 1.5 kV HBM ESD hardness
- Inherently matched in the 5 GHz band
- Achieves highest gain (18dB) and best-in-class noise figure level (0.95dB) with only 8 external passives
- Low power consumption, ideal for mobile applications
- Low voltage supply capability e.g. VCC = 1.2 V and 1.8 V
- Available in standard, flat lead and ultra low height packages
Benefits
- Modelling competence: SPICE models and Microwave Office / ADS design kits
- Circuit layout/design support
- Abundant Distribution channels and sales offices worldwide