PRELIMINARY FRD3500X230 3.5 GHZ WIMAX REFERENCE DESIGN (1 W) • PERFORMANCE (3.5 GHz) (802.16-2004 WiMAX Modulation) ♦ 30 dBm Typical Output Power, < 2.5% EVM ♦ 14 dB Typical Small-Signal Gain ♦ Class B Efficiency 14% (8V / 720 mA IDQ) ♦ > 48 dBm 3rd Order Intercept Point ♦ Low total components count • DESCRIPTION AND APPLICATIONS DEMO BOARD SIZE: 1 x 2 in. (2.54 x 5.08 cm.) CONNECTORIZED VERSION SHOWN The FRD3500X230 is a 2-stage, connectorized Reference Design that delivers a typical linear power of 30 dBm with the 802.16-2004 modulation, while maintaining less than 2.5% EVM. The design features a FPD4000AS driver stage, followed by a FPD10000AF power output stage. Both stages are dual-biased to allow a range of bias conditions on each stage, allowing operation from Class B to Class A. Board layout and components list are included. • ELECTRICAL SPECIFICATIONS AT 22°C Parameter Symbol Test Conditions Min Operating Bandwidth BW Class A / AB / B 200 MHz Small Signal Gain SSG Class A: VDS = 10V; IDQ = 1.6 A 14 dB Gain Flatness ∆G Class A: VDS = 10V; IDQ = 1.6 A ± 1.5 dB Center Frequency (adjustable) fCEN Nominal bias conditions Power at 1dB Gain Compression P1dB VDS = 10V; IDQ = 1.6 A 37.5 dBm G1dB VDS = 10V; IDQ = 1.6 A 13 dB Channel Power with 802.16-2004 2.5% max. EVM PCH Class AB Mode 31.0 31.5 dBm Channel Power with 802.16-2004 2.5% max. EVM PCH 29 30 dBm Power-Added Efficiency Eff Class AB Mode 10 % Class B Mode 14 3.4 Typ 3.5 Max Units 3.6 Class A - CW Single Tone Power Gain at dB Gain Compression Class A - CW Single Tone VDS = 10 V; IDQ = 1.25 A Class B Mode VDS = 8 V; IDQ = 730 mA typ. 802.16-2004 modulation Operating Current at 30 dBm PCH IOP VDD = 8.0 V; VGG = -1.20 / -0.89 V 0.9 A Nominal Drain Supply VDD All operating conditions Nominal Gate Voltages VGG For Class B Operation Total DC Power (operating) Phone: +1 408 850-5790 Fax: +1 408 850-5766 PTOT 8 V st -1.2 V nd VGG2 (2 Stage) -0.89 V Class B at PCH = 30 dBm 7.0 W VGG1 (1 Stage) http:// www.filtronic.co.uk/semis Revised: 8/10/05 Email: [email protected] PRELIMINARY FRD3500X230 3.5 GHZ WIMAX REFERENCE DESIGN (1 W) • RECOMMENDED OPERATING BIAS CONDITIONS Drain-Source Voltage: From 8V to 10V Quiescent Current: From 700mA (Class B) to 1.6A (Class A) • ABSOLUTE MAXIMUM RATINGS1 Parameter Symbol Test Conditions Drain Supply Voltage VDD Gate Supply Voltage Max Units -3V < VGS < +0V 12 V VGG 0V < VDD < +8V -3 V Operating Current IOP For VDS > 2V 1.8 A Gate Current IG Forward or reverse current +60/-15 mA RF Input Power 2 PIN Under any acceptable bias state 500 mW Channel Operating Temperature TCH Under any acceptable bias state 175 ºC Storage Temperature TSTG Non-Operating Storage 150 ºC Total Power Dissipation PTOT Ambient temperature to 85ºC 12 W Comp. Under any bias conditions 5 dB 2 or more Max. Limits 80 % Gain Compression 3 Simultaneous Combination of Limits 1 3 Min TAmbient = 22°C unless otherwise noted -40 2 Max. RF Input Limit must be further limited if input VSWR > 2.5:1 Users should avoid exceeding 80% of 2 or more Limits simultaneously Notes: • Operating conditions that exceed the Absolute Maximum Ratings could result in permanent damage to the devices. • HANDLING PRECAUTIONS To avoid damage to the devices care should be exercised during handling. Proper Electrostatic Discharge (ESD) precautions should be observed at all stages of storage, handling, assembly, and testing. This product has be tested to Class 1A (> 250V but < 500V) using JESD22 A114, Human Body Model, and to Class A, (< 200V) using JESD22 A115, Machine Model.. • APPLICATIONS NOTES & DESIGN DATA Recommendations on matching circuits is available from your local Filtronic Sales Representative or directly from the factory. User must ensure that proper bias sequencing is observed: Gate bias must be applied before Drain bias, and during power-down the Drain bias must be removed first. Phone: +1 408 850-5790 Fax: +1 408 850-5766 http:// www.filtronic.co.uk/semis Revised: 8/10/05 Email: [email protected] PRELIMINARY FRD3500X230 3.5 GHZ WIMAX REFERENCE DESIGN (1 W) • TYPICAL SMALL-SIGNAL PERFORMANCE: • TYPICAL CLASS AB / B CW PERFORMANCE: Table 2 Linearity under Class AB bias condition Phone: +1 408 850-5790 Fax: +1 408 850-5766 http:// www.filtronic.co.uk/semis Revised: 8/10/05 Email: [email protected] PRELIMINARY FRD3500X230 3.5 GHZ WIMAX REFERENCE DESIGN (1 W) TYPICAL CLASS A CW PERFORMANCE: Table 1 Power Sweep under Class A bias condition Phone: +1 408 850-5790 Fax: +1 408 850-5766 http:// www.filtronic.co.uk/semis Revised: 8/10/05 Email: [email protected] PRELIMINARY FRD3500X230 3.5 GHZ WIMAX REFERENCE DESIGN (1 W) All information and specifications are subject to change without notice. Phone: +1 408 850-5790 Fax: +1 408 850-5766 http:// www.filtronic.co.uk/semis Revised: 8/10/05 Email: [email protected]