Pacific Wireless C2304.. 2844 Mar Vista Dr. Suite 101 Aptos, CA 95003 TEL (831) 684-2474 FAX (831) 684-2494 www.pacwireless.com DATA SHEET MMDS / ISM / S-Band Downconverter 1800 to 4800 MHz Operation RF IN Features • • • • • • • 1800 to 4800 MHz RF 10 to 900 MHz IF 26 dB Gain, 4dB Noise Figure Single 5V Supply 27 dBm Output IP3 Separate RF AMP, MIXER/LO AMP and IF AMP cells. 75 ohm IF output impedance VDD LO IN IF OUT RF OUT IF/RF IF IN IF BIAS Applications • • • • • • • • • • 2.4 GHz ISM Band Applications MMDS Downconverters Wireless Bridges Wireless Local Loop Systems S Band Receivers Wireless LANS and WANS Point to Multipoint Receivers 2.4GHz Consumer Applications Bluetooth Applications Upconverters Description The C2304 is a flexible high intercept and high gain down conversion GaAs MMIC packaged in a compact 14 pin SOIC package. Each sub-circuit is brought out on separate pins to allow for custom filtering on the IF/RF mixer interstage or custom matching for specific bands. Broadband parallel feedback networks are used on the gain and LO driver stages and the mixer is a singly balanced, two diode type mixer. The FET source of the IF amplifier stage (IF BIAS) is accessible for AC bypassing which allows for current reduction with DC source degeneration. The gain and DC current is broken up as follows: RF AMP gain = 14dB, current = 22 mA; LO AMP gain = 11dB, current = 28ma; IF AMP gain = 18dB, current = 60 mA, MIXER conversion loss = -6dB. Simple external matching circuits can be implemented for all ports to achieve VSWR’s <2:1 over moderate bandwidths of less than 400MHz. Electrical Characteristics Typical Specifications for VDD=5.0V TA=+25oC Minimum and Maximum specifications are guaranteed over RF range 2.5GHz – 2.68GHz Tested in 50Ω input / 75Ω output system, LO=2.278GHz at 5dBm, using matching circuit shown on page 3. Parameter Conversion Gain Single Sideband Noise Figure Output IP3 RF Input Return Loss IF Output Return Loss Symbol G NF IP3 S11 S22 Conditions LO=5dBm LO=2.278GHz LO=5dBm 50Ω input ref. 75Ω output ref. Min Typ Max Units 24.7 26 4 27 -12 -11 27.3 dB dB dBm dB dB C2304 Page 2 LO Input Return Loss Output Power at 1dB Comp. Operating Drain Current RF OUT to IF/RF Isolation LO IN to IF OUT Isolation LO IN to RF IN Isolation Load VSWR for Input/Output Stability1 Thermal Resistance 1 S11 P1dB IDD ISOr-i ISOl-i ISOl-r VSWR 50Ω input ref. LO=5dBm LO=5dBm LO=5dBm LO=5dBm With network on page 3 θJC Junction to GND lead -2 17 110 32 13 24 10:1 dBm dBm mA dB dB DB 75 °C/W As a separate circuit the IF AMP is conditionally stable for VSWR < 5:1 over 1.5-3.6GHz Typical Performance Characteristics (Obtained using external circuit shown on p. 3) Conversion Gain vs. Temperature LO = 2.278GHz @ 5dBm 30 +25C +85C -40C 29 26 IP3 (dBm) 28 27 26 Gain (dB), Gain (dB) Conversion Gain and Output IP3 vs. LO Power F1=2.59 GHz and F2=2.596 GHz 28 25 24 22 IP3 Conv. gain 20 24 18 23 16 22 2.45 2.5 2.55 2.6 2.65 -6 2.7 -4 -2 IF Output Return Loss in 75 ohms LO = 5dBm 0 0 2 4 6 8 10 LO Power (dBm) RF Freq (GHz) RF Input Return Loss and RFOUT to IF/RF Isolation 0 Return Loss , Isolation (dB) -5 Return Loss (dB) -5 -10 -15 -20 RF Input Return loss RFout to RF/IF Isolation -10 -15 -20 -25 -30 -25 200 -35 220 240 260 280 300 320 340 360 380 400 420 2.5 2.55 Freq (MHz) 2.6 2.65 2.7 Freq (GHz) Absolute Maximum Ratings Characteristic Drain Voltage Bias Current RF Input Power Power Dissipation Load VSWR Operating Temperature Junction Temperature Storage Temperature Range Symbol Value Units VDD1,2 IDS PIN PDISS VSWR TOP TJ TSTG +8 200 +18 1.0 10:1 -40 to +85 150 -65 to +150 V mA dBm W °C °C °C Caution: Operating beyond specified rating for any of these parameters may cause permanent damage to the device. Specifications Subject to Change Without Notice C2304Spec Rev 6 12/30/99 C2304 Page 3 Application Information L2 C9 C8 LO IN 1 14 2 13 3 4 5 RFIN TRL1 C2 C2304 PM2117 VDD IF AMP +5V Part C5 C2 C3 C4,C9 C6 C7 C8 L1 L2 TRL1 TRL2 TRL3 IF OUT L1 12 C7 11 C6 10 6 9 7 8 TRL2 C3 C5 TRL3 Value/Type 33pF NPO 1pF NPO 0.5pF NPO 0.1uF X7R 1.8pF NPO 270 pF NPO 1000pF X7R 39 nH 560 nH θ = 30°, Z0=110Ω θ = 23°, Z0=110Ω θ = 28°, Z0=110Ω Size 0603 0603 0603 0603 0603 0603 0603 0805 1008 @2.5GHz @2.5GHz @2.5GHz VDD +5V C4 Matching/Diplexing Circuit for 2.5 to 2.68 GHz Operation. Recommended LO IN Port Matching The LO IN port of the C2304 can be matched into 50 ohms with a lossy network. At 3dBm drive, the unmatched port is at Z = 5 –15j ohms at 2.278 GHz. Also of note is that this impedance varies somewhat with the LO drive level. Therefore a narrow band high Q network is not recommended due to inherent manufacturing variation in LO drive available. The simple network below matches this port over an ~ 10% bandwidth. TRL 1 LO Source 50 ohm LO IN Pin 2 R1 C1 Test Board Layout VDD IF AMP VDD C230X Material : GETEK .028” Specifications Subject to Change Without Notice IF OUT Value/Type 1.8pF NPO 4.3 Ω θ = 21°, Z0=110Ω Size 0603 0603 @2.5GHz Biasing and Electrical Ground/ Thermal Considerations LO IN RF IN Part C1 R1 TRL1 Pins 3,4,5,10 and 12 should have ground vias straddling both sides of the pin solder contact. This insures good electrical and thermal grounding. If the IF AMP is run at Idss (DC Grounded IF BIAS pin 14), this pin should be grounded as described above. It is recommended that a continuous ground plane be present under the package to lower pin impedance and maintain similarity with the matching environment used in the schematic in the Application Information section. Bias for the IF amplifier is supplied thru IF OUT pin 14. All ports are DC coupled to the IC. Pins 2,6 and 13 should be kept at 0V DC to maintain proper gate voltages. Pin 9 is internally biased at 5V under normal operation and requires an external DC block. C2304Spec Rev 6 12/30/99 C2304 Page 4 Package Specifications Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Advantages of GaAs MMIC Notes: • • Function IF OUT LO IN GND GND GND RF IN VDD GND RFOUT GND IF/RF GND IF IN IF BIAS Standard packaging is 14L SOIC tube. Tape and Reel available upon request. All shipments F.O.B. Pacific Wireless Aptos, CA 95003 RF Integration – Less Components/Board Space Good Device Matching – No Tweaks – Less Tuning Great power efficiency at low voltage Better Linearity and Distortion Performance Superb Radiation Immunity No Latent or Cummulative ESD effects No Infant Mortality; No “Walking Wounded” No Burn-in Necessary Part Numbers: Part Number C2304 C2304TR Description 1800 to 4800 Downconverter – Tube 1800 to 4800 Downconverter – Tape and Reel For further information contact: Pacific Wireless 2844 Mar Vista Dr. Suite 101 Aptos, CA 95003 TEL (831) 684-2474 FAX (831) 684-2494 www.pacwireless.com Specifications Subject to Change Without Notice C2304Spec Rev 6 12/30/99