MICROWAVE CORPORATION HMC235QS16G v01.0801 1 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz ATTENUATORS - SMT 2 Typical Applications Features The HMC235QS16G is ideal for: Wide Bandwidth: DC - 4 GHz • Cellular Attenuation Bits: 1, 2, 4, 8, 16 dB • PCS, WLL, LMDS Miniature QSOP - 16 Package • IF applications. Functional Diagram General Description The HMC235QS16G is a broadband 5-bit digital attenuator in a 16 - lead (narrow pitch) surface mount QSOP plastic package with an exposed ground slug. This package occupies the same area as an 8 lead SOIC package. The 1, 2, 4 and 8 dB bits have less than 10 degrees relative phase shift. The five primary attenuation states can be activated independently, or collectively for attenuation levels of 1 to 31 dB. Electrical Specifications, TA = +25° C, With 0/-5V Control Parameter Frequency Insertion Loss DC - 2 GHz 2 - 4 GHz Typical Max. Units 5.0 5.3 5.4 6.0 dB dB Attenuation Range DC - 4 GHz 25 31 dB Input Return Loss (All States) DC - 2 GHz 2 - 4 GHz 7 4 12 7 dB dB Output Return Loss (All States) DC - 2 GHz 2 - 4 GHz 10 7 18 11 dB dB Attenuation Accuracy: 1 dB Bit 2 dB Bit 4 dB Bit 8 dB Bit 16 dB Bit All Bits (31 dB) 0.1 - 2 GHz 0.5 1.4 3.2 7.0 14.0 26.0 1 2 4 8 16 31 1.5 2.6 4.8 9.0 17.9 35.0 dB dB dB dB dB dB Attenuation Accuracy: 1 dB Bit 2 dB Bit 4 dB Bit 8 dB Bit 16 dB Bit All Bits (31 dB) 2 - 4 GHz 0.5 1.3 3.2 7.0 14.0 25.0 1 2 4 8 16 31 1.5 2.7 4.8 9.0 17.9 35.0 dB dB dB dB dB dB Switching Characteristics 2 - 42 Min. tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF) DC - 4 GHz 3 6 ns ns Input Power for 0.2 dB Compression 0.05 GHz Min. Atten. State 0.05 GHz All Atten. States 0.5 - 4 GHz Min. Atten. State 0.5 - 4 GHz All Atten. States 8 7 18 7 12 11 24 12 dBm dBm dBm dBm Input Third Order Intercept Point Two-tone Input Power = +5 dBm Each Tone 0.05 GHz Min. Atten. State 0.05 GHz All Atten. States 0.5 - 4 GHz Min. Atten. State 0.5 - 4 GHz All Atten. States 24 23 38 22 28 30 44 32 dBm dBm dBm dBm For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Visit us at www.hittite.com, or Email at [email protected] MICROWAVE CORPORATION HMC235QS16G v01.0801 1 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz Relative Attenuation 0 0 -1 -5 -2 -3 -40 C +25 C -4 -5 -6 2 dB 4 dB 1 dB -15 8 dB -20 16 dB -25 -30 +85 C 31 dB -7 -35 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) FREQUENCY (GHz) Return Loss (Reference State) Relative Phase 70 0 INPUT RETURN LOSS 60 31 dB -10 PHASE (DEGREES) RETURN LOSS (dB) 2 -10 -20 OUTPUT RETURN LOSS -30 50 40 ATTENUATORS - SMT RELATIVE ATTENUATION (dB) INSERTION LOSS (dB) Insertion Loss 1, 2, 4 dB 30 16 dB 8 dB 20 10 -40 0 0 0.5 1 1.5 2 2.5 3 3.5 0 4 0.5 1 FREQUENCY (GHz) Input Return Loss 2 2.5 3 3.5 4 Output Return Loss 0 OUTPUT RETURN LOSS (dB) 0 31 dB INPUT RETURN LOSS (dB) 1.5 FREQUENCY (GHz) 4 dB -10 -20 REF. STATE -30 16 dB REF. STATE -10 -20 4 dB -30 31 dB 2 dB -40 -40 0 0.5 1 1.5 2 2.5 FREQUENCY (GHz) 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz) For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Visit us at www.hittite.com, or Email at [email protected] 2 - 43 HMC235QS16G v01.0801 MICROWAVE CORPORATION 1 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz Input Power for 0.2 dB Compression Input Power for 0.2 dB Compression (Minimum Attenuation) (Maximum Attenuation) 0.2 dB COMPRESSION (dBm) 30 O -40 C 25 20 O +25 C O +85 C 15 10 5 0 25 O -40 C 20 15 10 O +85 C O +25 C 5 0 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0.5 1 FREQUENCY (GHz) 1.5 2 2.5 3.5 4 3.5 4 IP3 (Maximum Attenuation) 60 60 O +25 OC +85 C 50 50 O +85 C IP3 (dBm) 40 O -40 C 30 40 30 20 20 10 10 O O -40 C 0 +25 C 0 0 0.5 1 1.5 2 2.5 FREQUENCY (GHz) 2 - 44 3 FREQUENCY (GHz) IP3 (Minimum Attenuation) IP3 (dBm) ATTENUATORS - SMT 2 0.2 dB COMPRESSION (dBm) 30 3 3.5 4 0 0.5 1 1.5 2 2.5 3 FREQUENCY (GHz) For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Visit us at www.hittite.com, or Email at [email protected] MICROWAVE CORPORATION HMC235QS16G v01.0801 1 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz Truth Table Control Voltages Control Input Bias Condition Low 0 to -0.2 V @ 20 uA Max High -3V @ 50 uA Typ to -8V @ 500 uA Max 4 dB Bit Absolute Maximum Ratings Control Voltage Range +0.5 to +8.5 Vdc Storage Temperature -65 to +150 deg C Operating Temperature -40 to +85 deg C RF Input Power (0.5 - 4 GHz) Insertion Loss State Any Attenuation State +27 dBm +13 dBm 1 dB 2 dB 8 dB Bit 16 dB Bit Att Set A! B1 A2 A3 A4 B4 A5 B5 High Low High High High Low High Low Ref High Low Low High High Low High Low 1dB High Low High Low High Low High Low 2dB Low High High High High Low High Low 4dB High Low High High Low High High Low 8dB High Low High High High Low Low High 16dB Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. Outline Drawing EXPOSED GROUND SLUG (CONNECT TO RF GROUND PLANE) 0.189/0.197 (4.80/5.00) 2 ATTENUATORS - SMT State DATE CODE YY = YEAR 0.150/0.157 (3.81/3.99) HMC235 YYWW ZZZZ WW = WEEK 0.228/0.224 (5.76/6.20) 0.080 (2.03) LOT NUMBER 0.037 ± 0.015 (0.94 ± 0.38) PIN 1 0.105 (2.67) PIN 1 0.004 / 0.010 (0.1 / 0.25) TYP 0.051/0.059 (1.30 / 1.50) 0.0256 (.65) 0.010 (0.025) 0.000/0.004 (0.00/0.10) 0.044 ± 0.015 (1.12 ± 0.38) 0.016 (0.41) MIN TYP 1. MATERIAL: A) PACKAGE BODY - LOW STRESS INJECTION - MOLDED PLASTIC. B) LEADFRAME AND SLUG MATERIAL: COPPER ALLOY. 2. PLATING: LEAD-TIN SOLDER PLATE. 3. DIMENSIONS ARE IN INCHES (MILLIMETERS), UNLESS OTHERWISE SPECIFIED TOL. ARE ±0.005 ( ±0.13). 4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE. 5. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE. For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Visit us at www.hittite.com, or Email at [email protected] 2 - 45 MICROWAVE CORPORATION HMC235QS16G v01.0801 1 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz Suggested Driver Circuit 100Ω * Vz=5.1V Izt=50uA 2 Ax COMPENSATED 100pF * DEVICES ATTENUATORS - SMT CD4689 2 - 46 TTL OR CMOS VCC VCC GND GND GaAs ATTENUATOR CONTROL 100Ω* Bx 10K 74HCT04 (TTL) 74HC04 (CMOS) 100pF* -5 VDC Simple driver using inexpensive standard logic ICs provides fast switching using minimum DC current. *Recommended values to suppress unwanted RF signals at Ax/Bx control lines. Component values may be adjusted for switching speed considerations. For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Visit us at www.hittite.com, or Email at [email protected] MICROWAVE CORPORATION HMC235QS16G v01.0801 1 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz Evaluation Circuit Board The circuit board used in the final application should use RF circuit design techniques. Signal lines should have 50 ohm impedance while the package ground leads should be connected directly to the ground plane similar to that shown. A sufficient number of VIA holes should be used to connect the top and bottom ground planes. The evaluation circuit board as shown is available from Hittite Microwave Corporation upon request. ATTENUATORS - SMT 2 Evaluation Circuit Board Layout Design Details Layout Technique Ground Co-Planar Waveguide (GCPW) Material Rogers 4350 Dielectric Thickness 0.020” (0.51 mm) 50 Ohm Line Width 0.034” (0.86 mm) Gap to Ground Edge 0.010” (0.25 mm) Ground VIA Hole Diameter 0.014” (0.36 mm) Connectors SMA-F (EF - Johnson P/N 142-0701-806) For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Visit us at www.hittite.com, or Email at [email protected] 2 - 47