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| VG024 Product Features * 50 - 2200 MHz bandwidth * 17 dB Attenuation Range * +37 dBm Output IP3 * +21 dBm P1dB * Constant IP3 & P1dB over attenuation range * Single voltage supply for DC and RF circuit * SOIC-8 package w/ heat slug * MTTF > 100 years The Communications Edge TM Wide-band Variable Gain Amplifier Product Information Product Description The VG024 is a wideband high dynamic range variable gain amplifier (VGA) packaged in a SOIC-8 surface-mount package. The +21 dBm output compression point and +37 dBm output intercept point of the amplifier are maintained over the entire attenuation range, making the VG024 ideal for use in temperature compensation circuits. With the suggested driver circuit there can be independent gain slope and offset control for compensating RF chains with many amplifier stages. Other attenuator driver circuits give more functionality to this MCM and can be found in the application notes. Superior thermal design allows the product to have a minimum MTTF rating of 100 years at a mounting temperature of +85 C. All devices are 100% RF & DC tested and packaged on tape and reel for automated surfacemount assembly. Functional Diagram 1 8 7 6 VG024 5 2 3 4 Top View Function Gain Control RF Input Interstage Match RF Output / DC bias Ground Pin No 1 6 2, 7, 8 4 3, 5 Specifications Parameters Frequency Range Gain at min. attenuation Input Return Loss Output Return Loss Output P1dB Output IP3 Noise Figure at min. attenuation Gain Variation Range Supply Voltage Operating RF Amplifier Current Range Gain Control Pin Current Range Thermal Resistance Junction Temperature Units MHz dB dB dB dBm dBm dB dB V mA mA C / W C Min 50 14 Typ 15 -10 -10 +21 +37 5.5 17 +5 150 Max 2200 See note 1 Conditions 5.0 7.2 See note 2 VA,CTRL = 0 V See note 3 See note 4 Pin 4 Pin 1 draws no current at maximum gain See note 5 120 0 180 25 59 160 Test conditions unless otherwise noted. 1. T = 25C, Vdd = +5 V, Frequency = 800 MHz in an application circuit. 2. 3OIP measured with two tones at an output power of +10 dBm/tone separated by 10 MHz. The suppression on the largest IM3 product is used to calculate the 3OIP using a 2:1 rule. 3. Frequency 240-1000 MHz max 6dB at 70 MHz and 7dB at 2.2 GHz T = 25C 4. Frequency 70-1000 MHz min gain control pin current 15mA 11 dB at 2.2 GHz depending on maximum gain control pin current 5. The max junction temperature ensures a minimum MTBF rating of 1 million hours of usage. Absolute Maximum Rating Parameters Operating Case Temperature Storage Temperature Amplifier Supply Voltage (pin 4) Gain Pin Control Current (pin 1) RF Input Power (continuous) Maximum Junction Temperature Ordering Information Part No. VG024 VG024-PCB-240 VG024-PCB-2000 Rating -40 to +85 C -55 to +125 C +6 V +30 mA +12 dBm +220 C Description Wide-band Variable Gain Amplifier Fully Assembled IF Application Board Fully Assembled PCS / UMTS Application Board Operation of this device above any of these parameters may cause permanent damage. This document contains information on a new product. Specifications and information are subject to change without notice WJ Communications, Inc * Phone 1-800-WJ1-4401 * FAX: 408-577-6621 * e-mail: sales@wj.com * Web site: www.wj.com August 2003 VG024 The Communications Edge TM Wide-band Variable Gain Amplifier Product Information Temperature Compensation Application Circuit: 240 MHz Bill of Materials Ref. Des. Description C1, C3, C5 1000 pF Chip Capacitor C2, C4, C8 0.01 F Chip Capacitor C6 2.2 F 1206 Chip Capacitor C7 0.47 F 1206 Chip Capacitor C9 Do Not Load L1, L2 220 nH 0805 Chip Inductor L3 47 nH 0805 Chip Inductor R1 2.21 K Chip Resistor R2 3.32 K Chip Resistor R3, R4, R5 10.0 K Chip Resistor R6 100 Chip Resistor Roffset 0603 chip Resistor Rslope 0603 chip Resistor MMBT2222A Motorola Q1 Transistor U1 VG024 Variable Gain Amplifier U2 LM2904 Dual Op Amp Evaluation Board Layout Functional Pin Layout Pin 1 2 3 4 5 6 7 8 * FUNCTION Gain control pin Interstage Match GND RF Output / Bias GND RF Input Interstage Match Interstage Match The amplifier is biased through Pin 4 and should be connected directly into a voltage regulator. Circuit Board Material: .014" FR-4, 4 layers .062" total thickness This document contains information on a new product. Specifications and information are subject to change without notice WJ Communications, Inc * Phone 1-800-WJ1-4401 * FAX: 408-577-6621 * e-mail: sales@wj.com * Web site: www.wj.com August 2003 VG024 The Communications Edge TM Wide-band Variable Gain Amplifier Product Information Typical Performance Charts: 240 MHz Application Circuit S-Parameters Attenutation Control Voltage =0 V, 25C S21, S11, S22 vs Gain Control Voltage 18 15 S21 (dB) 5 Magnitude (dB) 20 10 0 -10 -20 -30 0 1 Frequency = 240 MHz 15 12 9 6 3 0 Pin Current August 2003 0 -5 Return Loss (dB) 12 9 6 3 200 -10 -15 -20 300 225 Frequency (MHz) 250 275 2 Vcontrol 3 4 5 Vcontrol voltage can be applied to the base of an NPN transistor with the collector connected to the +5V and a 240 ohm current limiting resistor to drive the VG024 as a VGA. This data is represented at 240 MHz in the above graph. Normalized performance can be obtained for the RF circuit tuned from 70-1000 MHz using the temperature compensation application circuit for 240 MHz shown on the previous page. Reducing Roffset increases the overall insertion loss and allows more change (reduction in the value) in Rslope to compensate for more amplifiers or larger temperature changes. VG024 Temperature Compensation Amplifier 15 Roff set = 5.6K 13 Rslope = 5.0K 1.3K 1.0K In 1.8K 800 550 11 Gain (dB) 2.7 9 1.35K Inf 7 510 28 5 210 3 -40 -30 -20 -10 0 10 20 30 Temperature (DEG C) 40 50 60 70 80 This document contains information on a new product. Specifications and information are subject to change without notice WJ Communications, Inc * Phone 1-800-WJ1-4401 * FAX: 408-577-6621 * e-mail: sales@wj.com * Web site: www.wj.com VG024 The Communications Edge TM Wide-band Variable Gain Amplifier Product Information Application Circuit: 2.2 GHz Bill of Materials Ref. Des. Description C1, C5 22 pF Chip Capacitor C2, C10 1.8 pF Chip Capacitor C3 1000 pF Chip Capacitor C4, C8 0.01 F Chip Capacitor C6 2.2 F 1206 Chip Capacitor C7 0.47 F 1206 Chip Capacitor L1 10 nH Chip Inductor L2 18 nH Chip Inductor R1 2.21 K Chip Resistor R2 3.32 K Chip Resistor R3, R4, R5 10.0 K Chip Resistor R6 100 Chip Resistor Roffset 0603 chip Resistor Rslope 0603 chip Resistor MMBT2222A Motorola Q1 Transistor U1 VG024 Variable Gain Amplifier U2 LM2904 Dual Op Amp S-Parameters S21, S11, S22 vs Gain Control Voltage 18 15 S21 (dB) Attenuation Control Voltage =0 V, 25C 5 Return Loss (dB) 20 Magnitude (dB) Frequency = 800 MHz 15 12 9 6 3 0 Pin Current 0 -5 10 0 -10 -20 -30 0 1 2 Vcontrol 12 9 6 3 600 -10 -15 -20 1100 700 800 900 1000 Frequency (MHz) 3 4 5 S-Parameters 12 10 S21 (dB) Attenuation Control Voltage = 0 V, 25C 5 Return Loss (dB) OIP3 / P1dB vs. Norm alized Gain frequency = 900 MHz, Pout = +10 dBm, 25C 40 Magnitude (dBm) 35 30 25 20 15 0 Normalized to the maximum gain level of 17 -5 -10 -15 -20 P1dB OIP 0 -5 -10 -15 -20 2500 8 6 4 2 0 1500 1700 1900 2100 2300 Frequency (MHz) Norm alized Gain (dB) This document contains information on a new product. Specifications and information are subject to change without notice WJ Communications, Inc * Phone 1-800-WJ1-4401 * FAX: 408-577-6621 * e-mail: sales@wj.com * Web site: www.wj.com August 2003 VG024 The Communications Edge TM Wide-band Variable Gain Amplifier Product Information Mounting Configuration Land Pattern ESD Classification: Value: Test: Standard: ESD Classification: Value: Test: Standard: MSL Rating: Standard: Class 1B Passes 600 V Human Body Model (HBM) JEDEC Standard JESD22-A114 Class IV Passes 1000 V Charged Device Model (CDM) JEDEC Standard JESD22-C101 Level 3 JEDEC Standard J-STD-020A This document contains information on a new product. Specifications and information are subject to change without notice WJ Communications, Inc * Phone 1-800-WJ1-4401 * FAX: 408-577-6621 * e-mail: sales@wj.com * Web site: www.wj.com August 2003 VG024 The Communications Edge TM Wide-band Variable Gain Amplifier Product Information Outline Drawing Product Marking The component will be lasermarked with a "VG024" designator with a four-digit alphanumeric lot code on the top surface of the package. Tape and reel specifications for this part will be located on the website in the "Application Notes" section. This document contains information on a new product. Specifications and information are subject to change without notice WJ Communications, Inc * Phone 1-800-WJ1-4401 * FAX: 408-577-6621 * e-mail: sales@wj.com * Web site: www.wj.com August 2003 |
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