RF2637_1 RFMD | Alldatasheet
Document overview
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Technical content
Features
Supports Basestation Applica- tions -55dB to +5 1dB Gain Control Range @ 85MHz Single 3V Power Supply -2dBm Input IP3 12MHz to 385MHz Operation
Applications
3V Basestation Systems General Purpose Linear IF Ampli- fier Commercial and Consumer Sys- tems Portable Battery-Powered Equip- ment RF2637Receive AGC Amplifier RF2637 PCBA Fully Assembled Evaluation Board Rev A5 DS050829 RoHS Compliant & Pb-Free Product Package Style: MSOP-8
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Absolute Maximum Ratings Parameter Value Unit Supply Voltage -0.5 to +5.0 V DC Control Voltage -0.5 to +5.0 V DC Input RF Power +10 dBm Operating Ambient Temperature -40 to +85 °C Storage Temperature -40 to +150 °C Parameter Specification Unit ConditionMin. Typ. Max. Overall T=25°C, 85MHz, V CC=3.0V , ZS =500Ω, ZL=500 Ω, 500Ω External Input Terminating Resistor, 500Ω External Output Terminating Resistor (Effective ZS=333 Ω, Effective ZL=250 Ω) (See Application Example) Frequency Range 12 to 385 MHz Maximum Gain +40 +51 +65 dB V GC=2.5V, 85MHz Minimum Gain -65 -55 -40 dB V GC=0. 1V , 85MHz Maximum Gain +35 +45 +55 dB V GC=2.5V , 385MHz Minimum Gain -68 -58 -48 dB V GC=0. 1V , 385MHz Gain Slope 57 dB/V Note 1 Gain Control Voltage Range 0 to 2.5 V DC Source impedance of 4.7k Ω Gain Control Input Impedance 30 k Ω Noise Figure 5 7.2 dB At maximum gain and 85MHz Input IP3 -46 -40 dBm At +40dB gain, referenced to 500 Ω -2 dBm At minimum gain, referenced to 500 Ω Stability (Max VSWR) 10:1 Spurious<-70dBm IF Input Input Impedance 1 k Ω CDMA, differential Power Supply Voltage 2.7 to 3.4 V Current Consumption 6 10 15 mA Minimum gain, V CC=3.0V 7 11.5 15 mA Maximum gain, V CC=3.0V Thermal Thermal Resistance 150 °C/W Theta J-Ref 85°C Maximum Junction Temperature 90 °C Ref 85°C Note 1: Measured between a gain control voltage of 1.0V to 1.5V. Caution! ESD sensitive device. Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical perfor- mance or functional operation of the device under Absolute Maximum Rating condi- tions is not implied. RoHS status based on EUDirective2002/95/EC (at time of this document revision). The information in this publication is believed to be accurate and reliable. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended appli- cation circuitry and specifications at any time without prior notice.
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Pin Function Description Interface Schematic 1I N + CDMA balanced input pin. This pin is internally DC-biased and should be DC-blocked if connected to a device with a DC level other than VCC present. A DC to connection to VCC is acceptable. For single-ended input operation, one pin is used as an input and the other CDMA input is AC-cou- pled to ground. The balanced input impedance is 1kΩ, while the single- ended input impedance is 500Ω. 2I N - Same as pin 2, except complementary input. See pin 1. 3G N D Ground connection. For best performance, keep traces physically short and connect immediately to ground plane. 4G C Analog gain adjustment for all amplifiers. Valid control ranges are from 0V to 2.5V. Maximum gain is selected with 2.5V. Minimum gain is selected with 0V. These voltages are only valid for a 4.7k Ω DC source impedance.5O U T - Balanced output pin. This is an open-collector output, designed to operate into a 250Ω balanced load. The load sets the operating impedance, but an external choke or matching inductor to VCC must also be supplied in order to correctly bias this output. This bias inductor is typically incorporated in the matching network between the output and next stage. Because this pin is biased to VCC, a DC-blocking capacitor must be used if the next stage’s input has a DC path to ground. 6O U T + Same as pin 5, except complementary output. See pin 5. 7V C C 2 Supply voltage pin. External bypassing is required. The trace length between the pin and the bypass capacitors should be minimized. The ground side of the bypass capacitors should connect immediately to ground plane. 8V C C 1 Same as pin 7. See pin 7. 700 Ω BIAS 700 Ω CDMA-CDMA+ 23.5 k Ω 15 k Ω 12.7 k Ω V CC OUT-OUT+
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Package Drawing Shaded lead is pin 1. 0.192 ± 0.008 0.118 ± 0.004 sq 0.0256 0.012 6° MAX 0° MIN 0.021 ± 0.004 0.006 ± 0.002 0.034 0.006 ± 0.003 -A-
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Application Schematic Evaluation Board Schematic (Download Bill of Materials from www.rfmd.com.) 5GAI N CONTROL R1: 1 k Ω CDMA- CDMA+ C D M A I F F i l t e r Z S =500 Ω Z IN, EFF =500 Ω Z IN =1 k Ω Z S, EFF =333 Ω Measurement Reference Plane V CC OUT+ OUT- V CC R2: 500 Ω Measurement Reference Plane Z LOAD =500 Ω Z LOAD,EFF =250 Ω Z OUT =500 Ω 10 nF 10 nF R1 sets the CDMA balanced input impedance. The effective input impedance is then 500 Ω . R2 sets the balanced output impedance to 500 Ω . L1 and C2 serve dual purposes. L1 serves as an output bias choke, and C2 serves as a series DC block. In addition, the values of L1 and C2 may be chosen to form an impedance matching network of the load impedance is not 500 Ω . Otherwise, the values of L1 and C1 are chosen to form a parallel-resonant tank circuit at the IF when the load impedance is 500 Ω . GAI N 4.7 k Ω GAIN CONTROL 510 Ω 15 pF 15 pFL3 390nH 390nH 10 nF 4.7 kΩ 15 pF 10 nF 15 pF 10 nF 390 nH 390 nH 1 nF 50 Ω μstrip SMA OUT 50 Ω μstripJ1 SMA CDMA GC VCC2627400A 1 kΩ VCC C10 10 nF 10 nF P1-1 P1-3 VCC GND GC
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Evaluation Board Layout Board Size 2.750" x 2.000" Board Thickness 0.031”, Board Material FR-4
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Gain versus VGC Across Temperature, VCC = 3.0V, FO = 85MHz -60.0 -40.0 -20.0 0.0 20.0 40.0 60.0 VGC (V) Gain (dB) -40°C 25°C 85°C Input IP3 versus VGC Across Temperature, VCC = 3.0V -60.0 -50.0 -40.0 -30.0 -20.0 -10.0 0.0 VGC (V) Input IP3 (dBm) -40°C 25°C 85°C Noise Figure versus Frequency Across Temperature, VCC = 3.0V, VGC = 2.5V 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 Frequency (MHz) Noise Figure (dB) -40°C 25°C 85°C
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.