RF2860_1 RFMD | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 20
Technical content
Features
LNA Noise Figure=1.3dB (KPCS) Stepped LNA Gain Control Integrated TX LO Buffer Ampli- fier Adjustable IIP3 versus Cur- rent for both LNA and Mixer Blocks All Pins ESD Protected
Applications
CDMA Korean PCS Systems CDMA US PCS Systems IMT-2000 and 2.4GHz Band GPS Applications General Purpose Downcon- verter Commercial and Consumer Systems RF2860 PCS CDMA Low Noise Amplifier/Mixer Broadband Downcon- verter RF2860PCBA-41X Fully Assembled Evaluation Board Rev A9 DS050902 RF2860PCS CDMA Low Noise Ampli- fier/Mixer Broadband Downcon- verter RoHS Compliant & Pb-Free Product Package Style: QFN, 16-Pin, 3x3
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 Rating Unit Supply Voltage -0.5 to +5.0 V DC Input LO and RF Levels +6 dBm Operating Ambient Temperature -40 to +85 °C Storage Temperature -40 to +150 °C Parameter Specification Unit ConditionMin. Typ. Max. Overall T = 25°C, VCC=2.75V RF Frequency Range 1575 to 2170 MHz IF Frequency Range 0.1 400 MHz Power Supply Supply Voltage 2.65 2.75 3.15 V Logic High 1.8 V Logic Low 0.4 V Power Down Current 10 μAE N A B L E = 0 US PCS Band Korean PCS Band GPS Band IMT-2000 Band Freq=1930MHz to 1990MHz Freq=1840MHz to 1870MHz Freq=1575.42MHz Freq=2110MHz to 2170MHz LNA (On) - KPCS LNA 50Ω match Gain 14.0 16.5 17.5 dB Noise Figure 1.3 1.5 dB Input IP3 +6.0 +8.0 dBm Current 6.5 mA Isolation 20 dB LNA (On) - US PCS LNA 50Ω match Gain 13.5 16.0 17.0 dB Noise Figure 1.4 1.6 dB Input IP3 +6.0 +8.0 dBm Current 6.5 mA Isolation 30 dB LNA (On) - GPS Band LNA 50Ω match Gain 14.75 17.25 18.25 dB Noise Figure 1.2 dB Input IP3 +5.0 dBm Current 6.0 mA Isolation 20 dB LNA (On) - IMT-2000 Band LNA 50Ω match Gain 12.0 14.5 15.5 dB Noise Figure 1.4 dB Input IP3 +8.0 dBm Current 6.0 mA 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. Isolation 20 dB
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Parameter Specification Unit ConditionMin. Typ. Max. LNA (Off) - US PCS, KPCS, GPS, IMT-2000 Gain -6.5 -5.0 -3.5 dB Noise Figure 5.0 6.0 dB Input IP3 +20.0 +25.0 dBm Current 0 mA Isolation 4 dB US PCS Band, Korean PCS Band, GPS Band, IMT-2000 Band, cont’d Mixer - KPCS/US PCS See note. Gain 12.0 14.0 15.5 dB Noise Figure 7.0 8.0 dB Input IP3 +1.0 +3.0 dBm Current 17.5 mA LO to RF Isolation 36 dB Mixer - GPS Gain 16.5 18.5 20.0 dB Noise Figure 7.5 dB Input IP3 -2.0 dBm Current 16.0 mA LO to RF Isolation 36 dB Mixer - IMT-2000 Gain 11.5 13.5 15.0 dB Noise Figure 8.5 dB Input IP3 0.0 dBm Current 16.0 mA LO to RF Isolation 36 dB Other LO-IF Isolation 36 dB RF-IF Isolation 40 dB LNA Out to Mixer In Isolation 30 40 dB LO-LNA In Isolation, Any State 35 dB Control Lines Input Capacitance 1 pF LNA GAIN, ENABLE, TX BUFF ENAB Local Oscillator Input KPCS, US PCS, GPS, IMT-2000 Input Power -10 -4 0 dBm Input Frequency 1391 2360 MHz IF=183.6MHz/210.38MHz/220.38MHz
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Parameter Specification Unit ConditionMin. Typ. Max. TX (Local Oscillator) Buffer PCS Output Power -11 -7 dBm Single-ended 50 Ω load Output Frequency 1600 2300 MHz Current Consumption 2 mA NOTE: Mixer performance can be changed with external IF load/tuning.
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. LNA Performance versus Current (As a function of ISET1 Resistance) Mixer Performance versus Current (As a function of ISET2 Resistance) Evaluation Board Current Measurement Gain (dB) IIP3 (dBm) Noise Figure (dB) ISET1 Resistance (k Ω) Current (mA) 15.6 7.3 1.4 36 4.6 15.7 9.7 1.4 33 4.9 15.9 16.8 1.4 30 5.4 16.1 12.3 1.4 27 6.1 16.2 10.6 1.4 24 6.7 16.4 9.6 1.4 22 7.3 16.4 9.4 1.4 20 7.9 Gain (dB) IIP3 (dBm) Noise Figure (dB) ISET2 Resistance (k Ω) Current (mA) ENABLE LNA GAIN TX BUFF ENAB IDC (mA) US PCS Band Korean PCS Band LNA On, TX Buffer Off 1 1 0 27.5 LNA Bypassed, TX Buffer Off 1 0 0 21.0 GPS Band LNA On, TX Buffer Off 1 1 0 24.5 LNA Bypassed, TX Buffer Off 1 0 0 18.5 IMT-2000 Band LNA On, TX Buffer Off 1 1 0 24.5 LNA Bypassed, TX Buffer Off 1 0 0 18.5 NOTES: All IDC current numbers include bias circuitry current of 1.5mA to 2.0mA (dependent on mode). TX Buffer On: Add 2mA to total current.
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Cascaded Performance (Typical Values for VCC=2.75V) NOTE: All total current numbers include bias circuitry current of 1.5mA to 2.0mA (dependent on mode). Parameter KPCS CDMA PCS CDMA GPS IMT-2000 LNA ON LNA OFF LNA ON LNA OFF LNA ON LNA OFF LNA ON LNA OFF Cascaded: LO to IF Isolation (dB) 40 40 40 40 40 40 40 40 IF1 to RF Isolation (dB) 40 40 40 40 40 40 40 40 IF2 to RF Isolation (dB) 40 40 40 40 40 40 40 40 LO to LNA IN Isolation (dB) 40 40 40 40 40 40 40 40 NOTE: Assumes 2.5dB image filter insertion loss. The TX Buffer is off.
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Pin Function Type Descripti on Interface Schematic 1L N A G A I N D I Logic input. High activates LNA. Low selects LNA bypass mode. 2L N A I N A I US PCS LNA input. KPCS LNA input. GPS LNA input. IMT-2000 LNA input. 3G N D P Ground via within 0.2mm of pin required. 4L N A O U T A O PCS LNA output. Simple external L-C components required for matching and VCC supply. 5I S E T 2 A I External resistor required to set the mixer operating current. 6I S E T 1 A I External resistor required to set the LNA operating current. 7 MIX IN AI KPCS mixer RF single-end input. Matched to 50Ω. USPCS mixer RF single-end input. Matched to 50Ω. GPS mixer RF single-end input. Matched to 50Ω. IMT-2000 mixer RF single-end input. Matched to 50Ω. 8R F V C C P External capacitor and inductor placed close to package required. 9I F O U T + A O IF output. Open collector. 10 IF OUT- AO IF output. Open collector. See pin 9. 11 GND P Ground. 12 LO IN AI LO single-end input. Matched to 50Ω. 13 VCC P External bypass capacitor may be required. 14 LO OUT AO LO output. Internal DC block. Drives 50Ω.
15 TX BUFF
DI Logic input. High enables TX LO output buffer amplifiers. LNA GAIN LNA IN VCC LNA OUT LNA EMITTER MI X I N IF+ IF- LO IN 70 Ω TX BUFF ENAB
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Pin Function Type Descripti on Interface Schematic 16 ENABLE DI Logic input. Low level powers down the IC. Pkg Base GND P Ground connection. The backside of the package should be sol- dered to a top side ground pad which is connected to the ground plane with multiple vias. Legend: DI=Digital Input from Baseband Chip AI=Analog Input AO=Analog Output P=V CC or GND ENABLE
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Package Drawing 0.90 0.85 0.05 C 0.05 0.00 0.70 0.65 12° MAX -C- SEATING PLANE
1.50 TYP
0.10 C A
2 PLCS-A-
3.00
0.10 C B
2 PLCS
1.37 TYP
2 PLCS 2.75 SQ 3.00 -B- 0.60 0.24 TYP 0.50 0.30 PIN 1 ID R.20 0.50 1.65 1.35 SQ.
0.10 C ABM
0.30 0.18 NOTES: 1. Shaded lead is pin 1. Dimension applies to plated terminal: to be measured between 0.20 mm and 0.25 mm from terminal end. Dimensions in mm.
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Application Schematic - Differential IF Matching NOTES: 1. This resistor sets the LNA current. Increasing the resistor value lowers the current. 2. This resistor sets the mixer current. Increasing the resistor value lowers the current. 3. This capacitor is used for optimum noise figure and input matching. 4. This inductor is used for optimum input match. 5. This inductor is used for optimum input match and IP3. Low impedance path to ground for optimum IP3. 6. DC-blocking capacitor. Not required with most SAW filters. 7. This inductor is used for LNA output match and as an RF choke. 8. This resistor is used to optimize performance over temperature and bias. 9. This inductor is used to optimize the LNA output match. 10.This inductor/capacitor parallel combination is used for mixer/preamp interstage matching and must be placed ~1.6mm or closer to pin 8. 11.Ground for LNA. Place ground via as close to pin as possible for maximum gain. 12.IF output matching component values are dependent on board layout, IF SAW filter, and the IF frequency selected. Please contact RFMD application engineering for assistance with IF output matching. See attached Single-Ended and Differential Tuning procedure. 13.These two values are contingent on type of IF SAW filter used. 14.Depending on SAW Filter used, resistor value will be between 2Ω to 10Ω. Application C1 (pf) (pf) (pF) (pF) (nH) (nH) (nH) (nH) (nH) (nH) (nH) (kΩ) (kΩ) (kΩ) US PCS, IF=184MHz Korean PCS, IF=220MHz GPS, IF=184MHz IMT-2000, IF=190MHz 16 15 14 13 5 6 7 8 3 pF 33 nF LNA GAIN ENABLE TX BUFF ENAB DNI 33 nF LNA IN 2.2 nH LO OUT LO IN RF VCC 3.9 nH VCC VCC FL4 RF Saw GNDGND GNDGND OUT IN 1 pF 30 Ω 1.3 pF Note 6 Note 3 Note 4 Note 8 Note 7 Note 9 Note 14 Note 10 Note Note 2 Note VCC 33 nF 33 nF VCC Note 12 FL2 IF Saw Note 132 to 10 Ω Note 5 IF OUT 33 nF
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Application Schematic Single-End IF Matching NOTES: 1. This resistor sets the LNA current. Increasing the resistor value lowers the current. 2. This resistor sets the mixer current. Increasing the resistor value lowers the current. 3. This capacitor is used for optimum noise figure and input matching. 4. This inductor is used for optimum input match. 5. This inductor is used for optimum input match and IP3. Low impedance path to ground for optimum IP3. 6. DC-blocking capacitor. Not required with most SAW filters. 7. This inductor is used for LNA output match and as an RF choke. 8. This resistor is used to optimize performance over temperature and bias. 9. This inductor is used to optimize the LNA output match. 10.This inductor/capacitor parallel combination is used for mixer/preamp interstage matching and must be placed ~1.6mm or closer to pin 8. 11.Ground for LNA. Place ground via as close to pin as possible for maximum gain. 12.IF output matching component values are dependent on board layout, IF SAW filter, and the IF frequency selected. Please contact RFMD application engineering for assistance with IF output matching. See attached Single-Ended and Differential Tuning procedure. 13.These two values are contingent on type of IF SAW filter used. 14.Depending on SAW Filter used, resistor value will be between 2Ω to 10Ω. Application C2 (pF) (pF) (nH) (nH) (nH) (nH) (kΩ) (kΩ) (kΩ) 3 pF 15 nH DNI 33 nF LNA IN LNA GAIN ENABLE TX BUFF ENAB 2.2 nH LO OUT VCC C2 R1 L1 L2 VCC 33 nF CDMA IF+ CDMA IF- LO IN RF VCC 3.9 nHL6 CDMA IF Saw 16 15 14 13 5 6 7 8 1 pF Note 5 Note 4 30 Ω VCC Note 6 Note 8 Note 9 Note 2 1.3 pF Note Note 7 Note 14 RF Saw OUTIN GND GND GND GND Note 11 33 nF Note 3 Note 1 Note 12 2 to 10 Ω 33 nF
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Evaluation Board Schematic KPCS, IF=220.38MHz (Download Bill of Materials from www.rfmd.com.) Differential IF Matching C22 3 pF 3.3 nH 33 nF L11 2.2 nH C15 6.2 pF 5.6 kΩ 100 nHL5 15 nH 16 15 14 13 5 6 7 8 FL1 FILTER SAWTEK 2X2 GND GND C13 10 pF 33 nF LNA GAIN C17 33 nF C11 DNI DNI L3* DNI 1.5 nH C14 1 pF LNA IN LNA OUT 30 Ω 33 nF VCC 8.2 kΩ 27 kΩ 33 nH C19* DNI C18* DNI 33 nF MIX IN DNI C21* DNI L10 3.9 nH C23 1.3 pF 33 nFVCC C16 6.2 pF 180 nH 33 nF VCC 5.1 pF CDMA IF LO IN VCC C12 DNI C10 DNI LO OUT 33 nF ENABLE 33 nF TX BUF EN *IF FREQ=220MHz
1 CON3
P3* 1DNI
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. L2, L3 and C2 are chosen to resonate at the desired IF freque ncy. C2 can be omitted and the value of L1 increased and uti- lized solely as a choke to provide V CC to the open-collector outputs, but it is strongly recommended that at least some small- valued C2 (a few pF) be retained for better mixer linearity performance. R1 is normally selected to match the input impedance of the IF filter. However, mixer performance can be modified by selecting an R value that is different from the IF filter input impedance, and inserting a conjugate matching network between the Resistive Output Network and the IF filter. C1 and C3 serve dual purposes. C1 and C3 serve as a series DC block when a DC path to ground is present in the IF filter. In addition, C1 may be chosen to improve the combine performance of the mixer and IF filter. L1 should choose to resonate with the internal capacitance of the SAW filter. Usually, SAW filter has some capacitance. Otherwise, L1 could be eliminated. A practical approach to obtain the differential matching is to tune the mixer to the correct load point for gain, IIP3, and NF using the single-end current combiner meth od. Second, use the component values found in the single-end approach as start- ing point for the differential matching. Th e two-shunt capacitors in the single-end matching could be converted to a parallel capacitor and the parallel inductor in the single-end matching needs to be converted in to a choke inductor. Third, set the DC block capacitors (C1 and C3) in the differential-end matching to a high value (i.e., 100pF) and retune the resonate circuit (C2 , L2 and L3) and the resistor (R) for optimal performance. After optimal performance is achieved and if performance is not satis- factory, decrease the series capacitors until optimal performance is achieved. Single-End IF Matching C2 R1L2 VCC 100 pF IF+ IF- L2 IF Saw
10 IF-
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. L1, C1, C2, and R form a current combiner which performs a diff erential to single-ended conversion at the IF frequency and sets the output impedance. In most cases, the resonance freq uency is independent of R and can be set according to the fol- lowing equation: Where CEQ is the equivalent stray capacitance and capacitance look ing into pins 9 and 10. An average value to use for C EQ is 2.5pF. R can then be used to set the output impedance according to the following equation: where ROUT is the desired output impedance and RP is the parasitic equivalent parallel resistance of L1. C2 should first be set to 0 and C1 should be chosen as high as possible (not greater than 39pF), while maintaining an RP of L1 that allows for the desired R OUT. If the self-resonant frequencies of the selected C1 produce unsatisfactory linearity perfor- mance, their values may be reduced and compensated for by including C2 capacitor with a value chosen to maintain the desired FIF frequency. L2 and C3 serve dual purposes. L2 serves as an output bias choke, and C3 serves as a series DC block. In addition, L2 and C3 may be chosen to form an impedance ma tching network if the input impedance of the IF filter is not equal to ROUT. Otherwise, L2 is chosen to be large (suggested 120nH) and C3 is chosen to be large (suggested 22nF) if a DC path to ground is present in the IF filter, or omitted if the filter is DC-blocked. IF- IF+ C2 RL1L2VCC 100 pF IF Saw 10IF+ IF- fIF R 1 RP ⎛⎞ 1–
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. RF2860 Layout Requirements NOTES: 1. This component is not required on the evaluation board. It may be required on the phone board for optimum IIP3. Compo- nent placeholder should be on phone board. 2. Ground for LNA emitter. For maximum gain, pl ace ground via as close to pin 3 as possible. 3. This capacitor is required as part of the mixer input match. 4. This inductor/capacitor parallel combination is used for mixer/preamplifier interstage tuning. It must be placed ~1.6mm or closer to pin 8.
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. to 8μinch gold over 180μinch nickel. Figure 1. PCB Metal Land Pattern (Top View)
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com. Tape and Reel Information Carrier tape basic dimensions are based on EIA481. The pocket is designed to hold the part for shipping and loading onto SMT manufacturing equipment, while protecting the body and the solder terminals from damaging stresses. The individual pocket design can vary from vendor to vendor, but width and pitch will be consistent. Carrier tape is wound or placed onto a shipping reel either 330 mm (13 inches) in diameter or 178 mm (7 inches) in diameter. The center hub design is large enough to ensure the radius formed by the carrier tape around it does not put unnecessary stress on the parts. Prior to shipping, moisture sensitive parts (MSL level 2a-5a) are baked and placed into the pockets of the carrier tape. A cover tape is sealed over the top of the entire length of the carrier tape. The reel is sealed in a moisture barrier, ESD bag, which is placed in a cardboard shipping box. It is important to note th at unused moisture sensitive parts need to be resealed in the moisture barrier bag. If the reels exceed the exposure limit and need to be rebaked, most carr ier tape and shipping reels are not rated as bakeable at 125°C. If baking is required, device s may be baked according to section 4, table 4-1, column 8 of Joint Industry Standard IPC/JEDEC J-STD-033A. The following table provides useful information for carrier tape and reels used for shipping the devices described in this docu- ment. QFN (Carrier Tape Drawing with Part Orientation) RFMD Part Number Reel Diameter Inch (mm) Hub Diameter Inch (mm) Width (mm) Pocket Pitch (mm) Feed Units per Reel RF2860TR7 7 (178) 2.4 (61) 12 4 Single 2500 Notes: 1. All dimensions are in millimeters (mm). 2. Unless otherwise specified, all dimension tolerances per EIA-481. Ao = 3.18 ± 0.10 Bo = 3.18 ± 0.10 F = 5.50 ± 0.05 Ko = 1.02 ± 0.10 P = 4.00 ± 0.10 Ø1.50±.10 15 inch Trailer Top View 15 inch Leader Sprocket holes toward rear of reel Pin 1 Location RF Part Number Trace Code RF Part Number Trace Code RF Part Number Trace Code RF Part Number Trace Code RF Part Number Trace Code RF Part Number Trace Code RF Part Number Trace Code 2.00 ± 0.05 4.00 ± 0.10 F W 1.75±0.10 Bo Ko P Ao 0.279 ±.020 Direction of Feed
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.