Data Sheet P RE L I M I NA R Y December 2000 File Number 4862.4 2.4GHz Power Amplifier and Detector Features The ISL3984 is a 2.4GHz monolithic SiGe Power Amplifier designed to operate in the ISM Band. It features two low voltage single supply stages. Cascaded, they deliver 18dBm (Typ) output power for the typical DSSS signal (ACPR, 1st Side Lobe < -30dBc, 2nd Side Lobe < -50dBc). • Single Supply . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 3.6V In addition, the device includes a 2.4GHz detector which is accurate over a 15dB dynamic range within (±)1dB. Therefore, an accurate ALC function can be implemented. Applications • Output Power . . . . . . . . . . . 18dBm (Typ) at ACPR, DSSS, 1st Side Lobe < -30dBc, 2nd Side Lobe < -50dBc • Power Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30dB (Typ) • Detector Linear Input Power Range . . . . . . . . . . . . . .15dB • Detector Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±1dB • IEEE802.11 1, 2 or 5.5Mbps Standard • Systems Targeting IEEE802.11b, 11Mbps Standard The ISL3984 is housed in a 16 lead MLFP package well suited for PCMCIA board applications. • Wireless Local Area Networks (WLAN) Ordering Information • ISM Systems Including Automatic Level Control (ALC) • PCMCIA Wireless Transceivers • TDMA Packet Protocol Radios 16 Ld MLFP ISL3984IR96 -40 to 85 Tape and Reel ISL3984 (MLFP) TOP VIEW L16.4x4 GND -40 to 85 Pinouts GND ISL3984IR PKG. NO. 12 11 10 9 GND PACKAGE Simplified Block Diagram RF_IN PART NUMBER TEMP RANGE (oC) DS_VCC DET_OUT 13 RF_IN RF_OUT VCC_DET 14 PE 15 8 GND PACKAGE PINOUT SUBJECT TO CHANGE 7 GND 6 RF_OUT PEAK DETECTOR BIAS_GND 16 BIAS 1 2 3 4 GND DET_OUT 1 DS_VCC REXT LOG REXT PE 5 GND BIAS_VCC [ /Title (ISL39 84) /Subject (2.4G Hz Power Amplifier and Detector) /Autho r () /Keywords (Intersil Corporation, semiconductor, Wireless Communications , RF, Radio Frequency , IF, Intermediate Fre- ISL3984 TM CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000 PRISM® is a registered trademark of Intersil Corporation. PRISM and design is a trademark of Intersil Corporation. ISL3984 Pin Descriptions PIN NUMBER 1 NAME DESCRIPTION BIAS_VCC Power Supply. 2 REXT 3 DS_VCC 4, 5 GND 6 RF_OUT 7, 8, 9, 10 GND 11 RF_IN 12 GND 13 DET_OUT Detector Output. 14 VCC_DET Detector Power Supply. 15 PE 16 Bias Resistor, biasing scheme independent of absolute temperature. Driver Stage Power Supply. DC and RF Ground. RF Output of the Power Amplifier. DC and RF Ground. RF Input of the Power Amplifier. DC and RF Ground. Digital Input Control Pin to enable operation of the Power Amplifier. Enable logic level is high. BIAS_GND DC and RF Ground. The ISL3984 works seamlessly with the PRISM II and PRISM II.V WLAN chip set components to give you a highly integrated, cost effective 11Mb/s WLAN solution in the 2.4 to 2.5GHz ISM band. The ISL3984 is fabricated in the fastest SiGe BiCMOS process available allowing superior RF performance, normally found only in GaAs ICs. Cost effective functions, normally requiring external components, are integrated into one IC. The ISL3984 integrates the following functions in one compact 16 pin MLFP: • Two Stage, 30dB Gain RFPA, • Logarithmic power detect function (15dB Dynamic Range), • CMOS level compatible Power Up/Down function, • Single Supply, 2.7V to 3.6V Operation. 2 The ISL3984 contains a highly linear RFPA designed to deliver 18dBm and meet an ACPR specification of -30dBc in the 2.4 to 2.5GHz ISM band. The performance of this two stage RFPA can be optimized by adjusting the bias current with a dedicated resistor. No external positive or negative power supplies are required to set the bias currents. The on chip bias network provides the optimum bias current temperature compensation when low TC external resistor is used. To get the best performance from the ISL3984, the output stage matching network can be tailored using external components. The ISL3984 power detect function provides a DC output voltage that is proportional to the logarithm of the output power. For an output power of 18dBm, the detector is accurate to within a 0.5dB. The slope of the detector output voltage is 100mV/dB over a 15dB dynamic range. A simple application of the detector is to provide in-line monitoring of the output power using a DC voltmeter. No longer is a power meter or spectrum analyzer required. A more value added application would use the HFA3861B/HFA3863 Baseband Processor to dynamically monitor the ISL3984 output power and to control transmit power by adjusting the AGC of the HFA3783 IF Quadrature Modem to provide the best possible error free data transfer rate for any given environment. Closed loop power control is very important feature which compensates for variability in the transmit chain (radio to radio, channel to channel, over temperature...). The ISL3984 power up/down feature integrates the power down capability onto the IC and requires no external components thus freeing up board space and reducing external component count and cost. When the CMOS compatible Power Enable (PE) pin is driven low, the total supply current drops to under 50µA in, typically, 300ns. When the PE pin is driven high, the full ISL3984 output power is available in a few hundred nanoseconds. In summary, the ISL3984 RFPA provides a highly cost effective solution for the PA function by integrating many features that would require significant development time, drive up the total bill of materials cost and consume precious board space. It mates seamlessly with the other PRISM II ICs to provide a highly integrated, cost effective 11Mb/s WLAN solution in the 2.4 to 2.5GHz ISM band. ISL3984 Absolute Maximum Ratings Thermal Information Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4V Voltage on Any Other Pin. . . . . . . . . . . . . . . . . . . -0.3 to VCC +0.3V VCC to VCC Decouple . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +0.3V Any GND to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +0.3V Thermal Resistance (Typical, Note 1) θJA (oC/W) MLFP Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Maximum Junction Temperature (Plastic Package) . . . . . . . .150oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300oC Operating Conditions Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to 85oC Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 3.6V CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTE: 1. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Intersil TB379. General DC Electrical Specifications TEMP. (oC) MIN Supply Voltage Full Total Power Amplifier Supply Current at 3.3V, 18dBm Output 25 PARAMETER TYP MAX UNITS 2.7 - 3.6 V - 137 - mA RF Detector Supply Current 25 - - 2 mA Power Down Supply Current Full - 200 - µA Power Up/ Down Speed Full - 300 - ns CMOS Low Level Input Voltage Full - - 0.3*VDD V CMOS High Level Input Voltage (VDD = 3.6V) Full 0.7*VDD - - V CMOS Threshold Voltage Full >0.3*VDD 0.5*VDD <0.7*VDD V CMOS High or Low Level Input Current Full -10 - +10 µA Power Amplifier AC Electrical Specifications VCC = 3.3V, f = 2.45GHz, Unless Otherwise Specified. Typical Application Circuit (external input and output matching networks) has been used. TEMP. (oC) MIN RF Frequency Range Full Power/Voltage Gain Full Input 50Ω VSWR Output 50Ω VSWR PARAMETER TEST CONDITIONS TYP MAX UNITS 2400 - 2500 MHz 27 30 35 dB 25 - - 2:1 - 25 - - 3:1 - Full - 18 - dBm Output Power ACPR, DSSS, 1st Side Lobe <30dBc, 2nd Side Lobe <-50dBc Output Stability VSWR Output Spurs Less than -60dBc Full - - 10:1 - Output Load Mismatch (Note 2) Full - - 10:1 - NOTE: 2. Devices sustain no damage when subjected to a mismatch of maximum 10:1. Peak Detector AC Electrical Specifications TEST CONDITIONS TEMP. (oC) MIN TYP MAX UNITS RF Output Detector Response Time External Capacitor, C = 5pF Full - 0.15 - µs RF Output Detector Voltage Range Load > 1M Full 0 - 1.5 V RF Output Detector Linearity Over Linear Range Full -0.5 - 0.5 dB/V RF Output Detector Accuracy 600mVDC Output Full -1 - +1 dB RF Output Detector Slope Over Linear Range Full - 10 - dB/V PARAMETER 3 ISL3984 Typical Application Example ISL3984 - 16 PIN MLFP PACKAGE L2 BLM31P500S RFIN (50Ω) VCC C10 P1 C1 4.7µF C3 0.1µF 2.7pF 3.3V P2 D1 12 11 10 DL4001 C11 270pF DETOUT C9 1000pF VCC 9 R4 1kΩ R3 13 8 14 7 15 6 16 5 10Ω VCC 1 4 L1 BLM10A1215 L3 1.5nH C4 1000pF 3 2 4.64kΩ R2 100kΩ R1 C6 1000pF PE V CC C2 1000pF L5 2.2nH L4 BLM10A1215 RFOUT (50Ω) C5 1000pF C7 10pF C8 1.8pF Typical Performance Curves -5 INPUT RETURN LOSS (dB) INPUT RETURN LOSS (dB) -5 -17 -20 2.7V -29 2.0 3.6V 2.4 2.5 -17 -40oC -20 25oC -29 85oC 3.0 2.0 2.4 2.5 3.0 FREQUENCY (GHz) FREQUENCY (GHz) FIGURE 1. INPUT RETURN LOSS OVER VOLTAGE FIGURE 2. INPUT RETURN LOSS OVER TEMPERATURE 4 ISL3984 (Continued) OUTPUT RETURN LOSS (dB) OUTPUT RETURN LOSS (dB) Typical Performance Curves -4 2.7V -9 -10 -4 -40oC -9 25oC -10 85oC 3.6V 2.0 2.4 2.5 2.0 3.0 2.4 2.5 3.0 FREQUENCY (GHz) FREQUENCY (GHz) FIGURE 3. OUTPUT RETURN LOSS OVER VOLTAGE FIGURE 4. OUTPUT RETURN LOSS OVER TEMPERATURE 32 32 28 LINEAR GAIN (dB) 30 28 2.4 2.5 25oC 85oC 3.0 2.0 2.4 2.5 3.0 FREQUENCY (GHz) FREQUENCY (GHz) FIGURE 5. LINEAR GAIN OVER VOLTAGE FIGURE 6. LINEAR GAIN OVER TEMPERATURE 0 1 3.6V 2 2.7V 3.6V 2.7V -25 -11 2dB/DIV. OUTPUT POWER (dBm) COMPRESSION (dBm) 2.0 -40oC -5 INPUT POWER (dBm) FIGURE 7. GAIN COMPRESSION OVER VOLTAGE 5 0 85oC 1 2 25oC -40oC 85oC 25oC -25 -11 -40oC 2dB/DIV. 2.7V OUTPUT POWER (dBm) COMPRESSION (dBm) LINEAR GAIN (dB) 3.6V 30 -5 INPUT POWER (dBm) FIGURE 8. GAIN COMPRESSION OVER TEMPERATURE ISL3984 Typical Performance Curves (Continued) -40C 10dB/DIV. 10dB/DIV. 2.7V 3V 3.3V 3.6V 25C 85C CENTER FREQUENCY 2450MHz SPAN 50MHz CENTER FREQUENCY 2450MHz INPUT POWER -2dBm SPAN 50MHz FIGURE 9. DSSS OUTPUT SIGNAL OVER VOLTAGE INPUT POWER -2dBm FIGURE 10. DSSS OUTPUT SIGNAL OVER TEMPERATURE 0.9 0.9 0.8 0.8 DETECTOR OUTPUT (V) DETECTOR OUTPUT (V) 0.7 0.6 0.5 0.4 0.3 2.7V 0.2 3.6V 0.1 14 85oC 0.6 25oC 0.5 0.4 -40oC 0.3 0.2 0 13 0.7 15 16 17 18 19 20 OUTPUT POWER (dBm) FIGURE 11. DETECTOR OUTPUT OVER VOLTAGE 6 0.1 13 14 15 16 17 18 19 20 OUTPUT POWER (dBm) FIGURE 12. DETECTOR OUTPUT OVER TEMPERATURE ISL3984 Micro Lead Frame Plastic Package (MLFP) L16.4x4 2X 0.25 C A D A 16 LEAD MICRO LEAD FRAME PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220-VGGC ISSUE A) D/2 INCHES D1 SYMBOL D1/2 2X N 6 0.50 DIA. 0.25 C B 1 2 3 E1/2 E/2 E1 2X B 0.20 C A TOP VIEW 2X 0 A2 A C SEATING PLANE A3 SIDE VIEW 5 b 4X P 0.10 M C A B 7 D2 D2/2 0.039 - 1.00 0.002 - 0.05 A2 - 0.031 - A3 0.008 REF 1 (Ne-1)Xe REF. E2 7 E2/2 L e (Nd-1)Xe REF. BOTTOM VIEW C L 5 C C A1 C L b 0.009 0.014 0.147 BSC D2 - 0.088 0.80 0.20 REF 0.23 0.157 BSC D1 0.35 3.75 BSC - 2.25 E 0.157 BSC 4.00 BSC 0.147 BSC 3.75 BSC E2 - - 0.026 BSC 0.019 0.029 5 4.00 BSC E1 0.088 NOTES 2.25 7 7 0.65 BSC 0.50 0.75 N 16 16 2 Nd 4 4 3 Ne 4 4 3 P 0.009 0.024 0.24 0.60 θ - 12 - 12 Rev. 2 8/00 NOTES: 1. Dimensioning and tolerancing per ASME Y14.5-1994. 2. N is the number of terminals. 3. Nd is the number of terminals in the X direction, and Ne is the number of terminals in the Y direction. 4. Controlling dimension: Millimeters. Converted dimensions to inches are not necessarily exact. Angles are in degrees. 5. Dimension b applies to the plated terminal and is measured between 0.20mm and 0.25mm from the terminal tip. 6. The Pin #1 identifier exists on the top surface as an indentation mark in the molded body. 7. Dimensions D2 and E2 are the maximum exposed pad dimensions for improved grounding and thermal performance. N 4X P 2 3 MAX - L A1 MIN - e 0.05 C MILLIMETERS A D 0.20 C B MAX A1 b E MIN SECTION "C-C" e e TERMINAL TIP FOR ODD TERMINAL/SIDE FOR EVEN TERMINAL/SIDE All Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at website www.intersil.com/quality/iso.asp. Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see web site www.intersil.com 7