MAXIM MAX2059 Manual(1)(1)
Contents
1. MIXER OUTPUT RETURN LOSS MIXER OUTPUT RETURN LOSS LO RETURN LOSS vs LO FREQUENCY vs RF FREQUENCY MIXER DISABLED vs RF FREQUENCY MIXER DISABLED MIXER ENABLED 0 8 0 3 8 g 5 i g i Z o 10 22 WD S 1 10 S 5 2 Tc 85 C E Lu t 15 m 15 z 20 5 5 2 g E 3 2 o 9 5 0V 5 25V S S 5 30 x lt 25 25 30 30 40 1700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 0 50 100 150 200 RF FREQUENCY MHz RF FREQUENCY MHz LO FREQUENCY MH LO RETURN LOSS vs LO FREQUENCY ATTEN A ONLY NO PC BOARD LOSS MIXER ENABLED GAIN vs RF FREQUENCY 10 4 S o 8 m 2 4 75V 5 0V 5 2 amp 30 3 40 4 0 5 100 150 200 1500 1600 1700 1800 1900 2000 2100 2200 2300 LO FREQUENCY MHz RF FREQUENCY MHz ATTEN A ONLY ATTEN A ONLY ABS ACCURACY vs RF FREQUENCY REL ACCURACY vs RF FREQUENCY 3 3 1 0 3 2 z 2 E 05 E 0 0 o ea Z I kJ E 5 05 cc 2 cc amp amp 3 1 0 4 15 5 STATES 24dE 310B x ATTE m 1500 1600 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz 8 MAXIM 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer Typical Operating Characteristics continued MAX2059 Typical Application Circuit Vcc 4 75V to 5 25V digital attenuators set for maximum gain 1700MHz lt fnr lt 2200MHZz 40MHZ lt fL o lt 100MHz Tc 40 C to 85 C Typica2. 100MHz Tc 40 C to 85 C Typical values are at Vcc 5 0V Pin OdBm fRF 1850MHz PLo 6dBm fio 95MHZz fi BOUT fFF fLO and Tc 25 C unless otherwise noted Note 1 PARAMETER SYMBOL CONDITIONS MAX UNITS RMS Error Vector Magnitude EVM ae ar EDGE modulation 200kHz offset 39 1 Pour 12dBm EDGE modulation Note 4 400kHz offset 72 5 600kHz offset 83 1 1 2MHz offset 85 7 Noise Figure 8 1 Input Return Loss 50Q source minimum attenuation setting 19 Output Return Loss 50Q load minimum attenuation setting 24 5 BIT DIGITAL ATTENUATORS gt dBc Spurious Emissions in 3OKHz Bandwidth Attenuator measured separately Zs ZL Insertion Los nserti S 500 Attenuator measured separately Zs ZL Input 3rd Order Intercept Point 50Q two tones fRr1 1850MHZ fRF2 1851MHz Pint PIN2 5dBm Control Range Note 5 Attenuation Step Size Variation Hz to 2000MHz vs Frequency 2000MHz to 2200MHz Hz to 2200MHz Attenuation Variation vs Tc 40 C to 25 C Temperature 1800MHz to 2200MHz C 25 C to 85 C Step Size 1800MHz to 2000MHZ all states represented For steps 0 23dB accuracy is significantly improved See Typical Operating Characterisitcs Relative Step Accuracy 1800MHz to 2000MHUZ all states represented For steps 0 23dB accuracy is significantly improved See Typical Ope
3. is pro grammed with a 3 wire SPI interface with a total effec tive range of 28dB and step size of 1dB See the Applications Information section and Table 1 for attenu ator programming details The attenuators can be used for both static and dynamic power control Table 1 Attenuator Programming ATTENUATOR A 5 MSBs ATTENUATOR B 5 LSBs Bit 9 16dB step Bit 4 16dB step Bit 8 8dB step Bit 3 8dB step Bit 7 4dB step Bit 6 2dB step Bit 5 1dB step Bit 2 4dB step Bit 1 2dB step Bit 0 1dB step Note Due to finite circuit isolation the total effective range of each attenuator is limited to 28aB DATA MSB BIT9 ABIT8 BIT Xero LSB tewn ts S tew NOTES DATA ENTERED ON CLOCK RISING EDGE ATTENUATOR STATE CHANGE ON CS RISING EDGE Figure 1 SPI Timing Diagram MAKIM Driver Amplifier The MAX2059 includes a two stage medium power amplifier with a fixed 18 5dB gain The driver amplifier circuit is optimized for high linearity and medium output power capability for the 1800MHz to 2000MHz frequen cy range The driver amplifier is intended to amplify a modulated signal and drive a high power amplifier in base station transmitters In a typical application the driver amplifier is cascaded in between the two digital attenuators See the Typical Application Circuit The two stage amplifier stage can be disabled for applications where only the digital
4. to Vcc VCCLB VCCLOGIC VCCBIAS1 VCCBIAS2 VCCAMP LB mixer disabled LB_EN 1 LB mixer enabled LB Supply Voltage Vcc Supply Current LOGIC INPUTS DATA CS CLK LB_EN Input High Voltage VIH Low Voltage Current with Logic High Current with Logic Low AC ELECTRICAL CHARACTERISTICS MAX2059 Typical Application Circuit Vcc 4 75V to 5 25V digital attenuators set for maximum gain 1700MHz lt fnr lt 2200MHz 40MHz lt fj o 100MHz Tc 40 C to 85 C Typical values are at Vcc 5 0V Pin OdBm fnr 1850MHz Pio 6dBm fLo 95MHz fi BOUT fFF fLo and Tc 25 C unless otherwise noted Note 1 PARAMETER SYMBOL CONDITIONS MAX2058 MAX2059 Small Signal Gain fRF 1850MHz Tc 25 C All attenuation Tc 40 C to 25 C settings Tc 25 C to 85 C Output Power PIN OdBm fRF 1850MHz Tc 25 C 1800MHz to 2000MHz 2000MHz to 2200MHz RF Frequency Note 2 Gain Variation vs Temperature Output Power Flatness Pin OdBm Attenuation Range Two tones fRF1 1850MHz fnr 1851MHz Pout1 Pout2 5dBm 2 MAKIN Output 3rd Order Intercept Point 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer AC ELECTRICAL CHARACTERISTICS continued MAX2059 Typical Application Circuit Vcc 4 75V to 5 25V digital attenuators set for maximum gain 1700MHz lt fnr lt 2200MHZz 40MHz lt fi o
5. 059 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer ABSOLUTE MAXIMUM RATINGS ViG tO GND t oett dent EA 0 3V to 5 5V Operating Temperature Range Note A HSELUL RSET2 cederet qiero dene 1 2V to 4 0V Junction Temperature sssssssssss LBBIAS TP Vcc 1 5V to 5 5V LB EN DATA CS CLK 0 3V to Vcc 0 3V ATTEN_INA ATTEN_INB ATTEN_OUTA ATTEN_OUTB Storage Temperature Range 3d n putiPOWEL 1 tere Ene rent tre beenden 24dBm Lead Temperature Soldering 10s 300 C 12dBm AMPIN Differential LO Input Power Continuous Power Dissipation TA 70 C 40 Pin TQFN derated 26 3mW C above 70 C 2100mW Note A Tc is the temperature on the exposed paddle of the package Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied Exposure to absolute maximum rating conditions for extended periods may affect device reliability DC ELECTRICAL CHARACTERISTICS MAX2059 Typical Application Circuit Vcc 4 75V to 5 25V R1 1 2kQ R2 2kQ R3 2kQ Tc 40 C to 85 C Typical val ues are at Vcc 5 0V and Tc 25 C unless otherwise noted Note 1 PARAMETER SYMBOL CONDITIONS Reference
6. DABS RAB 19 0566 Rev 0 7 06 MAKII 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer General Description The MAX2059 high linearity digital variable gain amplifier DVGA is designed to provide 56cB of total gain range and typical output IP3 and output P1dB levels of 31 8dBm and 18 4dBm respectively The device is ideal for a variety of applications including single and multicarrier 1700MHz to 2200MHz DCS 1800 PCS 1900 EDGE cdma2000 WCDMA UMTS and TD SCDMA base stations The MAX2059 yields a high level of com ponent integration which includes two 5 bit digital attenuators a two stage driver amplifier a loopback mixer and a serial interface to control the attenuators The MAX2059 is pin compatible with the MAX2058 700MHz to 1200MHz DVGA facilitating an easy design in for applications where a common PC board layout is used for both frequency bands The MAX2059 is available in a 40 pin thin QFN pack age with an exposed paddle Electrical performance is guaranteed over a 40 C to 85 C temperature range Applications DCS 1800 PCS 1900 EDGE Base Station Transmitters and Power Amplifiers cdmaOne and cdma2000 Base Station Transmitters and Power Amplifiers WCDMA TD SCDMA and Other 3G Base Station Transmitters and Power Amplifiers Transmitter Gain Control Receiver Gain Control Broadband Systems Automatic Test Equipment Digit
7. F and O 1uF capacitors as close as possible to the pin RSET1 Input Amplifier Bias Current Setting Resistor Sets the bias current for the input amplifier stage Connect a 1 2kQ resistor to ground Attenuator A Output Internally matched to 50Q ATTEN_INA Attenuator A Supply Voltage 5V supply for attenuator A Bypass to GND with 22pF and 0 01uF capacitors as close as possible to the pin Attenuator A Input Internally matched to 50Q 10 LBBIAS Loopback Mixer Bias Current Setting Resistor Sets the bias current for the mixer Connect a 2kQ resistor to ground Exposed Ground Paddle Solder the exposed paddle to GND using multiple vias MAAKLM 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer Detailed Description The MAX2059 high linearity DVGA consists of two 5 bit digital attenuators a fixed gain two stage driver amplifi er a loopback mixer and a serial interface to control the attenuators This high level of component integra tion makes the MAX2059 ideal for base station trans mitter applications The MAX2059 is designed to operate in the 1700MHz to 2200MHz frequency range The overall cascaded performance of the MAX2059 produces a typical 10 9dB gain a 31 8dBm OIP3 an 18 4dBm OP1aB and a total 56dB gain control range 5 Bit Attenuators The MAX2059 integrates two 5 bit digital attenuators to achieve a high dynamic range Each attenuator
8. F and O 1uF capacitors as close as possible to the pin Loopback Mixer RF Output Internally matched to 509 AC couple with a capacitor Loopback Mixer Logic Input Set to logic low O to enable the mixer Set to logic high 1 to disable the mixer SPI Digital Data Input SPI Clock Input SPI Chip Select Input VCCLOGIC Logic Supply Voltage 5V supply for the internal logic circuitry Bypass to GND with 22pF and O 1uF capacitors as close as possible to the pin Ground EN OUTB Attenuator B Output Internally matched to 500 Vcc Attenuator B Supply 5V supply for attenuator B Bypass to GND with 22pF and 0 01pF capacitors as close as possible to the pin ATTEN_INB Attenuator B Input Internally matched to 50Q RSET2 Output Amplifier Bias Current Setting Resistor Sets the bias current for the output amplifier stage Connect a 2kQ resistor to ground VCCBIAS2 AMPOUT VCCAMP Bias Circuit Supply Voltage 5V supply for the internal bias circuitry Bypass to GND with 1000pF and O 1uF capacitors as close as possible to the pin ier Output Internally matched to 500 RF Amplifier Supply Voltage 5V supply for the RF amplifier Bypass to GND with 1000pF and 0 1uF capacitors as close as possible to the pin AMPIN VCCBIAS1 RF Amplifier Input Internally matched to 50Q Bias Circuit Supply Voltage 5V supply for the internal bias circuitry Bypass to GND with 1000p
9. Functional Diagram ATTEN OUTA 5 BIT ATTENUATOR A MAXIM MAX2059 DRIVER AMP 5 BIT ATTENUATOR Dx co ATTEN OUTB GND GND Vcc GND GND ATTEN INB Chip Information Package Information PROCESS SiGe BICMOS For the latest package outline information go to www maxim ic com packages Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product No circuit patent licenses are implied Maxim reserves the right to change the circuitry and specifications without notice at any time 14 Maxim Integrated Products 120 San Gabriel Drive Sunnyvale CA 94086 408 737 7600 2006 Maxim Integrated Products MAXIM is a registered trademark of Maxim Integrated Products Inc
10. Hz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer Typical Operating Characteristics continued MAX2059 Typical Application Circuit Vcc 4 75V to 5 25V digital attenuators set for maximum gain 1700MHz lt fnr lt 2200MHZz 40MHZ lt fL o lt 100MHz Tc 40 C to 85 C Typical values are at Vcc 5 0V PIN OdBm far 1850MHZ fi o 95MHZ fL BOUT fnr flo and Tc 25 C unless otherwise noted REVERSE GAIN vs RF FREQUENCY ADJUSTING ATTEN A AND B MIXER CONV LOSS vs RF FREQUENCY MIXER CONV LOSS vs RF FREQUENCY 3 2 25 0 25 0 alb E 22 5 2 22 5 2 e E 200 200 5 ATTEN A AND B 0dB 2 2 z amp 5 amp 75 S 4 amp 5 gt gt Z 150 Z 150 c ce 70 iu 12 5 12 5 81dB 80 10 0 10 0 1500 1600 1700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz MIXER CONV LOSS vs RF FREQUENCY MIXER OUTPUT IP3 vs RF FREQUENCY MIXER OUTPUT IP3 vs RF FREQUENCY 25 0 8 10 3 10 x 3 9 g 225 E E 8 8 X3 200 2 8 7 amp 7 iani Zh
11. MHz x far lt 2200MHz 40MHz lt fLo 100MHz Tc 40 C to 85 C Typical values are at Vcc 5 0V PIN OdBm fnr 1850MHz fiL o 95MHz fL BOUT fre flo and Tc 25 C unless otherwise noted GAIN vs RF FREQUENCY GAIN vs RF FREQUENCY GAIN vs RF FREQUENCY MAXIMUM GAIN MAXIMUM GAIN ADJUSTING ATTEN A 14 5 14 8 15 10 i 10 5 i E SS S 8 g 8 S E z z 5 3 6 S 6 z PM UE 4 4 15 lli 0 0 25 Es 1500 1600 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz GAIN vs RF FREQUENCY ATTEN A ABS ACCURACY vs RF FREQUENCY ATTEN A REL ACCURACY vs RF FREQUENCY ADJUSTING ATTEN B 3 z 1 0 e i HETER 3 05 mee e e S E 1 RAE s s E m nma aS i 8 4 2 LEM ac 05 _ mj O E fe 2 amp Lu bia M 3 1 0 4 1 5 5 STATES 24 31dB ATTEN 6 2 0 1500 1600 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz ATTEN B ABS ACCURACY vs RF F
12. REQUENCY ATTEN B REL ACCURACY vs RF FREQUENCY OUTPUT IP3 vs RF FREQUENCY 3 5 1 0 E 35 2 2 i Pow i 8 05 E 33 E 0 0 z 32 a a S s a ceo e x 05 30 amp 2 5 e amp 5 29 3 1 0 S 9 4 1 5 24dB ATTEN B 5 STATES 24 31dB 26 ATTEN 6 2 0 25 1500 1600 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz Off chip tuning can improve performance for applications beyond 2200MHz Contact factory for details MAXL 5 6S80cXVM MAX2059 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer Typical Operating Characteristics continued MAX2059 Typical Application Circuit Vcc 4 75V to 5 25V digital attenuators set for maximum gain 1700MHz lt fnr lt 2200MHZz 40MHz lt fL o 100MHz Tc 40 C to 85 C Typical values are at Vcc 5 0V PiN OdBm fRF 1850MHZ fi o 95MHz fL BOUT fnr flo and Tc 25 C unless otherwise noted OUTPUT IP3 vs RF FREQUENCY NOISE FIGURE vs RF FREQUENCY NOI
13. S S 2175 6 Z og a 5 5 E E 5 E o Z 150 3 3 O 4 4 125 3 3 10 0 2 2 1700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz MIXER OUTPUT RETURN LOSS MIXER OUTPUT RETURN LOSS MIXER OUTPUT IP3 vs RF FREQUENCY vs RF FREQUENCY MIXER ENABLED vs RF FREQUENCY MIXER ENABLED 10 8 3 9 Pro 3dBm l P o o E 5 S g B Ta 5eC o z 8 2 1 CER Tc 40 C 2 1 15 E 15 z B o 5 P o D 4 Ea LE r pa E 5 E 35 E 25 3 3 3 4 Pio 6dBm G3 amp 3 3 3 Tc 25 C 35 Tc 485 C 2 4 4 i700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz AVLAZCLAI 7 6S0c XVIN MAX2059 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer Typical Operating Characteristics continued MAX2059 Typical Application Circuit Vcc 4 75V to 5 25V digital attenuators set for maximum gain 1700MHz lt fnr lt 2200MHZz 40MHz lt fL o 100MHz Tc 40 C to 85 C Typical values are at Vcc 5 0V Pin OdBm fRF 1850MHZ fi o 95MHz fL BOUT fre flo and Tc 25 C unless otherwise noted
14. SE FIGURE vs RF FREQUENCY 35 g 14 14 x 34 E 2 Voc 5 0V 3 E gg 5 12 12 3 Vec 5 25V E 32 ea ea S 31 16 10 p S 3 30 z 2 LLI LLI ES Vec 4 75V 2 8 2 8 lt lt 28 27 6 6 L Voc 4 75V 5 0V 5 25V 26 25 4 4 1700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz INPUT RETURN LOSS vs RF FREQUENCY OUTPUT P1dB vs RF FREQUENCY OUTPUT P1dB vs RF FREQUENCY ATTEN A VARIED 21 g 21 z 2 20 E 20 5 3 E s s 2 e 1 2 19 e 19 S S S 2 15 eo 8 e 18 z B Ls z 2 5 1 S 1 m E z E 5 S 3 z 6 16 3 5 15 35 4 14 4 1700 1800 1900 2000 2100 2200 2300 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz INPUT RETURN LOSS vs RF FREQUENCY OUTPUT RETURN LOSS vs RF FREQUENCY OUTPUT RETURN LOSS vs RF FREQUENCY ATTEN B VARIED ATTEN A VARIED ATTEN B VARIED 0 E 0 z 0 2 5 E B 10 3 2 215 P e S kJ wo 15 R 10 2 10 2 E E 20 Z amp 45 5 15 2 25 m E 5 30 T 20 z 2 E V E 5 35 H e e i 25 25 40 45 30 30 1500 1600 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz Off chip tuning can improve performance for applications beyond 2200MHz Contact factory for details 6 MAXIM 1700M
15. al and Spread Spectrum Communication Systems Microwave Terrestrial Links cdma2000 is a registered trademark of Telecommunications Industry Association cdmaOne is a trademark of CDMA Development Group SPI is a trademark of Motorola Inc MICROWIRE is a trademark of National Semiconductor Corp MAKIM Features 31 8dBm Typical Output IP3 18 4dBm Typical Output 1dB Compression Point 1700MHz to 2200MHz RF Frequency Range 700MHz to 1200MHz RF Frequency Range MAX2058 10 9dB Typical Small Signal Gain Includes Two Independent 5 Bit Digital Attenuator Stages Yielding 56dB of Total Gain Control Range with 1dB Steps 3 Wire SPI MICROWIRE Compatible Integrated Loopback Mixer for Tx Rx Self Diagnostics 5V Single Supply Operation 9 9 9 External Current Setting Resistors for Scalable Device Power Lead Free Package Available Ordering Information PART TEMP RANGE PIN PACKAGE 40 Thin QFN EP 6mm x 6mm MAX2059ET 40 C to 85 C 40 Thin QFN EP MAX2059E 6mm xem 40 C to 85 C MAX2059ETL MAX2059ETL EP Exposed paddle Denotes lead free package T Tape ana reel Pin Configuration Functional Diagram appears at end of data sheet Maxim Integrated Products 1 For pricing delivery and ordering information please contact Maxim Dallas Direct at 1 888 629 4642 or visit Maxim s website at www maxim ic com 6S0cXVIN MAX2
16. attenuators and or loopback mixer are used To disable the two stage amplifier ground or leave unconnected the amplifier supplies VCCBIAS2 VCCAMP VCCBIAS1 and also the inputs for setting the amplifier bias currents RSET1 RSET2 This reduces the supply current by approxi mately 187mA under typical conditions Loopback Mixer The MAX2059 loopback mixer uses a double balanced active architecture designed to operate with a 1700MHz to 2200MHz RF frequency range and a 40MHz to 100MHz LO frequency range The RF port of the mixer is connected internally with an on chip switch to the input of the first attenuator stage The mixer s IF port is matched for a single ended 50 impedance while the LO port requires a differential input impedance of 1000 The loopback mixer facilitates a self diagnostic mode for cellular transceivers whereby the Tx band signal at the input of the mixer can be translated up or down to the corresponding Rx band This translated signal can then be fed back to the radio s receiver for complete Tx Rx loop diagnostics The loopback mixer is enabled and disabled with LB EN Set LB EN to a logic low O to enable the mixer set LB EN to a logic high 1 to disable the mixer The MAX2059 loopback mixer accepts a nominal 6dBm LO input power and exhibits a 12 6dBm output power and an output IP3 of 6 2dBm PIN 5dBm Applications Information SPI Interface and Attenuator Settings The two 5 bit attenuators are programm
17. ed with the 3 wire SPI MICROWIRE compatible serial interface using 10 bit words Bit 9 of the 10 bit data is shifted in first along with all remaining data bits on the rising edge of the clock regardless of CS being high or low Once all the data bits are shifted in all will be sent to the attenua tors on the rising edge of CS thus changing the attenua tion state For standard SPI operation pull CS low for the 11 6SO0cXVIN MAX2059 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer duration of a valid 10 bit data set tewn This CS nega tive pulse width includes the setup time of the rising clock edge to CS transitioning high tes See Figure 1 The 5 MSBs of the 10 bit word program attenuator A and the 5 LSBs of the 10 bit word program attenuator B Each bit sets the attenuators to a corresponding attenuation level For example logic low O for bit 5 and bit O of attenuator A and B respectively sets both attenuators at 1dB 00000 configures both attenuators for maximum attenuation and 11111 sets for minimum attenuation See Table 1 for programming details External Bias Bias currents for the two stage amplifier and the loop back mixer are set and optimized with external resistors Resistor R1 pin 31 sets the bias current for the input amplifier R2 pin 20 sets the bias current for the output amplifier and R3 pin 40 sets the bias for the loopback mixer The external biasing
18. l values are at Vcc 5 0V PIN OdBm far 1850MHZ fi o 95MHZ fL BOUT fRF flo and Tc 25 C unless otherwise noted ATTEN B ONLY NO PC BOARD LOSS ATTEN B ONLY ATTEN B ONLY GAIN vs RF FREQUENCY ABS ACCURACY vs RF FREQUENCY REL ACCURACY vs RF FREQUENCY MAX2059 toc35 MAX2059 toc36 MAX2059 toc37 GAIN dB 8 ERROR dB ERROR dB c 24dB ATTEN STATES 24dB 31dB 2 0 1500 1600 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 1500 1600 1700 1800 1900 2000 2100 2200 2300 RF FREQUENCY MHz RF FREQUENCY MHz RF FREQUENCY MHz SUPPLY CURRENT vs SUPPLY VOLTAGE SUPPLY CURRENT vs SUPPLY VOLTAGE MIXER DISABLED MIXER ENABLED Tc 85 C Tc 25 C 230 t MAX2059 toc39 210 Tc 2 485 C Tc 425 C MAX2059 toc38 SUPPLY CURRENT mA ES SUPPLY CURRENT mA Tc 5 C Tc 40 C 160 180 4 150 4 875 5 000 25 5 250 4 150 4 875 5 000 5 125 5 250 Vcc V Voc V ce MAKIM 9 6S0c XVIN MAX2059 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer Pin Description FUNCTION Loopback Mixer Local Oscillator Positive Input Loopback Mixer Local Oscillator Negative Input Loopback Mixer Supply Voltage 5V supply for the internal loopback mixer Bypass to GND with 22p
19. oor PIN 5dBm dBc Hz L Li LBOUT to ATTEN_OUTB Isolation ATTEN_OUTB to LBOUT Isolation Mixer disabled Pin OdBm Mixer enabled attenuators A and B both set to 31dB PIN 5dBm Output Return Loss LO Port Return Loss 50Q source Mixer enabled 50Q load Mixer disabled 50Q load SERIAL PERIPHERAL INTERFACE SPI Maximum Clock Speed Data to Clock Hold Time Clock to CS Setup Time CS Positive Pulse Width CS Negative Pulse Width Clock Pulse Width Note 1 Note 2 Note 3 Note 4 Note 5 Note 6 Note 7 All limits include external component losses Output measurements taken at RFOUT or LBOUT ports of the Typical Application Circuit Operating outside this range is possible but with degraded performance of some parameters Compression point characterized It is advisable not to continuously operate the VGA RF input above 15dBm Input RF source contribution to spurious emissions Agilent ESG 4435B PSA E44434 200kHz 39 2dBc 400kHz 73 5dBc 600kHz 83 2dBc 1 2MHz 85 7dBc See the Applications Information section regarding effective attenuation range No SPI clock input applied Guaranteed by design and characterization MAALM 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer Typical Operating Characteristics MAX2059 Typical Application Circuit Vcc 4 75V to 5 25V digital attenuators set for maximum gain 1700
20. rating Characterisitcs Absolute Step Accuracy No RF input attenuator A stepped from 0 to 2dB 7dB to 9dB 15dB to 17dB O to 31aB Spurious Emissions in 300kKHz 31d0B to OGB with attenuator B at OdB Bandwidth attenuator B stepped from 0 to 2aB 7dB to 9dB 15aB to 17dB O to 31aB 31dB to OdB with attenuator A at OdB Note 6 MAKINI 3 6S0cXVMW MAX2059 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer AC ELECTRICAL CHARACTERISTICS continued MAX2059 Typical Application Circuit Vcc 4 75V to 5 25V digital attenuators set for maximum gain 1700MHz x fnr lt 2200MHZz 40MHz lt fj o 100MHz Tc 40 C to 85 C Typical values are at Vcc 5 0V Pin OdBm fRF 1850MHZz PLo 6dBm fio 95MHZz fi BOUT fFF fLO and Tc 25 C unless otherwise noted Note 1 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS From chip select transitioning high to the Switching Speed output settling to within 1dB of steady state output LOOPBACK MIXER LO Frequency fLo Note 2 LO Input Power Output Power 5dBm fnr 1850MHz Tc 25 C ote 7 in Accuracy put 3rd Order Intercept Point 5dBm Tc 1800MHz to 2000MHz 40 C to 85 C 2000MHz to 2200MHz o tones fRF1 1850MHZ fare 1850 2MHz 1 PIN2 2dBm Tc 25 C ON OFF Switching Time B_EN enable time B_EN disable time Tw P put Noise Fl
21. resistor values can be increased for reduced current operation at the expense of performance Contact the factory for details Board Layout The pin configuration of the MAX2059 has been opti mized to facilitate a very compact physical layout of the device and its associated discrete components The exposed padale EP of the MAX2059 s thin QFN EP package provides a low thermal resistance path to the die It is important that the PC board on which the MAX2059 is mounted be designed to conduct heat MAXIM MAX2021 MAX2022 MAX2023 MAXIM MAXIM MAX5873 DUAL DAC MAX4395 ZERO IF QUAD AMP MODS DEMODS from the EP In addition provide the EP with a low inductance path to electrical ground The EP MUST be soldered to a ground plane on the PC board either directly or through an array of plated via holes Table 2 Component List Referring to the Typical Application Circuit COMPONENT C1 C4 C10 C13 C16 C2 C3 C5 C8 C11 C14 C17 C24 C6 C19 C7 C18 C9 C12 C15 C20 C21 C22 VALUE DESCRIPTION 0 1uF icrowave capacitors 0603 icrowave capaci icrowave capaci 0 01uF 1000pF 0 75pF icrowave capaci icrowave capaci icrowave capaci icrowave capacitor 0402 1 resistor 0402 1 resistors 0402 1 resistor 0402 RF transformer 100 50 Mini Circuits TC2 1T MAX2059 MAXIM MAX2058 MAX2059 Figure 2 Direct Conve
22. rsion Transmitter for GSM EDGE Base Stations 12 MAXIMA RF DIGITAL VGAs LOOPBACK Rx SPI OUT OFF CONTROL FEEDS BACK INTO Rx CHAIN FRONT END MAX9491 VCO PLL MAKIN 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer Direct Conversion Base Station Transmitter The MAX2058 MAX2059 are designed to interface directly with Maxim s direct conversion quadrature modulators and high speed DACs to provide a com plete solution for GSM EDGE base station transmitter applications See Figure 2 The MAX2058 MAX2059 RF INPUT LO INPUT 5 BIT ATTENUATOR A together with the MAX2021 MAX2022 MAX2023 direct conversion modulators demodulators the MAX5873 dual channel DAC and the MAX4395 quad amplifier form an ideal total transmitter lineup This overall sys tem is highly efficient and low cost while maintaining high linearity and low noise performance Typical Application Circuit C14 MAXIM __ MAX2059 C12 C13 DRIVER AMP 2 lI 1 Vcc i 5 BIT ATTENUATOR P B d D IL C11 VCCBIAS2 i GND GND bas ATTEN_INB c o ATTEN OUTB ce S RF OUTPUT ot MAKIM 13 6SO0cXVIN MAX2059 1700MHz to 2200MHz High Linearity SPI Controlled DVGA with Integrated Loopback Mixer Pin Configuration
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MAXIM MAX2059 Manual(1)(1)