MAXIM MAX9532 handbook
Contents
1. SMALL SIGNAL GAIN vs FREQUENCY vs FREQUENCY LARGE SIGNAL GAIN vs FREQUENCY 5 5 1 0 5 3 0 8 08 E E F 3 06 E E 10 0 4 4 8 15 g v 8 5 z z 0 amp 20 3 S 20 25 d 25 30 06 3 35 08 35 Vin 0 025Vp p Vin 0 025Vp p Vin 0 5Vp p 40 1 0 40 01 10 100 04 1 10 100 01 i 0 100 FREQUENCY MHz FREQUENCY MHz FREQUENCY MHz NOTE GAIN VALUES PLOTTED IN dB ARE NORMALIZED NOTE GAIN VALUES PLOTTED IN dB ARE NORMALIZED NOTE GAIN VALUES PLOTTED IN dB ARE NORMALIZED VALUES RELATIVE TO THE EXPECTED VALUE OF 4V V VALUES RELATIVE TO THE EXPECTED VALUE OF 4V V VALUES RELATIVE TO THE EXPECTED VALUE OF 4V V LARGE SIGNAL GAIN FLATNESS POWER SUPPLY REJECTION RATIO vs FREQUENCY GROUP DELAY vs FREQUENCY vs FREQUENCY 10 m z Vuene 100V E S B PLE 100mVp B 0 8 3 E 4o DARE P P 2 80 E E 0 6 3 20 0 4 2 9 80 g a4 g 0 It o Lh all 2 0 s gt Ed 50 0 2 o i 60 5 0 4 70 0 6 80 20 08 Eu Ue Vin 0 5Vp p 90 1 0 40 100 01 10 100 04 1 0 100 04 1 0 100 FREQUENCY MHz FREQUENCY MHz FREQUENCY MHz NOTE GAIN VALUES PLOTTED IN dB ARE NORMALIZED VALUES RELATIVE TO THE EXPECTED VALUE OF 4V V 4 MAXIM DirectDrive Video Amplifier with Short to Battery Protection Typical Operating Characteristics continued Vpp 3 3V VaND VCPGND OV video output has RL 1000 to GND C1 C2 C3 1uF TA2. 25 C unless otherwise noted QUIESCENT CURRENT vs TEMPERATURE DC GAIN vs TEMPERATURE 14 70 S 4 020 Vss 3 3V E E 14 69 Vin OV E 4 018 E 1468 NOLOAD 3 4016 guo Ant iz 14 66 S 4012 cc gt e m 214 64 Ss 814 63 214 A005 1461 4 004 14 60 4 002 14 59 4 000 40 1 60 110 40 10 60 110 EMPERATURE C EMPERATURE C OUTPUT VOLTAGE vs INPUT VOLTAGE DIFFERENTIAL GAIN AND PHASE MAX9532 toc10 f 3 58MHz Ta 25 C 2 3 4 5 6 7 DIFFERENTIAL PHASE fs 3 58MHz Ta 25 C 1 2 3 4 5 6 7 OUTPUT VOLTAGE V No Eis e a i w N DIFFERENTIAL PHASE deg DIFFERENTIAL GAIN gt os gt os c on ee cn cC ce cn ce en co INPUT VOLTAGE V DIFFERENTIAL GAIN AND PHASE 2T RESPONSE MAX9532 toc12 100ns div f 443MHz 8 amp 95 FT 425 C g z 0 amp 05 VIN mi 100mV div E 40 G 1 2 83 4 5 6 7 SS I t i ES MA Vour x t 400mV div z i E i lu 1 e F E t MAXIM 5 cESEXVIN MAX9532 DirectDrive Video Amplifier with Short to Battery Protection Typical Operating Characteristics continued Vpp 3 3V VaND VCPGND OV video output has RL 1000 to GND C4 C2 C3 1uF TA 25 C unless otherwise noted 2T RESPONSE VIDEO TEST SIGNAL FIELD S
3. Amplifier When the full scale video signal from a video DAC is 500mV the black level of the video signal created by the video DAC is around 150mV The MAX9532 shifts the black level to near ground at the output so that the active video is above ground and the sync is below ground The amplifier needs a negative supply for the output stage to remain in the linear region when driving sync below ground The MAX9532 includes an integrated charge pump and linear regulator to create a low noise negative supply from the positive supply voltage The charge pump inverts the positive supply to create a raw negative volt age that is then fed into the linear regulator filtering out the charge pump noise Comparison Between DirectDrive Output and AC Coupled Output The actual level of the video signal varies less with a DirectDrive output than with an AC coupled output The average video signal level changes depending upon the picture content With an AC coupled output the average level changes according to the time constant formed by the series capacitor and series resistance usually 1509 For example Figure 1 shows an AC coupled video signal alternating between a completely black screen and a completely white screen Notice the excursion of the video signal as the screen changes c S6XVII MAX9532 DirectDrive Video Amplifier with Short to Battery Protection INPUT 500mV div OUTPUT Ay 500mV div 2ms div Figure 1 AC Co
4. Amplifier with Short to Battery Protection Package Information For the latest package outline information and land patterns footprints go to www maxim ic com packages Note that a or in the package code indicates RoHS status only Package drawings may show a different suffix character but the drawing pertains to the package regardless of RoHS status PACKAGE TYPE PACKAGE CODE OUTLINE NO LAND PATTERN NO INCHES MILLIMETERS MIN MAX MIN MAX 0 043 1 10 0 002 0 006 0 05 0 15 0 030 0 037 0 75 0 95 0 116 0 120 2 95 3 05 AAAA 0 114 0 118 2 89 3 00 0 116 0 120 2 95 3 05 90 50 0 1 0 114 0 118 2 89 3 00 0 187 0 199 4 75 5 05 0 0157 0 0275 0 40 0 70 j 0 037 REF 0 940 REF 0 007 0 0106 0 177 0 270 meee 0 0197 BSC 0 500 BSC Sees 0 0035 0 0078 0 090 0 200 TOP VIEW BOTTOM VIEW 0 0196 REF 0 498 REF o 6 o 6 Pkg Codes U10 2 U10CN 1 GAGE PLANE Mi LS ena FRONT V F El L SIDE VIEW NOTES D amp E DO NOT INCLUDE MOLD FLASH MOLD FLASH OR PROTRUSIONS NOT TO EXCEED 015mm 006 1 2 3 CONTROLLING DIMENSION
5. MAX9532 by scaling down the 150Q resistor to a 75Q resistor as shown in Figure 4 The 75Q resistor is one half the size of the 1500 resistor resulting in a video signal that is one half the amplitude Video Source with a Positive DC Bias In some applications the video source generates a sig nal with a positive DC voltage bias i e the sync tip of the signal is well above ground Figure 5 shows an example in which the outputs of the luma Y DAC and the chroma C DAC are connected together Since the MAXIM DACs are current mode the output currents sum together into the resistor which converts the resulting current into a voltage representing a composite video signal When the chroma DAC is connected to an independent output resistor to ground the chroma signal which is a carrier at 3 58MHz for NTSC or at 4 43MHz for PAL generates a positive DC bias to keep the signal above ground at all times When the luma DAC is connected to an independent output resistor to ground the luma signal usually does not have a positive DC bias and the sync tip is at approximately ground When the chro ma and luma signals are added together the resulting composite video signal generates a positive DC bias Therefore the signal must be AC coupled into the MAX9532 because the composite video signal is above the nominal OV to 0 7V DC coupled input range Video Signal Routing Minimize the length of the PCB trace between the out put of the vid
6. MILLIMETERS Ss 4 COMPLIES TO JEDEC MO 187 LATEST REVISION VARIATION BA 5 6 MARKING SHOWN IS FOR PKG ORIENTATION ONLY TE ALL DIMENSIONS APPLY TO BOTH LEADED lt gt AND PbhFREE PKG CODES PACKAGE OUTLINE 10L uMAX uSOP DOCUMENT CONTROL NO DRAWING NOT TO SCALE 21 0061 12 MAXIM DirectDrive Video Amplifier with Short to Battery Protection Revision History REVISION REVISION NUMBER DATE 2 09 Initial release Added automotive qualified part DESCRIPTION PAGES CHANGED Updated part number to show tape and reel designation 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 Maxim Integrated Products 120 San Gabriel Drive Sunnyvale CA 94086 408 737 7600 13 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products Inc cESEXVIN
7. QUARE WAVE RESPONSE MAX9532 toc13 MAX9532 toc14 MAX9532 toc15 Vin Vin VIN 100mvV div 200mV div 200mV div Vour Vout Vout 800mV div 400mV div 800mV div 400ns div 10us div 2ms div OUTPUT SHORT TO BATTERY OUTPUT SHORT TO BATTERY RESPONSE RESPONSE MAX9532 toc16 MAX9532 toc17 VJACKSENSE VJACKSENSE 10V div 10V div OV OV Vout Vor I 500mv div 500mV div ov a OV 100us div 2ms div 6 MAXIM DirectDrive Video Amplifier with Short to Battery Protection Pin Description FUNCTION Positive Power Supply Bypass Vpp with a 1uF capacitor to GND Charge Pump Flying Capacitor Positive Terminal Connect a 1uF ceramic capacitor from C1P to C1N Charge Pump Ground Connect to GND CAN 10nF low ESL capacitor to GND Charge Pump Flying Capacitor Negative Terminal Connect a 1uF ceramic capacitor from C1P to Charge Pump Negative Power Supply Bypass CPVSS with a 1uF ceramic capacitor in parallel with a 6 Negative Power Supply Connect Vss to CPVSS 7 OUT Video Output JACKSENSE Jack Sense Input Connect to the video output connector after the back termination resistor Ground IN Video Input Detailed Description The MAX9532 DirectDrive video amplifier with short to battery protection features an internal 5 pole Butterworth lowpass filter with the amplifier configured with a gain of 4 The MAX9532 accepts DC coupled or AC coupled full scale input signals of O 5Vp p Int
8. VcLP to VCLP 0 7V RL 1000 to 2 744 2 8 2 856 Output Voltage Swing 2V and 2V Measured at output Vpp 3V VIN VCLP to VcLp 0 5V RL 100Q to 2V and 2V Output Short Circuit Current Output Resistance Short Circuit to Battery Current Short to battery VouT 9V to 16V Power Supply Rejection Ratio 3 0V lt Vpp lt 3 6V Attenuation at VIN 0 5Vp p reference 9 9MHz reguencyis 100kriz Attenuation at f 27MHz 5 step modulated staircase f 4 43MHz terential Gain RL 1000 to 2V and 2V 5 step modulated staircase f 4 43MHz orential Riase RL 1000 to 2V and 2V 2T 200ns bar time is 18us the beginning T Pulse to Bar K Rating 2 5 and the ending 2 5 of the bar time is ignored RL 100Q to 2V and 2V T Pulse Response 2T 200ns RL 100Q to 2V and 2V 2T 200ns bar time is 18us the beginning T Bar Response 2 5 and the ending 2 5 of the bar time is ignored RL 100Q to 2V and 2V Nonlinearity 5 step staircase RL 100Q to 2V and 2V 100kHz lt f 5MHz outputs are 2Vp p Group Delay Distortion RL 1000 to 2V and 2V Glitch Impulse Caused by Measured at outputs RL 100Q to 2V and Charge Pump Switching 2V 100kHz lt f lt 5MHz RL 1002 to 2V and 2V f 100kHz 100mVp p RL 100Q to 2V and 2V Peak Signal to RMS Noise Power Supply Rejection Ratio Output Impedance f 5MHz JACKSENSE Input Resistanc
9. ducts Inc UMAX is a registered trademark of Maxim Integrated Prodcuts Inc MAXIM Maxim Integrated Products 1 For pricing delivery and ordering information please contact Maxim Direct at 1 888 629 4642 or visit Maxim s website at www maxim ic com cESEXVIN MAX9532 DirectDrive Video Amplifier with Short to Battery Protection ABSOLUTE MAXIMUM RATINGS VDD TOIGIN Dis ie etd tette o te eet dto bte 0 3V to 4V Continuous Power Dissipation Ta 70 C Npp to GPONI DI iii totes a E ea 0 3V to 4V 10 Pin MAX derate 8 8mW C above 70 C 707 3mW CPGND to GND 70 1V to 0 1V Operating Temperature Range sss 40 C to 125 C NIN TO GND resent ERE 0 3V to 4V JUNCTION Temperature iirin eiin JACKSENSE to GND The higher of Vss Storage Temperature Range sssss and 2V to Vss 22V Lead Temperature soldering 10s OUT to GND The higher of Vss and 1 5V to Vss 22V Soldering Temperature reflow VSS O OPVO Se uide d ecd se edad ede Soutien 0 1V to 0 1V Continuous Current IN JACKSENSE 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 extend
10. e BATTERY DETECTION Threshold Accuracy Referred to GND Video Output Disconnect Time After detection of short to battery Video Output Connect Time After short to battery has been removed MAXIM 3 c S6XVIN MAX9532 DirectDrive Video Amplifier with Short to Battery Protection ELECTRICAL CHARACTERISTICS continued Vpp 3 3V VGND VcPGND OV RL 1000 to GND C4 C2 C3 pF TA Tmin to Tmax unless otherwise noted Typical val ues are at Ta 25 C Note 1 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CHARGE PUMP Note 1 All devices are 100 production tested at Ta 25 C Specifications over temperature limits are guaranteed by design Typical Operating Characteristics Vpp 3 3V VaND VCPGND OV video output has RL 100Q to GND C1 C2 C3 1uF TA 25 C unless otherwise noted SMALL SIGNAL GAIN FLATNESS
11. ed periods may affect device reliability ELECTRICAL CHARACTERISTICS Vpp 3 3V VGND VcPGND OV RL 100Q to GND C4 C2 C3 1pF TA Tmin to Tmax unless otherwise noted Typical val ues are at Ta 25 C Note 1 PARAMETER SYMBOL CONDITIONS DC COUPLED INPUT Guaranteed by output voltage swing 3V Vpp 3 135V Input Voltage Range Guaranteed by output voltage swing 3 135V Vpp 3 6V Input Current VIN 0 5V Input Resistance 0 1V ViN 0 5V SYNC TIP CLAMP INPUT Sync Tip Clamp Level Sync tip clamp Guaranteed by output voltage swing 3V Vpp 3 135V Input Voltage Range Guaranteed by output voltage swing Vpp 3 135V Sync tip clamp percentage reduction in sync pulse 0 15Vp p 75Q source impedance guaranteed by input clamping current measurement Sync Crush Input Clamping Current Sync tip clamp Max Input Source Resistance GENERAL Supply Voltage Range Guaranteed by PSRR Quiescent Supply Current DC Voltage Gain Guaranteed by output voltage swing Output Level VIN 150mV 2 MAAKLM DirectDrive Video Amplifier with Short to Battery Protection ELECTRICAL CHARACTERISTICS continued Vpp 3 3V VGND VcPGND OV RL 1000 to GND C4 C2 C3 1pF TA Tmin to Tmax unless otherwise noted Typical val ues are at Ta 25 C Note 1 PARAMETER SYMBOL CONDITIONS MIN TYP MAX Measured at output Vpp 3 135V VIN
12. eee JALUATION KIT E AVAILABLE MA AALMNVI DirectDrive Video Amplifier with Short to Battery Protection General Description The MAX9532 DirectDrive video filter amplifier is specifically designed to work in harsh environments such as automobiles The MAX9532 provides integrat ed short to battery protection allowing the output of the device to survive shorts up to 18V Maxim s DirectDrive technology eliminates large output coupling capacitors and sets the output video black level near ground DirectDrive requires an integrated charge pump and an internal linear regulator to create a clean negative power supply so that the amplifier can pull the sync below ground The charge pump injects so little noise into the video output that the picture is visibly flawless The MAX9532 features an internal reconstruction filter that smoothes the steps and reduces the spikes on the video signal from the video digital to analog converter DAC The reconstruction filter typically provides 1dB passband flatness of 9 5MHz and 42dB attenuation at 27MHz The input of the MAX9532 can be directly connected to the output of a video DAC The MAX9532 also features a transparent input sync tip clamp allowing AC coupling of input signals with different DC biases The MAX9532 features an internal fixed gain of 4V V The input full scale video signal is nominally O 5Vp p and the output full scale video signal is nominally 2Vp p The short
13. egrated short to battery protection prevents the MAX9532 from being damaged when the output is short circuited to the battery in automotive applications DirectDrive Background Integrated video filter amplifier circuits operate from a single supply The positive power supply usually cre ates video output signals that are level shifted above ground to keep the signal within the linear range of the output amplifier For applications where the positive DC level is not acceptable a series capacitor can be inserted in the output connection to eliminate the posi tive DC level shift The series capacitor cannot truly level shift a video signal because the average level of the video varies with picture content The series capaci tor biases the video output signal around ground but the actual level of the video signal can vary significantly depending upon the RC time constant and the picture content The series capacitor creates a highpass filter Since the lowest frequency in video is the frame rate which is between 24Hz and 30Hz the pole of the highpass filter is ideally an order of magnitude lower in frequency than the frame rate Therefore the series capacitor must be very large typically from 220uF to 3000pF For space constrained equipment the series capacitor is MAXIM unacceptable Changing from a single series capacitor to a SAG network that requires two smaller capacitors can only reduce space and cost slightly Video
14. eo DAC and the input of the MAX9532 to reduce coupling of external noise into the video signal If possible shield the PCB trace c S6XVII MAX9532 DirectDrive Video Amplifier with Short to Battery Protection MAXIM MAX9532 JACKSENSE LINEAR REGULATOR T luF Il 10nF Figure 5 Luma Y and Chroma C Signals are Added Together to Create a Composite Video Signal Which is AC Coupled into the MAX9532 Power Supply Bypassing and Ground Management The MAX9532 operates from a 3V to 3 6V single supply and requires proper layout and bypassing For the best performance place the components as close as possi ble to the device Proper grounding improves performance and prevents any switching noise from coupling into the video signal 10 Bypass the analog supply Vpp with a 1uF capacitor to GND placed as close as possible to the device Bypass CPVSS to GND with a 1uF ceramic capacitor in parallel with a 10nF low ESR capacitor The bypass capacitors should be placed as close as possible to the device MAXIM DirectDrive Video Amplifier with Short to Battery Protection Functional Diagram Typical Application Circuits DC Coupled Input Inactive Input Clamp TRANSPARENT Pin Configuration TOP VIEW JACKSENSE OUT Vss MAXIM DC L MAXIM MAX9532 JACKSENSE LINEAR REGULATOR Chip Information PROCESS BiCMOS cESEXVIN MAX9532 DirectDrive Video
15. lack and a video signal that is all white The power consumption with 75 color bars and 50 flat field lies in between the extremes MAXIM DirectDrive Video Amplifier with Short to Battery Protection GENERIC 2V V CONFIGURATION LPF a FN Figure 3 Typically a Video DAC Generates a 1Vp p Signal Across a 150Q Resistor Connected to Ground PROCESSOR ASIC i OVTO1V MAXIM PROCESSOR MAX9532 ASIC 0V TO 0 5V Figure 4 Video DAC Generates a 0 5Vp p Signal Across a 75Q Resistor Connected to Ground Table 1 Power Consumption of the MAX9532 with Different Video Signals VIDEO SIGNAL WITH 1509 LOAD MAX9532 POWER CONSUMPTION mW MAX9532 POWER CONSUMPTION mW WITH 1009 LOAD All Black Screen 51 236 53 978 57 077 All White Screen 75 Color Bars 65 399 50 Flat Field Note The supply voltage is 3 3V Interfacing to Video DACs that Produce Video Signals Higher than 0 5Vp p Devices designed to generate 1Vp p video signals at the output of the video DAC can work with the MAX9532 Most video DACs source current into a ground referenced resistor which converts the current into a voltage Figure 3 shows a video DAC that creates a video signal from OV to 1V across a 1500 resistor With a gain of 2V V the following video filter produces a 2Vp P output The MAX9532 accepts input signals that are 0 5Vp p nominally The video DAC in Figure 3 can be made to work with the
16. to battery protection utilizes an internal switch in series with the amplifier output When the MAX9532 detects that the output is short circuited to the battery voltage the internal switch is disabled protecting the MAX9532 from voltages up to 18V The MAX9532 is available in a 3mm x 3mm 10 pin UMAX package and is specified over the 40 C to 125 C automotive operating temperature range Features Short to Battery Protection on Video Output Up to 18V DirectDrive Sets Video Output Black Level Near Ground DirectDrive Eliminates DC Blocking Capacitors at the Output 3 3V Single Supply Operation Reconstruction Filter with 9 5MHz Passband and 42dB Attenuation at 27MHz DC Coupled Input Output Transparent Input Sync Tip Clamp 4V V Internal Fixed Gain Applications Automotive Infotainment Systems Ordering Information PART MAX9532AUB N T PIN PACKAGE TEMP RANGE 10 uMAX 40 C to 125 C MAX9532AUB 10 uMAX 40 C to 125 C Denotes a lead Pb free ROHS compliant package V denotes an automotive qualified part T Tape and reel Pin Configuration and Functional Diagram Typical Application Circuits appear at end of data sheet Simplified Block Diagram MAXIM MAX9532 Ay AVN A 500mVp p VIDEO TRANSPARENT CLAMP JACKSENSE 2Vp p VIDEO LINEAR REGULATOR CHARGE PUMP DirectDrive is a registered trademark of Maxim Integrated Pro
17. upled Output With the DirectDrive amplifier the black level is held at ground The video signal is constrained between 0 3V to 0 7V Figure 2 shows the video signal from a DirectDrive amplifier with the same input signal as the AC coupled system Video Reconstruction Filter The MAX9582 features an internal five pole Butterworth lowpass filter to condition the video signal The recon struction filter smoothes the steps and reduces the spikes created whenever the DAC output changes value In the frequency domain the steps and spikes cause images of the video signal to appear at multiples of the sampling clock frequency The reconstruction fil ter typically provides 1dB passband flatness of 9 5MHz and 42dB attenuation at 27MHz Transparent Sync Tip Clamp The MAX9532 contains an integrated transparent sync tip clamp When using a DC coupled input the sync tip clamp does not affect the input signal as long as the input signal remains above ground When using an AC coupled input the sync tip clamp automatically clamps the input signal to ground preventing the input signal from going lower A low current of 2uA pulls down on the input to prevent an AC coupled signal from drifting outside the input range of the device Short Circuit and Short to Battery Protection The MAX9532 typical operating circuit includes a 500 or 75Q back termination resistor that limits short circuit current when an external short is applied to the video o
18. utput The MAX9532 also features an internal output short circuit protection to prevent device damage in 8 INPUT 500mV div OUTPUT 1V div 2ms div Figure 2 DirectDrive Output prototyping and applications where the amplifier output can be directly shorted to ground To protect the device from output short circuits to volt ages higher than the supply voltage Vpp the MAX9532 utilizes an internal switch in series with the amplifier out put When the JACKSENSE input detects that the out put connector of the circuit is shorted to the battery voltage up to 18V higher than the internal 8V thresh old an internal comparator disables the switch in 10us typ preventing the MAX9532 from being damaged After the output is shorted to a battery the output immediately resumes normal operation when the short is removed within 1ms When the output is shorted to the battery for longer than 1ms the output resumes nor mal operation 10ms after the short is removed Applications Power Consumption Quiescent power consumption is defined when the MAX9582 is operating without load In this case the MAX9532 consumes about 47 355mW Average power consumption when the MAX9532 drives a 1000 and 1500 load to ground with a 50 flat field is about 51 596mW and 49 513mW respectively Table 1 shows the power consumption with different video signals Notice that the two extremes in power consumption occur with a video signal that is all b
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MAXIM MAX9532 handbook