19-4431; Rev 0; 2/09 KIT ATION EVALU E L B AVAILA DirectDrive Video Amplifier with Short-to-Battery Protection 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 PIN-PACKAGE TEMP RANGE MAX9532AUB+ 10 µMAX -40°C to +125°C +Denotes a lead(Pb)-free/RoHS-compliant package. Pin Configuration and Functional Diagram/Typical Application Circuits appear at end of data sheet. Simplified Block Diagram MAX9532 500mVP-P VIDEO JACKSENSE OUT IN 2VP-P VIDEO LPF AV = 4V/V TRANSPARENT CLAMP 0V LINEAR REGULATOR CHARGE PUMP DirectDrive is a registered trademark of Maxim Integrated Products, Inc. µMAX is a registered trademark of Maxim Integrated Prodcuts, Inc. ________________________________________________________________ Maxim Integrated Products 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. 1 MAX9532 General Description The MAX9532 DirectDrive ® video filter amplifier is specifically designed to work in harsh environments such as automobiles. The MAX9532 provides integrated 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 0.5VP-P, and the output full-scale video signal is nominally 2VP-P. The short-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 µMAX® package and is specified over the -40°C to +125°C automotive operating temperature range. MAX9532 DirectDrive Video Amplifier with Short-to-Battery Protection ABSOLUTE MAXIMUM RATINGS VDD to GND ..............................................................-0.3V to +4V VDD to CPGND .........................................................-0.3V to +4V CPGND to GND.....................................................-0.1V to +0.1V IN to GND .................................................................-0.3V to +4V JACKSENSE to GND........................................The higher of VSS and -2V to (VSS + 22V) OUT to GND ............The higher of VSS and -1.5V to (VSS + 22V) VSS to CPVSS ........................................................-0.1V to +0.1V Continuous Current IN, JACKSENSE............................................................±20mA C1P, C1N, CPVSS ........................................................±50mA OUT ..............................................................................±50mA Continuous Power Dissipation (TA = +70°C) 10-Pin µMAX (derate 8.8mW/°C above +70°C) ........707.3mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C 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. ELECTRICAL CHARACTERISTICS (VDD = 3.3V, GND = CPGND = 0, RL = 100Ω to GND, C1 = C2 = C3 = 1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC-COUPLED INPUT Input Voltage Range VIN Guaranteed by output voltage swing 3V < VDD < 3.135V 0 0.5 Guaranteed by output voltage swing 3.135V < VDD < 3.6V 0 0.7 V Input Current IIN VIN = 0.5V 2 Input Resistance RIN 0.1V ≤ VIN ≤ 0.5V 5 3.3 µA MΩ SYNC-TIP CLAMP INPUT Sync-Tip Clamp Level VCLP Input Voltage Range Sync-tip clamp -6.2 -1.63 +3.5 Guaranteed by output voltage swing 3V < VDD < 3.135V 0 0.5 Guaranteed by output voltage swing VDD > 3.135V 0 0.7 Sync Crush Sync-tip clamp; percentage reduction in sync pulse (0.15VP-P, 75Ω source impedance), guaranteed by input clamping current measurement Input Clamping Current Sync-tip clamp mV VP-P 2 Max Input Source Resistance 2.3 % 3.3 µA Ω 300 GENERAL Supply Voltage Range VDD Guaranteed by PSRR 3.0 Quiescent Supply Current DC Voltage Gain Output Level 2 AV Guaranteed by output voltage swing VIN = 150mV 3.92 3.3 3.6 V 15 23 mA 4.08 V/V +0.150 V 4 -0.120 _______________________________________________________________________________________ DirectDrive Video Amplifier with Short-to-Battery Protection (VDD = 3.3V, GND = CPGND = 0, RL = 100Ω to GND, C1 = C2 = C3 = 1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL Output Voltage Swing CONDITIONS MIN TYP MAX Measured at output, VDD = 3.135V, VIN = VCLP to (VCLP + 0.7V), RL = 100Ω to -2V and +2V 2.744 2.8 2.856 Measured at output, VDD = 3V, VIN = VCLP to (VCLP + 0.5V), RL = 100Ω to -2V and +2V 1.96 VP-P Output Short-Circuit Current Output Resistance ROUT Short Circuit to Battery Current Short-to-battery, VOUT = 9V to 16V Power-Supply Rejection Ratio 3.0V ≤ VDD ≤ 3.6V Filter VIN = 0.5VP-P, reference frequency is 100kHz 2 2.04 90 mA 0.1 Ω 3 46 Attenuation at 5.5MHz UNITS 78 -1.29 mA dB +1 dB Attenuation at f = 27MHz 20 42 Differential Gain DG 5-step modulated staircase, f = 4.43MHz, RL = 100Ω to -2V and +2V 0.7 % Differential Phase DP 5-step modulated staircase, f = 4.43MHz, RL = 100Ω to -2V and +2V 0.5 deg 2T Pulse-to-Bar K Rating 2T = 200ns; bar time is 18µs; the beginning 2.5% and the ending 2.5% of the bar time is ignored; RL = 100Ω to -2V and +2V 0.5 K% 2T Pulse Response 2T = 200ns, RL = 100Ω to -2V and +2V 0.4 K% 2T Bar Response 2T = 200ns; bar time is 18µs; the beginning 2.5% and the ending 2.5% of the bar time is ignored; RL = 100Ω to -2V and +2V 0.1 K% Nonlinearity 5-step staircase; RL = 100Ω to -2V and +2V 0.1 % Group Delay Distortion 100kHz ≤ f ≤ 5MHz, outputs are 2VP-P; RL = 100Ω to -2V and +2V 13 ns Glitch Impulse Caused by Charge Pump Switching Measured at outputs, RL = 100Ω to -2V and +2V 40 pVs Peak Signal to RMS Noise 100kHz ≤ f ≤ 5MHz, RL = 100Ω to -2V and +2V 64 dB Power-Supply Rejection Ratio f = 100KHz, 100mVP-P; RL = 100Ω to -2V and +2V 47 dB Output Impedance f = 5MHz 2 Ω 250 kΩ JACKSENSE Input Resistance 120 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 7.3 8 8.7 20 4.9 10 V µs 20 ms _______________________________________________________________________________________ 3 MAX9532 ELECTRICAL CHARACTERISTICS (continued) ELECTRICAL CHARACTERISTICS (continued) (VDD = 3.3V, GND = CPGND = 0, RL = 100Ω to GND, C1 = C2 = C3 = 1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 220 440 660 kHz CHARGE PUMP Switching Frequency fCP Note 1: All devices are 100% production tested at TA = +25°C. Specifications over temperature limits are guaranteed by design. Typical Operating Characteristics (VDD = 3.3V, GND = CPGND = 0, video output has RL = 100Ω to GND, C1 = C2 = C3 = 1μF, TA = +25°C, unless otherwise noted.) SMALL-SIGNAL GAIN FLATNESS vs. FREQUENCY 0.8 0.6 0.4 -15 -20 -25 -10 0.2 GAIN (dB) GAIN (dB) -10 GAIN (dB) 0 -5 0 -0.2 -30 -0.6 -35 -35 -0.8 VIN = 0.025VP-P -40 VIN = 0.025VP-P -1.0 0.1 1 10 100 0.1 FREQUENCY (MHz) NOTE: GAIN VALUES (PLOTTED IN dB) ARE NORMALIZED VALUES RELATIVE TO THE EXPECTED VALUE OF 4V/V. 0 -0.2 -0.4 100 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 0 -10 VRIPPLE = 100mVP-P -20 60 -30 40 20 -40 -50 -60 -70 0 -0.6 -80 -20 -0.8 -90 VIN = 0.5VP-P VIN = 0.5VP-P -1.0 -100 -40 0.1 1 10 100 FREQUENCY (MHz) 0.1 1 10 FREQUENCY (MHz) 100 0.1 1 10 FREQUENCY (MHz) NOTE: GAIN VALUES (PLOTTED IN dB) ARE NORMALIZED VALUES RELATIVE TO THE EXPECTED VALUE OF 4V/V. 4 10 GROUP DELAY vs. FREQUENCY PSRR (dB) 0.2 1 FREQUENCY (MHz) NOTE: GAIN VALUES (PLOTTED IN dB) ARE NORMALIZED VALUES RELATIVE TO THE EXPECTED VALUE OF 4V/V. 80 GROUP DELAY (ns) 0.4 0.1 100 MAX9532 toc05 0.6 10 100 MAX9532 toc04 0.8 1 VIN = 0.5VP-P -40 FREQUENCY (MHz) NOTE: GAIN VALUES (PLOTTED IN dB) ARE NORMALIZED VALUES RELATIVE TO THE EXPECTED VALUE OF 4V/V. LARGE-SIGNAL GAIN FLATNESS vs. FREQUENCY 1.0 -20 -25 -0.4 -30 -15 MAX9532 toc06 0 -5 LARGE-SIGNAL GAIN vs. FREQUENCY 5 MAX9532 toc02 1.0 MAX9532 toc01 5 MAX9532 toc03 SMALL-SIGNAL GAIN vs. FREQUENCY GAIN (dB) MAX9532 DirectDrive Video Amplifier with Short-to-Battery Protection _______________________________________________________________________________________ 100 DirectDrive Video Amplifier with Short-to-Battery Protection QUIESCENT CURRENT vs. TEMPERATURE 4.018 4.016 14.67 4.014 14.66 GAIN (V/V) SUPPLY CURRENT (mA) 14.68 MAX9532 toc08 VSS = 3.3V VIN = 0V NO LOAD 14.69 DC GAIN vs. TEMPERATURE 4.020 MAX9532 toc07 14.70 14.65 14.64 14.63 4.012 4.010 4.008 4.006 14.62 14.61 4.004 14.60 4.002 4.000 14.59 -40 10 60 110 10 -40 TEMPERATURE (°C) OUTPUT VOLTAGE vs. INPUT VOLTAGE 0 -1 -2 0 0.2 0.4 0.6 0.8 1.0 1.0 MAX9532 toc10 DIFFERENTIAL GAIN (%) 1 DIFFERENTIAL PHASE (deg) OUTPUT VOLTAGE (V) 2 -0.2 110 DIFFERENTIAL GAIN AND PHASE MAX9532 toc09 AV = 4.012V/V 3 60 TEMPERATURE (°C) 0.5 0 f = 3.58MHz TA = +25°C -0.5 -1.0 1 2 3 4 6 5 7 DIFFERENTIAL PHASE 1.0 0.5 0 f = 3.58MHz TA = +25°C -0.5 -1.0 1 2 3 4 5 6 7 INPUT VOLTAGE (V) 2T RESPONSE DIFFERENTIAL PHASE (deg) MAX9532 toc12 MAX9532 toc11 DIFFERENTIAL GAIN (%) DIFFERENTIAL GAIN AND PHASE 1.0 f = 4.43MHz TA = +25°C 0.5 0 VIN 100mV/div -0.5 -1.0 1 2 3 4 6 5 7 DIFFERENTIAL PHASE 1.0 0.5 VOUT 400mV/div 0 f = 4.43MHz TA = +25°C -0.5 -1.0 1 2 3 4 5 6 7 100ns/div _______________________________________________________________________________________ 5 MAX9532 Typical Operating Characteristics (continued) (VDD = 3.3V, GND = CPGND = 0, video output has RL = 100Ω to GND, C1 = C2 = C3 = 1μF, TA = +25°C, unless otherwise noted.) MAX9532 DirectDrive Video Amplifier with Short-to-Battery Protection Typical Operating Characteristics (continued) (VDD = 3.3V, GND = CPGND = 0, video output has RL = 100Ω to GND, C1 = C2 = C3 = 1μF, TA = +25°C, unless otherwise noted.) 2T RESPONSE VIDEO TEST SIGNAL MAX9532 toc13 FIELD SQUARE-WAVE RESPONSE MAX9532 toc14 MAX9532 toc15 VIN 100mV/div VIN 200mV/div VOUT 400mV/div VOUT 800mV/div 400ns/div VIN 200mV/div VOUT 800mV/div 10μs/div OUTPUT SHORT-TO-BATTERY RESPONSE 2ms/div OUTPUT SHORT-TO-BATTERY RESPONSE MAX9532 toc16 MAX9532 toc17 VJACKSENSE 10V/div VJACKSENSE 10V/div 0V 0V VOUT 500mV/div VOUT 500mV/div 0V 0V 100μs/div 6 2ms/div _______________________________________________________________________________________ DirectDrive Video Amplifier with Short-to-Battery Protection PIN NAME 1 VDD Positive Power Supply. Bypass VDD with a 1µF capacitor to GND. FUNCTION 2 C1P Charge-Pump Flying Capacitor Positive Terminal. Connect a 1µF ceramic capacitor from C1P to C1N. 3 CPGND Charge-Pump Ground. Connect to GND. Charge-Pump Flying Capacitor Negative Terminal. Connect a 1µF ceramic capacitor from C1P to C1N. 4 C1N 5 CPVSS 6 VSS Negative Power Supply. Connect VSS to CPVSS. OUT Video Output 7 8 Charge-Pump Negative Power Supply. Bypass CPVSS with a 1µF ceramic capacitor in parallel with a 10nF low ESL capacitor to GND. JACKSENSE Jack-Sense Input. Connect to the video output connector after the back-termination resistor. 9 GND 10 IN Ground Video Input Detailed Description The MAX9532 DirectDrive video amplifier with short-tobattery 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 0.5V P-P . Integrated 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 creates 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 positive 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 capacitor 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 220µF to 3000µF. For space-constrained equipment, the series capacitor is unacceptable. Changing from a single series capacitor to a SAG network that requires two smaller capacitors can only reduce space and cost slightly. Video 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 voltage 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 150Ω). For example, Figure 1 shows an ACcoupled video signal alternating between a completely black screen and a completely white screen. Notice the excursion of the video signal as the screen changes. _______________________________________________________________________________________ 7 MAX9532 Pin Description MAX9532 DirectDrive Video Amplifier with Short-to-Battery Protection INPUT 500mV/div INPUT 500mV/div 0V OUTPUT 500mV/div 2ms/div 0V OUTPUT 1V/div 2ms/div Figure 1. AC-Coupled Output Figure 2. DirectDrive 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. prototyping and applications where the amplifier output can be directly shorted to ground. The MAX9532 features an internal five-pole, Butterworth lowpass filter to condition the video signal. The reconstruction 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 filter typically provides ±1dB passband flatness of 9.5MHz and 42dB attenuation at 27MHz. To protect the device from output short circuits to voltages higher than the supply voltage VDD, the MAX9532 utilizes an internal switch in series with the amplifier output. When the JACKSENSE input detects that the output connector of the circuit is shorted to the battery voltage (up to 18V) higher than the internal 8V threshold, an internal comparator disables the switch in 10µs (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 normal operation 10ms after the short is removed. Transparent Sync-Tip Clamp Applications Video Reconstruction Filter The MAX9532 contains an integrated, transparent synctip 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 ACcoupled input, the sync-tip clamp automatically clamps the input signal to ground, preventing the input signal from going lower. A low current of 2µA 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 50Ω or 75Ω back-termination resistor that limits short-circuit current when an external short is applied to the video output. The MAX9532 also features an internal output short-circuit protection to prevent device damage in 8 Power Consumption Quiescent power consumption is defined when the MAX9532 is operating without load. In this case, the MAX9532 consumes about 47.355mW. Average power consumption, when the MAX9532 drives a 100Ω and 150Ω 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 black and a video signal that is all white. The power consumption with 75% color bars and 50% flat field lies in between the extremes. _______________________________________________________________________________________ DirectDrive Video Amplifier with Short-to-Battery Protection IMAGE PROCESSOR ASIC 0V TO 1V MAX9532 GENERIC 2V/V CONFIGURATION IMAGE PROCESSOR ASIC MAX9532 0V TO 0.5V DAC LPF 2V/V DAC 2VP-P 150Ω Figure 3. Typically, a Video DAC Generates a 1VP-P Signal Across a 150Ω Resistor Connected to Ground LPF 4V/V 2VP-P 75Ω Figure 4. Video DAC Generates a 0.5VP-P Signal Across a 75Ω Resistor Connected to Ground Table 1. Power Consumption of the MAX9532 with Different Video Signals MAX9532 POWER CONSUMPTION (mW) WITH 150Ω LOAD MAX9532 POWER CONSUMPTION (mW) WITH 100Ω LOAD All Black Screen 51.236 53.978 All White Screen 57.077 65.399 75% Color Bars 53.074 57.486 50% Flat Field 49.513 51.596 VIDEO SIGNAL 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 0V to 1V across a 150Ω 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 MAX9532 by scaling down the 150Ω resistor to a 75Ω resistor, as shown in Figure 4. The 75Ω resistor is one-half the size of the 150Ω 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 signal 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 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 chroma 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 0V to 0.7V DC-coupled input range. Video Signal Routing Minimize the length of the PCB trace between the output of the video DAC and the input of the MAX9532 to reduce coupling of external noise into the video signal. If possible, shield the PCB trace. _______________________________________________________________________________________ 9 MAX9532 DirectDrive Video Amplifier with Short-to-Battery Protection VDD VIDEO ASIC DAC MAX9532 JACKSENSE AV = 4V/V Y OUT IN AMP LPF 50Ω 0.1μF DAC C 50Ω 3.3V CLAMP VDD C3 1μF LINEAR REGULATOR DC LEVEL SHIFT CHARGE PUMP GND CPGND C1P C1N CPVSS VSS C2 1μF || 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 possible to the device. Proper grounding improves performance and prevents any switching noise from coupling into the video signal. 10 Bypass the analog supply (VDD) with a 1µF capacitor to GND, placed as close as possible to the device. Bypass CPVSS to GND with a 1µF ceramic capacitor in parallel with a 10nF low-ESR capacitor. The bypass capacitors should be placed as close as possible to the device. ______________________________________________________________________________________ DirectDrive Video Amplifier with Short-to-Battery Protection VDD VIDEO ASIC MAX9532 JACKSENSE AV = 4V/V OUT IN DAC MAX9532 Functional Diagram/Typical Application Circuits (DC-Coupled Input/Inactive Input Clamp) AMP LPF 50Ω 50Ω 3.3V VDD TRANSPARENT CLAMP C3 1μF DC LEVEL SHIFT LINEAR REGULATOR CHARGE PUMP GND CPGND C1P C1N C1 1μF CPVSS VSS C2 1μF || 10nF Chip Information Pin Configuration PROCESS: BiCMOS TOP VIEW + VDD 1 C1P 10 IN 2 MAX9532 9 GND CPGND 3 8 JACKSENSE C1N 4 7 OUT CPVSS 5 6 VSS μMAX ______________________________________________________________________________________ 11 Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 10 µMAX U10+2 21-0061 10LUMAX.EPS MAX9532 DirectDrive Video Amplifier with Short-to-Battery Protection α α 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.