19-3675; Rev 0; 5/05 DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch The MAX9505 filters and amplifies standard-definition video signals. Maxim’s DirectDrive™ technology eliminates large output-coupling capacitors and sets the video black level to ground. An internal reconstruction filter smoothes the steps and reduces the spikes on the video signal from the video digital-to-analog converter (DAC). The input of the MAX9505 can be directly connected to the output of a DAC. The MAX9505 provides a compact, integrated, and low-power solution. The reconstruction filter typically has 3dB attenuation at 9MHz and 50dB attenuation at 27MHz, and ±1dB passband flatness to 5.5MHz. Maxim’s DirectDrive uses an integrated charge pump and a linear regulator to create a negative power supply to drive the sync below ground. The charge pump injects so little noise into the video output that the picture is visibly flawless. The MAX9505 features an internal 1.7Ω analog switch that interfaces with a 4-pole multimedia jack. This switch allows one of the poles to be set as a video input, a video output, or a microphone input. The MAX9505 is offered in space-saving 16-pin QSOP and 16-pin TQFN packages and is specified over the -40°C to +85°C extended temperature range. Features ♦ DC-Coupled Output ♦ Direct Connection to Video DAC ♦ Video Output Black Level Set to Ground ♦ Video Reconstruction Filter with 50dB Attenuation at 27MHz ♦ 6dB Gain ♦ 1.7Ω RON Analog Switch ♦ 10nA Shutdown Supply Current ♦ 2.7V to 3.6V Single-Supply Operation Ordering Information PART* PINPACKAGE PKG CODE TOP MARK MAX9505EEE 16 QSOP E16-4 — MAX9505ETE 16 TQFN T1633-4 ACW *All devices are specified over the -40°C to +85°C operating temperature range. Applications Mobile Phones/Smartphones Space-Constrained, Low-Power Audio/Video Portable Devices Functional Diagram/Typical Operating Circuit and Pin Configurations appear at end of data sheet. Block Diagram MAX9505 0 TO 50mV 0V BUFFER VIDIN -0.1V TO +0.1V SIN SOUT 0V 6dB LOWPASS FILTER AMP VIDOUT LINEAR REGULATOR CHARGE PUMP ________________________________________________________________ Maxim Integrated Products 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. 1 MAX9505 General Description MAX9505 DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch ABSOLUTE MAXIMUM RATINGS VDD to SGND............................................................-0.3V to +4V VIDIN to SGND .........................................................-0.3V to +4V BIAS to SGND ............................................-0.3V to (VDD + 0.3V) MODE0, MODE1 to SGND .......................................-0.3V to +4V (The greater of VSS and -2V) SIN, SOUT, VIDOUT to SGND to (VDD + 0.3V) CPVDD to CPGND ....................................................-0.3V to +4V C1P, C1N, CPVSS .............................Capacitor Connection Only CPGND, SGND, GND............................................-0.1V to +0.1V CPVSS to VSS ..................................................................-0.1V to +0.1V VIDOUT Short Circuit to VDD, SGND and the Greater of (VSS and -2V) ...........................Continuous Continuous Current VIDIN, BIAS, MODE0, MODE1, SIN, SOUT ...................±20mA Continuous Power Dissipation (TA = +70°C) 16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW 16-Pin TQFN (derate 15.6mW/°C above +70°C) .......1349mW Operating Temperature Range ...........................-40°C to +85°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 = CPVDD = MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA = TMIN to TMAX. RL = 150Ω to SGND, unless otherwise noted. VVIDIN = 286mV, gain = 6dB. Typical values are at VDD = CPVDD = MODE1 = 3.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER Supply Voltage Range SYMBOL VDD, CPVDD Quiescent Supply Current IDD Shutdown Supply Current ISHDN Bias Voltage VBIAS CONDITIONS Guaranteed by DC voltage gain and quiescent supply current MIN TYP MAX UNITS 3.6 V 12 15 mA 0.01 1 µA 2.7 VDD = 3.6V (IDD = IVDD + ICPVDD, RL = ∞) VDD = 3.6V (ISHDN = IVDD + ICPVDD), SHDN = SGND 1 V VIDEO AMPLIFIER Input Voltage Range VRANGE Input Current IIN Input Resistance RIN DC Voltage Gain (Note 2) AV Output Black Level (Note 3) Output Short-Circuit Current Output Resistance Shutdown Output Impedance VIDOUT Leakage Current 2 ISC Guaranteed by DC voltage gain, VDD = 2.7V -0.10 +1.05 Guaranteed by DC voltage gain, VDD = 3V -0.10 +1.28 VDD = 2.7V -2.5 +2.5 VDD = 2.7V to 3.6V 5.5 6 6.5 dB VDD = 2.7V -0.1 0 +0.1 V 1 Sinking or sourcing ROUT MODE1 = MODE0 = SGND 50 V µA MΩ mA 0.01 Ω 4 kΩ MODE1 = MODE0 = VDD 0.01 MODE1 = SGND and MODE0 = VDD 0.01 _______________________________________________________________________________________ µA DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch (VDD = CPVDD = MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA = TMIN to TMAX. RL = 150Ω to SGND, unless otherwise noted. VVIDIN = 286mV, gain = 6dB. Typical values are at VDD = CPVDD = MODE1 = 3.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ANALOG SWITCH MODE0 = VDD, ISIN = 10mA MODE1 = VDD 1.7 4.4 MODE1 = SGND 1.2 2.5 On-Resistance Flatness (Note 4) MODE0 = VDD, ISIN = 10mA, VDD = 3V MODE1 = VDD 0.5 0.9 MODE1 = SGND 0.3 0.5 SOUT Off-Leakage Current (Note 5) MODE0 = SGND, VDD = 3.6V, VSIN = 0.3V, 3.3V, VSOUT = 3.3V, 0.3V -1 +1 nA SIN On-Leakage Current (Note 5) MODE0 = VDD, VDD = 3.6V, VSIN = 0.3V, 3.3V, VSOUT = 3.3V, 0.3V -1 +1 nA Turn-On Time VSIN = 1.5V, RL = 300Ω, CL = 35pF, Figure 1; VIH = 1.5V, VIL = 0V 35 60 ns Turn-Off Time VSIN = 1.5V; RL = 300Ω, CL = 35pF, Figure 1; VIH = 1.5V, VIL = 0V 50 80 ns Charge Injection VGEN = 1.5V, RGEN = 0Ω, CL = 1nF, Figure 2 20 MODE0 = SGND, f = 10MHz; VSOUT = 1VP-P, RL = 50Ω, CL = 5pF 30 MODE0 = SGND, f = 1MHz; VSOUT = 1VP-P, RL = 50Ω, CL = 5pF 50 MODE0 = VDD, signal = 0dBm, RL = 50Ω, CL = 5pF 200 Total Harmonic Distortion MODE0 = VDD, VSIN = 2VP-P, RL = 600Ω 0.025 % SOUT Off-Capacitance MODE0 = SGND, f = 1MHz 18 pF Switch On-Capacitance MODE0 = VDD, f = 1MHz 60 pF VIDIN to SIN MODE1 = MODE0 = VDD, f = 20kHz, 1VP-P at VIDIN 100 dB VIDOUT to SIN MODE1 = VDD, MODE0 = SGND, f = 20kHz, 2VP-P at VIDOUT 85 dB On-Resistance RON Off-Isolation On-Channel -3dB Bandwidth Ω Ω pC dB MHz CROSSTALK (VIDEO TO AUDIO) CHARGE PUMP Switching Frequency 150 250 300 kHz 0.5 V 1 µA LOGIC SIGNALS (MODE0, MODE1) Logic-Low Threshold VIL VDD = 2.7V to 3.6V Logic-High Threshold VIH VDD = 2.7V to 3.6V Logic Input Current IIL 1.5 V _______________________________________________________________________________________ 3 MAX9505 ELECTRICAL CHARACTERISTICS (continued) MAX9505 DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch AC ELECTRICAL CHARACTERISTICS (VDD = CPVDD = MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA = TMIN to TMAX. RL = 150Ω to SGND, unless otherwise noted. VVIDIN = 286mV, gain = 6dB. Typical values are at VDD = CPVDD = MODE1 = 3.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS Passband Flatness VDD = 2.7V, f = 100kHz to 5.5MHz Attenuation VDD = 2.7V, VIDOUT= 2VP-P, attenuation is referred to 100kHz Power-Supply Rejection Ratio PSRR Output Impedance ZOUT MIN TYP MAX UNITS -1 0 +1 dB f = 9.1MHz 3 dB f = 27MHz f = 100kHz 35 50 62 dB f = 5MHz 0.5 Ω Differential Gain Error DG NTSC, VIDOUT = 2VP-P 0.1 % Differential Phase Error DP NTSC, VIDOUT = 2VP-P 0.2 degrees 2T Pulse-to-Bar K Rating 2T = 250ns, bar time is 18µs, the beginning 2.5% and the ending 2.5% of the bar time are ignored -0.3 K% 2T Pulse Response 2T = 250ns 0.3 K% 2T Bar Response 2T = 250ns, bar time is 18µs, the beginning 2.5% and the ending 2.5% of the bar time are ignored 0.7 K% Nonlinearity 5-step staircase 0.2 % Group Delay Distortion DDt 100kHz to 5.5MHz 10 ns VIDOUT Capacitive-Load Stability CL VOUT = 2VP-P, no sustained oscillations 20 pF Peak Signal-to-RMS Noise SNR 100kHz to 5.5MHz 64 dB Enable Time tON VIDIN = 0.5V, VIDOUT settled to within 1% of the final voltage 0.2 ms Disable Time tOFF VIDIN = 0.5V, VIDOUT settled to below 1% of the output voltage 0.1 ms All devices are 100% production tested at TA = +25°C. Specifications over temperature are guaranteed by design. Voltage gain (AV) is a two-point measurement in which the output voltage swing is divided by the input voltage swing. With an output load attached, this offset will directly contribute to quiescent current. Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. Note 5: Guaranteed by design. Note 1: Note 2: Note 3: Note 4: 4 _______________________________________________________________________________________ DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch VDD VIH VDD VNO SOUT MODE0 SIN VIL VOUT RL MODE0 tR < 5ns tF < 5ns 50% tOFF CL VOUT SWITCH OUTPUT 0.9 x VOUT 0.9 x VOUT 0V LOGIC INPUT SGND tON CL INCLUDES FIXTURE AND STRAY CAPACITANCE. VOUT = VNO (RL / (RL + RON)) Figure 1. Analog Switch Turn-On/Off Time VDD VDD RGEN SOUT ∆VOUT SIN VGEN VOUT VOUT CL ON SGND MODE0 IN IN OFF OFF Q = (∆VOUT) (CL) VIL TO VIH Figure 2. Charge Injection _______________________________________________________________________________________ 5 MAX9505 Timing Diagrams Typical Operating Characteristics (VDD = CPVDD = MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA = TMIN to TMAX. RIN = 150Ω to SGND, unless otherwise noted. VVIDIN = 286mV, gain = 6dB. Typical values are at TA = +25°C, unless otherwise noted.) SMALL-SIGNAL GAIN FLATNESS vs. FREQUENCY VVIDOUT = 100mVP-P GAIN = 6dB 7 -10 -20 -30 -40 -50 6 5 -30 -40 -60 VVIDOUT = 2VP-P GAIN = 6dB -70 -80 3 -80 0.1 -20 -50 VVIDOUT = 100mVP-P GAIN = 6dB 1 0.1 100 10 1 0.1 10 1 10 100 FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) LARGE-SIGNAL GAIN FLATNESS vs. FREQUENCY GROUP DELAY POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 125 GROUP DELAY (ns) 7 VVIDOUT = 2VP-P 6 5 20 0 -20 100 PSRR (dB) VVIDOUT = 2VP-P GAIN = 6dB MAX9505 toc05 150 MAX9505 toc04 8 MAX9505 toc06 -70 75 -40 -60 50 -80 4 25 -100 0 3 1 0.1 -120 0.1 10 1 QUIESCENT SUPPLY CURRENT vs. TEMPERATURE (VIDEO MODE) -15 10 35 TEMPERATURE (°C) 60 85 2 1 0 5.8 10 3 OUTPUT VOLTAGE (V) VOLTAGE GAIN (dB) 6.0 5.9 11 4 MAX9505 toc08 6.1 12 10 OUTPUT VOLTAGE vs. INPUT VOLTAGE VOLTAGE GAIN vs. TEMPERATURE 13 1 FREQUENCY (MHz) 6.2 MAX9505 toc07 MODE0 = SGND, MODE1 = VDD -40 0.1 0.01 FREQUENCY (MHz) FREQUENCY (MHz) 14 100 10 MAX9505 toc09 GAIN FLATNESS (dB) 0 -10 4 -60 6 10 GAIN (dB) GAIN FLATNESS (dB) 0 LARGE-SIGNAL GAIN vs. FREQUENCY 20 MAX9505 toc02 10 GAIN (dB) 8 MAX9505 toc01 20 MAX9505 toc03 SMALL-SIGNAL GAIN vs. FREQUENCY SUPPLY CURRENT (mA) MAX9505 DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch -1 -40 -15 10 35 TEMPERATURE (°C) 60 85 -0.2 0.3 0.8 1.3 1.8 INPUT VOLTAGE (V) _______________________________________________________________________________________ 2.3 2.8 DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 2T RESPONSE MAX9505 toc11 MAX9505 toc10 DIFFERENTIAL GAIN (%) DIFFERENTIAL PHASE (deg) DIFFERENTIAL GAIN AND PHASE 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 1 2 3 4 5 VIDIN 200mV/div 6 VIDOUT 400mV/div 1 2 3 4 5 6 100ns/div OUT RESPONSE TO NTC-7 VIDEO TEST SIGNAL 12.5T RESPONSE MAX9505 toc12 MAX9505 toc13 VIDIN 250mV/div VIDIN 500mV/div 0V VIDOUT 500mV/div VIDOUT 1V/div 0V 400ns/div 10µs/div ON-RESISTANCE vs. VSOUT FIELD SQUARE-WAVE RESPONSE MAX9505 toc14 MAX9505 toc15 5 MODE0 = MODE1 = VDD 0V VIDOUT 1V/div 0V 4 ON-RESISTANCE (Ω) VIDIN 500mV/div VDD = 2.7V 3 2 VDD = 3.0V VDD = 3.6V 1 0 2ms/div 0 0.6 1.2 1.8 2.4 3.0 3.6 VSOUT (V) _______________________________________________________________________________________ 7 MAX9505 Typical Operating Characteristics (continued) (VDD = CPVDD = MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA = TMIN to TMAX. RIN = 150Ω to SGND, unless otherwise noted. VVIDIN = 286mV, gain = 6dB. Typical values are at TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VDD = CPVDD = MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA = TMIN to TMAX. RIN = 150Ω to SGND, unless otherwise noted. VVIDIN = 286mV, gain = 6dB. Typical values are at TA = +25°C, unless otherwise noted.) SWITCH LEAKAGE CURRENT ON-RESISTANCE vs. VSOUT vs. TEMPERATURE 800 LEAKAGE CURRENT (pA) TA = +85°C 3 2 TA = +25°C 600 400 TA = -40°C SIN ON-LEAKAGE 200 0 0 30 0.5 1.0 1.5 2.0 2.5 3.0 -40 -15 10 35 60 85 VSOUT (V) TEMPERATURE (°C) CHARGE INJECTION vs. VSOUT SUPPLY CURRENT vs. TEMPERATURE (NORMAL SWITCH MODE) 150 MAX9505 toc18 0 CL = 1nF 25 20 VDD = 3V MODE0 = MODE1 = VDD 120 SUPPLY CURRENT (nA) CHARGE INJECTION (pC) SOUT OFF-LEAKAGE 15 10 5 0 MAX9505 toc19 ON-RESISTANCE (Ω) 4 MAX9505 toc17 MODE0 = MODE1 = VDD 1 1000 MAX9505 toc16 5 90 60 30 -5 -10 0.5 1.0 1.5 2.0 2.5 0 3.0 -40 -15 10 35 60 TEMPERATURE (°C) ON-RESPONSE, OFF-ISOLATION, CROSSTALK vs. FREQUENCY TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 20 ON-RESPONSE 0 10 VSIN = 2VP-P RL = 600Ω 1 OFF-ISOLATION THD+N (%) -20 85 MAX9505 toc21 VSOUT (V) MAX9505 toc20 0 LOSS (dB) MAX9505 DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch -40 -60 0.1 VIDOUT CROSSTALK -80 0.01 -100 VIDIN CROSSTALK -120 0.001 0.01 0.1 1 FREQUENCY (MHz) 8 10 0.01 0.1 1 10 FREQUENCY (kHz) _______________________________________________________________________________________ 100 DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch PIN NAME FUNCTION QSOP TQFN 1 15 VSS 2 16 CPVSS 3 1 C1N 4 2 CPGND 5 3 C1P 6 4 CPVDD 7 5 BIAS 8 6 SGND Signal Ground. Connect to GND. Video Input Negative Power Supply. Connect to CPVSS. Charge-Pump Negative Power Supply. Bypass with a 1µF capacitor to CPGND. Charge-Pump Flying Capacitor Negative Terminal. Connect a 1µF capacitor from C1P to C1N. Charge-Pump Power Ground Charge-Pump Flying Capacitor Positive Terminal. Connect a 1µF capacitor from C1P to C1N. Charge-Pump Positive Power Supply. Bypass with a 1µF capacitor to CPGND. Common-Mode Voltage. Connect a 100kΩ resistor from BIAS to SGND. 9 7 VIDIN 10 8 MODE0 Mode Logic Input 0. See Table 1. 11 9 MODE1 Mode Logic Input 1. See Table 1. 12 10 GND Ground. Connect to SGND. 13 11 VDD Positive Power Supply. Bypass with a 1µF capacitor to SGND. 14 12 SOUT Analog Switch Output 15 13 VIDOUT 16 14 SIN Analog Switch Input — EP EP Exposed Paddle. Connect to GND. Video Output Detailed Description The MAX9505 completely eliminates the need for capacitors in the video output by using Maxim’s DirectDrive technology that includes an inverting charge pump and linear regulator. The charge pump and linear regulator create a clean negative supply allowing the amplifier output to swing below ground. The amplifier output can swing both positive and negative so that the video signal black level can be placed at ground. The MAX9505 features a six-pole, Butterworth filter to perform reconstruction filtering on the video input signal from the DAC. DirectDrive Background Integrated video filter/amplifier circuits operating from a single, positive supply usually create video output signals that are level-shifted above ground to keep the signal within the linear range of the output amplifier. For applications in which the positive DC level shift of the video signal is not acceptable, a series capacitor can be inserted in the output connection in an attempt 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 can be between 24Hz and 30Hz, the pole of the highpass filter should ideally be 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. The series capacitor in the usual output connection also prevents damage to the output amplifier if the connector is shorted to a supply or to ground. While the output connection of the MAX9505 does not have a series capacitor, the MAX9505 will not be damaged if the connector is shorted to a supply or to ground (see the Short-Circuit Protection section). _______________________________________________________________________________________ 9 MAX9505 Pin Description MAX9505 DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch INPUT 500mV/div 0V 0V OUTPUT 500mV/div 0V 2ms/div Figure 3. AC-Coupled Output Video Amplifier Typically, the black level of the video signal created by the video DAC is around 300mV. The MAX9505 shifts the black level to ground at the output. Therefore, the active video is above ground, and sync is below ground. The amplifier needs a negative supply for its output stage to remain in its linear region when driving sync below ground. The MAX9505 has 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, which outputs -2V. The linear regulator filters 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 an AC-coupled output. The video signal average can change greatly depending upon the picture content. With an AC-coupled output, the average will change according to the time constant formed by the series capacitor and series resistance (usually 150Ω). For example, Figure 3 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. With the DirectDrive amplifier, the black level is held at ground. The video signal is constrained between -0.3V to +0.7V. Figure 4 shows the video signal from a DirectDrive amplifier with the same input signal as the AC-coupled system. 10 INPUT 500mV/div 0V OUTPUT 500mV/div 2ms/div Figure 4. DirectDrive Output Analog Switch The MAX9505 features an internal 4.4Ω (max) analog normally open switch that interfaces with a 4-pole multimedia jack in which one of the poles can be set to a video input, a video output, or a microphone input. The switch has three modes of operation: open, normal switch, and extended range switch. In normal switch mode, the analog range is from 0V to VDD. In extendedrange switch mode, the analog range is from -2V to VDD. Logic inputs MODE1 and MODE0 control the analog switch operating modes (Table 1). Video Reconstruction Filter Before the video signal from the DAC can be amplified, it must be lowpass filtered to smooth the steps and to reduce 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. The MAX9505 contains a six-pole Butterworth lowpass filter. The passband extends to 5.5MHz, and the minimum attenuation is 35dB at 27MHz. Operating Modes The MAX9505 uses two logic inputs to set the device into one of the following modes: 1) shutdown mode, 2) extended-range switch mode, 3) video output mode, and 4) normal switch mode. In video output mode, the video circuitry is on, the charge pump is on, and the analog switch is open. In normal switch mode, the analog switch is closed, and the video circuitry and charge pump are off. In the extended-range switch mode, the charge pump is on and the analog switch is closed. Shutdown mode reduces the supply current to 10nA typically (see Table 1 and Typical Application Circuits). ______________________________________________________________________________________ DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch MAX9505 Table 1. Operating Modes MODE1 MODE0 VIDEO CIRCUIT CHARGE PUMP ANALOG SWITCH Shutdown Mode 0 0 Off Off Open Video output is 4kΩ and analog switch is open Extended Range Switch Mode 0 1 Off On Closed Video output is high impedance. Analog switch range is from -2V to VDD. Video Output Mode 1 0 On On Open Video output is in normal operation. Analog switch is open. Normal Switch Mode 1 1 Off Off Closed Video output is high impedance. Analog switch range is from SGND to VDD. OPERATING MODE Short-Circuit Protection The MAX9505 typical operating circuit includes a 75Ω back-termination resistor that limits short-circuit current if an external short is applied to the video output. The MAX9505 features internal output, short-circuit protection to prevent device damage in prototyping and applications where the amplifier output can be directly shorted. Shutdown The MAX9505 features a low-power shutdown mode for battery-powered/portable applications. Shutdown reduces the quiescent current to less than 10nA. Setting MODE1 and MODE0 low disables the outputs and places the MAX9505 into a low-power shutdown mode. In shutdown mode the amplifier, charge pump, and linear regulator are turned off and the video output resistance is 4kΩ. COMMENTS Applications Information Power-Supply Bypassing and Ground Management The MAX9505 operates from a 2.7V to 3.6V single supply and requires proper layout and bypassing. For the best performance, place the components as close to the device as possible. Proper grounding improves performance and prevents any switching noise from coupling into the video signal. Connect GND and SGND together at a single point on the PC board. Route all traces that carry switching transients away from SGND. Return SGND to the lowest impedance ground available. Route CPGND and all traces carrying switching transients away from SGND, GND, and other traces and components in the video signal path. Bypass the analog supply (VDD) with a 1µF capacitor to SGND, placed as close to the device as possible. Bypass the charge-pump supply (CPVDD) with a 1µF capacitor to CPGND, placed as close to the device as possible. Connect CPVSS to VSS and bypass with a 1µF capacitor to CPGND as close to the device as possible. ______________________________________________________________________________________ 11 DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch VIDOUT VDD GND MODE1 TOP VIEW SOUT MAX9505 Pin Configurations 12 11 10 9 13 VSS 1 8 16 SIN CPVSS 2 MODE0 15 VIDOUT C1N 3 SIN 14 7 VIDIN 6 SGND MAX9505 CPGND 4 13 VDD C1P 5 12 GND MAX9505 16 5 2 3 CPVDD 6 11 MODE1 BIAS 7 10 MODE0 BIAS SGND 8 4 9 VIDIN QSOP CPVDD C1N 1 C1P CPVSS 15 CPGND VSS 14 SOUT 3mm x 3mm TQFN Functional Diagram/Typical Operating Circuits BIAS 1V 100kΩ MAX9505 VDD MODE1 LOGIC CONTROL MODE0 VIDEO ASIC 6dB BUFFER VIDIN DAC SGND 150Ω C4 1µF VIDEO AMP RECONSTRUCTION FILTER GND DC LEVEL SHIFT VDD VIDOUT 75Ω 1 2 3 AUDIO OUT RIGHT 4 GROUND LINEAR REGULATOR CPVDD CHARGE PUMP C3 1µF CPGND C1P C1N CPVSS VSS C1 1µF C2 1µF VIDEO OUTPUT MODE 12 VIDEO OUT AUDIO OUT LEFT ______________________________________________________________________________________ 4-POLE MULTIMEDIA JACK DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch 2.8V FROM LDO BASEBAND IC 2kΩ 1µF SIN SOUT MIC AMP 2kΩ BIAS 1V 100kΩ VIDOUT MAX9505 1 2 VDD MODE1 MODE0 75Ω LOGIC CONTROL MIC INPUT AUDIO OUT LEFT 3 AUDIO OUT RIGHT 4 GROUND 4-POLE MULTIMEDIA JACK SGND C4 1µF GND VDD CPVDD C3 1µF CPGND C1P C1N CPVSS VSS C1 1µF NORMAL SWITCH MODE POLE 1 USED AS A MICROPHONE INPUT C2 1µF ______________________________________________________________________________________ 13 MAX9505 Functional Diagram/Typical Operating Circuits (continued) DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch MAX9505 Functional Diagram/Typical Operating Circuits (continued) VIDEO DECODER SIN SOUT 75Ω BIAS 1V 100kΩ VIDOUT MAX9505 1 VIDEO INPUT 2 VDD MODE1 MODE0 75Ω LOGIC CONTROL AUDIO OUT LEFT 3 AUDIO OUT RIGHT 4 GROUND 4-POLE MULTIMEDIA JACK SGND C4 1µF LINEAR REGULATOR GND VDD CPVDD CHARGE PUMP C3 1µF CPGND C1P C1N CPVSS VSS C1 1µF NORMAL SWITCH MODE POLE 1 USED AS A VIDEO INPUT C2 1µF Chip Information PROCESS: BICMOS 14 ______________________________________________________________________________________ DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch QSOP.EPS PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH 21-0055 E 1 1 ______________________________________________________________________________________ 15 MAX9505 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 12x16L QFN THIN.EPS MAX9505 DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch D2 0.10 M C A B b D D2/2 D/2 E/2 E2/2 CL (NE - 1) X e E E2 L k e CL (ND - 1) X e CL CL 0.10 C 0.08 C A A2 L A1 L e e PACKAGE OUTLINE 12, 16L, THIN QFN, 3x3x0.8mm E 21-0136 PKG 12L 3x3 REF. MIN. A 0.70 b 0.20 D 2.90 E e 2.90 L 0.45 NOM. 0.75 0.80 0.70 0.75 0.80 0.25 0.30 0.20 0.25 0.30 3.00 3.10 2.90 3.00 3.10 T1233-1 3.00 3.10 2.90 3.00 3.10 0.50 BSC. NOM. 0.65 0.30 0.40 16 ND 3 4 NE 3 4 k MAX. 0.50 BSC. 12 0.50 0 0.02 0.05 0 0.02 0.05 0.25 0.20 REF - - 0.25 0.20 REF - - A2 EXPOSED PAD VARIATIONS MIN. N A1 2 16L 3x3 MAX. 0.55 1 PKG. CODES E2 D2 PIN ID JEDEC DOWN BONDS ALLOWED MIN. NOM. MAX. MIN. NOM. MAX. 0.95 1.10 1.25 0.95 1.10 1.25 0.35 x 45∞ WEED-1 NO T1233-3 0.95 1.10 1.25 0.95 1.10 1.25 0.35 x 45∞ WEED-1 YES T1633-1 0.95 1.10 1.25 0.95 1.10 1.25 0.35 x 45∞ WEED-2 NO T1633-2 0.95 1.10 1.25 0.95 1.10 1.25 0.35 x 45∞ WEED-2 YES T1633F-3 0.65 0.80 0.95 0.65 0.80 0.95 0.225 x 45∞ WEED-2 N/A T1633-4 0.95 1.10 1.25 0.95 1.10 1.25 0.35 x 45∞ NO WEED-2 NOTES: 1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994. 2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES. 3. N IS THE TOTAL NUMBER OF TERMINALS. 4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE. 5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm FROM TERMINAL TIP. 6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY. 7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION. 8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS. 9. DRAWING CONFORMS TO JEDEC MO220 REVISION C. PACKAGE OUTLINE 12, 16L, THIN QFN, 3x3x0.8mm 21-0136 E 2 2 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. Inc.