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19-3676; Rev 0; 5/05
DirectDrive Video Amplifier with Reconstruction Filter
General Description
The MAX9503 filters and amplifies standard-definition video signals. Maxim's DirectDriveTM technology eliminates large output-coupling capacitors and sets the video black level to ground. The input of the MAX9503 can be directly connected to the output of a video digital-to-analog converter (DAC). The MAX9503 provides a compact, integrated, and low-power solution. An internal reconstruction filter smoothes the steps and reduces the spikes on the video signal from the DAC. 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 clean 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 MAX9503 is available with +6dB (MAX9503G) and +12dB (MAX9503M) gains. The device operates from a 2.7V to 3.6V single supply and features a 10nA lowpower shutdown mode. The MAX9503 is offered in space-saving 16-pin QSOP and 16-pin TQFN packages and is specified over the -40C to +85C extended temperature range. DC-Coupled Output Direct Connection to Video DAC Video Output Black Level Set to Ground Video Reconstruction Filter with 50dB Attenuation at 27MHz Preset Gain 6dB (MAX9503G) 12dB (MAX9503M) 10nA Shutdown Supply Current 2.7V to 3.6V Single-Supply Operation
Features
MAX9503
Ordering Information
PART* MAX9503GEEE MAX9503GETE MAX9503MEEE PINPACKAGE 16 QSOP 16 TQFN 16 QSOP PKG CODE E16-4 T1633-4 E16-4 TOP MARK -- ACU --
Applications
Digital Still Cameras Mobile Phones/Smartphones Security Cameras Portable Media Players Space-Constrained, Low-Power Portable Devices
MAX9503METE 16 TQFN T1633-4 ACV *All devices are specified over the -40C to +85C operating temperature range.
Functional Diagram/Typical Operating Circuit and Pin Configurations appear at end of data sheet.
Block Diagram
-0.1V TO +0.1V 0V LOWPASS FILTER AMP LINEAR REGULATOR CHARGE PUMP VIDOUT
0 TO 50mV 0V VIDIN BUFFER
MAX9503
MAX9503G: 6dB MAX9503M: 12dB
________________________________________________________________ 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.
DirectDrive Video Amplifier with Reconstruction Filter MAX9503
ABSOLUTE MAXIMUM RATINGS
VDD to SGND............................................................-0.3V to +4V VIDIN to SGND .........................................................-0.3V to +4V BIAS to SGND ..............................................-0.3V to (VDD + .3V) SHDN to SGND ........................................................-0.3V to +4V VIDOUT to SGND........................(The greater of VSS and -2V) 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, SHDN ......................................................20mA Continuous Power Dissipation (TA = +70C) 16-Pin QSOP (derate 8.3mW/C above +70C)...........667mW 16-Pin TQFN (derate 15.6mW/C above +70C) .......1349mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
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 = SHDN = 3.0V, SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1F, RBIAS = 100k, TA = TMIN to TMAX. RL = 150 to SGND, unless otherwise noted. VVIDIN = 286mV (MAX9503G), VVIDIN = 143mV (MAX9503M). Typical values are at VDD = CPVDD = SHDN = 3.0V, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Supply Voltage Range Quiescent Supply Current Shutdown Supply Current Bias Voltage VIDEO AMPLIFIER Guaranteed by DC voltage gain, VDD = 2.7V Guaranteed by DC voltage gain, VDD = 3V VDD = 2.7V MAX9503G DC Voltage Gain (Note 2) AV VDD = 2.7V to 3.6V MAX9503M MAX9503G MAX9503M MAX9503G MAX9503M MAX9503G MAX9503M -0.10 -0.050 -0.10 -0.05 -2.5 1 5.5 11.5 -0.1 -0.15 6 12 0 0 50 0.01 0.02 MAX9503G MAX9503M 4.2 8.2 6.5 12.5 +0.1 +0.15 dB +1.05 +0.525 +1.28 +0.64 +2.5 A M V SYMBOL VDD, CPVDD IDD ISHDN VBIAS CONDITIONS Guaranteed by DC voltage gain and quiescent current VDD = 3.6V (IDD = IVDD + ICPVDD, RL = ) VDD = 3.6V (ISHDN = IVDD + ICPVDD), SHDN = SGND MIN 2.7 12 0.01 1 TYP MAX 3.6 15 1 UNITS V mA A V
Input Voltage Range
VRANGE
Input Current Input Resistance
IIN RIN
Output Black Level (Note 3) Output Short-Circuit Current Output Resistance Shutdown Output Impedance ISC ROUT
VDD = 2.7V Sinking or sourcing MAX9503G MAX9503M
V mA k
ROUTSHDN SHDN = SGND
2
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DirectDrive Video Amplifier with Reconstruction Filter
ELECTRICAL CHARACTERISTICS (continued)
(VDD = CPVDD = SHDN = 3.0V, SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1F, RBIAS = 100k, TA = TMIN to TMAX. RL = 150 to SGND, unless otherwise noted. VVIDIN = 286mV (MAX9503G), VVIDIN = 143mV (MAX9503M). Typical values are at VDD = CPVDD = SHDN = 3.0V, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER CHARGE PUMP Switching Frequency LOGIC SIGNALS Logic-Low Threshold Logic-High Threshold Logic Input Current VIL VIH IIL VDD = 2.7V to 3.6V VDD = 2.7V to 3.6V 1.5 1 0.5 V V A 150 250 300 kHz SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX9503
AC ELECTRICAL CHARACTERISTICS
(VDD = CPVDD = SHDN = 3.0V, SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1F, RBIAS = 100k, TA = TMIN to TMAX. RL = 150 to SGND, unless otherwise noted. VVIDIN = 286mV (MAX9503G), VVIDIN = 143mV (MAX9503M). Typical values are at VDD = CPVDD = SHDN = 3.0V, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Passband Flatness Attenuation SYMBOL CONDITIONS VDD = 2.7V, f = 100kHz to 5.5MHz VDD = 2.7V, VIDOUT= 2VP-P, attenuation is referred to 100kHz PSRR ZOUT DG DP f = 100kHz f = 5MHz NTSC, VIDOUT = 2VP-P NTSC, VIDOUT = 2VP-P f = 9.1MHz f = 27MHz MAX9503G MAX9503M MAX9503G MAX9503M MAX9503G MAX9503M MAX9503G MAX9503M 35 MIN -1 TYP 0 3 dB 50 62 56 0.5 0.65 0.1 0.1 0.2 0.2 -0.3 0.3 0.7 0.2 10 20 dB % degrees MAX +1 UNITS dB
Power-Supply Rejection Ratio Output Impedance Differential Gain Error Differential Phase Error
2T Pulse-to-Bar K Rating 2T Pulse Response 2T Bar Response Nonlinearity Group-Delay Distortion VIDOUT Capacitive-Load Stability DDt CL
2T = 250ns, bar time is 18s, the beginning 2.5% and the ending 2.5% of the bar time are ignored 2T = 250ns 2T = 250ns, bar time is 18s, the beginning 2.5% and the ending 2.5% of the bar time are ignored 5-step staircase 100kHz to 5.5MHz VOUT = 2VP-P, no sustained oscillations
K% K% K% % ns pF
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DirectDrive Video Amplifier with Reconstruction Filter MAX9503
AC ELECTRICAL CHARACTERISTICS (continued)
(VDD = CPVDD = SHDN = 3.0V, SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1F, RBIAS = 100k, TA = TMIN to TMAX. RL = 150 to SGND, unless otherwise noted. VVIDIN = 286mV (MAX9503G), VVIDIN = 143mV (MAX9503M). Typical values are at VDD = CPVDD = SHDN = 3.0V, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Peak Signal-to-RMS Noise Enable Time Disable Time SYMBOL SNR tON tOFF CONDITIONS 100kHz to 5.5MHz MAX9503G MAX9503M MIN TYP 64 58 0.2 0.1 MAX UNITS dB ms ms
VIDIN = 0.5V, VIDOUT settled to within 1% of the final voltage VIDIN = 0.5V, VIDOUT settled to below 1% of the output voltage
Note 1: All devices are 100% production tested at TA = +25C. Specifications over temperature are guaranteed by design. Note 2: Voltage gain (AV) is a two-point measurement in which the output voltage swing is divided by the input voltage swing. Note 3: With an output load attached, this offset will directly contribute to quiescent current.
Typical Operating Characteristics
(VDD = CPVDD = SHDN = 3.0V, SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1F, RBIAS = 100k, TA = TMIN to TMAX. RIN = 150 to SGND, unless otherwise noted. VVIDIN = 286mV (MAX9503G), VVIDIN = 143mV (MAX9503M). Typical values are at TA = +25C, unless otherwise noted.)
MAX9503G SMALL-SIGNAL GAIN vs. FREQUENCY
MAX9503 toc01
MAX9503M SMALL-SIGNAL GAIN vs. FREQUENCY
MAX9503 toc02
MAX9503G SMALL-SIGNAL GAIN FLATNESS vs. FREQUENCY
VVIDOUT = 100mVP-P GAIN = 6dB 7 GAIN FLATNESS (dB)
MAX9503 toc03
20 10 0 -10 GAIN (dB)
20 10 0 -10 GAIN (dB) -20 -30 -40 -50 -60
8
-20 -30 -40 -50 -60 -70 -80 0.1 1 10 100 FREQUENCY (MHz) VVIDOUT = 100mVP-P GAIN = 6dB
6
5
4 VVIDOUT = 100mVP-P GAIN = 12dB 3 0.1 1 10 100 0.1 1 FREQUENCY (MHz) 10 FREQUENCY (MHz)
-70 -80
4
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DirectDrive Video Amplifier with Reconstruction Filter MAX9503
Typical Operating Characteristics (continued)
(VDD = CPVDD = SHDN = 3.0V, SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1F, RBIAS = 100k, TA = TMIN to TMAX. RIN = 150 to SGND, unless otherwise noted. VVIDIN = 286mV (MAX9503G), VVIDIN = 143mV (MAX9503M). Typical values are at TA = +25C, unless otherwise noted.)
MAX9503M SMALL-SIGNAL GAIN FLATNESS vs. FREQUENCY
VVIDOUT = 100mVP-P GAIN = 12dB
MAX9503 toc04
MAX9503G LARGE-SIGNAL GAIN vs. FREQUENCY
MAX9503 toc05
MAX9503M LARGE-SIGNAL GAIN vs. FREQUENCY
10 0 -10 GAIN (dB) -20 -30 -40 -50 -60
MAX9503 toc06
15 14 GAIN FLATNESS (dB) 13
20 10 0 -10 GAIN (dB) -20 -30 -40 -50 -60 -70 VVIDOUT = 2VP-P GAIN = 6dB 0.1 1 10
20
12 11 10 9 0.1 1 FREQUENCY (MHz) 10
-70 -80 100 0.1
VVIDOUT = 2VP-P GAIN = 12dB 1 10 100
-80 FREQUENCY (MHz)
FREQUENCY (MHz)
MAX9503G LARGE-SIGNAL GAIN FLATNESS vs. FREQUENCY
MAX9503 toc07
MAX9503M LARGE-SIGNAL GAIN FLATNESS vs. FREQUENCY
VVIDOUT = 2VP-P GAIN = 12dB 13 GAIN FLATNESS (dB)
MAX9503 toc08
8 VVIDOUT = 2VP-P GAIN = 6dB 7 GAIN FLATNESS (dB)
14
6
12
5
11
4
10
3 0.1 1 FREQUENCY (MHz) 10
9 0.1 1 FREQUENCY (Hz) 10
MAX9503G GROUP DELAY
MAX9503 toc09
MAX9503M GROUP DELAY
VVIDOUT = 2VP-P 125 GROUP DELAY (ns) 100 75 50 25 0
MAX9503 toc10
150 VVIDOUT = 2VP-P 125 GROUP DELAY (ns) 100 75 50 25 0 0.1 1 10
150
100
0.1
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
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5
DirectDrive Video Amplifier with Reconstruction Filter MAX9503
Typical Operating Characteristics (continued)
(VDD = CPVDD = SHDN = 3.0V, SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1F, RBIAS = 100k, TA = TMIN to TMAX. RIN = 150 to SGND, unless otherwise noted. VVIDIN = 286mV (MAX9503G), VVIDIN = 143mV (MAX9503M). Typical values are at TA = +25C, unless otherwise noted.)
MAX9503G POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
MAX9503 toc11
MAX9503M POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
MAX9503 toc12
QUIESCENT SUPPLY CURRENT vs. TEMPERATURE
MAX9503 toc13
20 0 -20 PSRR (dB) -40 -60 -80 -100 -120 0.01 0.1 1
20 0 -20 PSRR (dB) -40 -60 -80 -100 -120
14
SUPPLY CURRENT (mA)
13
12
MAX9503M
11
MAX9503G
10 0.01 0.1 1 10 -40 -15 10 35 60 85 FREQUENCY (MHz) TEMPERATURE (C)
10
FREQUENCY (MHz)
MAX9503G VOLTAGE GAIN vs. TEMPERATURE
MAX9503 toc14
MAX9503M VOLTAGE GAIN vs. TEMPERATURE
MAX9503 toc15
MAX9503G OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX9503 toc16
6.2
12.3 12.2 VOLTAGE GAIN (dB) 12.1 12.0 11.9 11.8
4
OUTPUT VOLTAGE (V) -40 85
6.1 VOLTAGE GAIN (dB)
3
2
6.0
1
5.9
0
5.8 -40 -15 10 35 60 85 TEMPERATURE (C)
11.7 -15 10 35 60 TEMPERATURE (C)
-1 -0.2 0.3 0.8 1.3 1.8 2.3 2.8 INPUT VOLTAGE (V)
MAX9503M OUTPUT VOLTAGE vs. INPUT VOLTAGE
DIFFERENTIAL GAIN (%)
MAX9503 toc17
MAX9503G DIFFERENTIAL GAIN AND PHASE
0.3 0.2 0.1 0 -0.1 -0.2 -0.3 1 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 1 2 3 4 5 6 2 3 4 5 6 DIFFERENTIAL GAIN (%) 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 1 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 1
MAX9503 toc18
MAX9503M DIFFERENTIAL GAIN AND PHASE
MAX9503 toc19
4 3 OUTPUT VOLTAGE (V) 2 1
2
3
4
5
6
DIFFERENTIAL PHASE (deg)
0 -1 -2 -0.2 0 0.2 0.4 0.6 0.8 1.0 1.2 INPUT VOLTAGE (V)
DIFFERENTIAL PHASE (deg)
2
3
4
5
6
6
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DirectDrive Video Amplifier with Reconstruction Filter MAX9503
Typical Operating Characteristics (continued)
(VDD = CPVDD = SHDN = 3.0V, SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1F, RBIAS = 100k, TA = TMIN to TMAX. RIN = 150 to SGND, unless otherwise noted. VVIDIN = 286mV (MAX9503G), VVIDIN = 143mV (MAX9503M). Typical values are at TA = +25C, unless otherwise noted.)
MAX9503G 2T RESPONSE
MAX9503 toc20
MAX9503M 2T RESPONSE
MAX9503 toc21
MAX9503G 12.5T RESPONSE
MAX9503 toc22
VIDIN 200mV/div
VIDIN 100mV/div
VIDIN 250mV/div
300mV VIDOUT 400mV/div VIDOUT 400mV/div
VIDOUT 500mV/div 0V
100ns/div
100ns/div
400ns/div
MAX9503M 12.5T RESPONSE
MAX9503 toc23
MAX9503G OUT RESPONSE TO NTC-7 VIDEO TEST SIGNAL
MAX9503 toc24
MAX9503M OUT RESPONSE TO NTC-7 VIDEO TEST SIGNAL
MAX9503 toc25
VIDIN 100mV/div
VIDIN 500mV/div 0V
VIDIN 250mV/div 0V
150mV VIDOUT 1V/div 0V VIDOUT 1V/div 0V
VIDOUT 400mV/div 0V 400ns/div 10s/div
10s/div
MAX9503G OUT RESPONSE TO BLACKTO-WHITE VIDEO TEST SIGNAL
MAX9503 toc26
MAX9503M OUT RESPONSE TO BLACKTO-WHITE VIDEO TEST SIGNAL
MAX9503 toc27
VIDIN 500mV/div 0V 0V
VIDIN 250mV/div
0V
VIDOUT 1V/div
0V
VIDOUT 1V/div
2ms/div
2ms/div
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7
DirectDrive Video Amplifier with Reconstruction Filter MAX9503
Pin Description
PIN QSOP 1 2 3 4 5 6 7 8 9 10, 14, 15 11 12 13 16 -- TQFN 15 16 1 2 3 4 5 6 7 8, 12, 14 9 10 11 13 EP NAME VSS CPVSS C1N CPGND C1P CPVDD BIAS SGND VIDIN N.C. SHDN GND VDD VIDOUT EP FUNCTION Negative Power Supply. Connect to CPVSS. Charge-Pump Negative Power Supply. Bypass with a 1F capacitor to CPGND. Charge-Pump Flying Capacitor Negative Terminal. Connect a 1F capacitor from C1P to C1N. Charge-Pump Power Ground Charge-Pump Flying Capacitor Positive Terminal. Connect a 1F capacitor from C1P to C1N. Charge-Pump Positive Power Supply. Bypass with a 1F capacitor to CPGND. Common-Mode Voltage. Connect a 100k resistor from BIAS to SGND. Signal Ground. Connect to GND. Video Input No Connection. Not internally connected. Connect to SGND. Active-Low Shutdown. Connect to VDD for normal operation. Ground. Connect to SGND. Positive Power Supply. Bypass with a 1F capacitor to SGND. Video Output Exposed Paddle. Connect to GND.
Detailed Description
The MAX9503 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 MAX9503 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.
8
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 220F to 3000F. 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 MAX9503 does not have a series capacitor, the MAX9503 will not be damaged if the connector is shorted to a supply or to ground (see the Short-Circuit Protection section). Video Amplifier Typically, the black level of the video signal created by the video DAC is around 300mV. The MAX9503 shifts the black level to ground at the output so that 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.
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DirectDrive Video Amplifier with Reconstruction Filter MAX9503
INPUT 500mV/div 0V
INPUT 500mV/div
OUTPUT 500mV/div
0V
OUTPUT 1V/div
2ms/div
2ms/div
Figure 1. AC-Coupled Output
Figure 2. DirectDrive Output
The MAX9503 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 vs. 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 150). 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. 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
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 MAX9503 contains a six-pole Butterworth lowpass filter. The passband extends to 5.5MHz, and the minimum attenuation is 35dB at 27MHz.
Short-Circuit Protection
The MAX9503 typical application circuit includes a 75 back-termination resistor that limits short-circuit current if an external short is applied to the video output. The MAX9503 features internal output, short-circuit protection to prevent device damage in prototyping and applications where the amplifier output can be directly shorted.
Shutdown
The MAX9503 features a low-power shutdown mode for battery-powered/portable applications. Shutdown reduces the quiescent current to less than 10nA. Connecting SHDN to ground (SGND) disables the outputs and places the MAX9503 into a low-power shutdown mode. In shutdown mode, the amplifier, charge pump, and linear regulator are turned off and the video output impedance is 4k.
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9
DirectDrive Video Amplifier with Reconstruction Filter MAX9503
Applications Information
Power-Supply Bypassing and Ground Management
The MAX9503 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 1F capacitor to SGND, placed as close to the device as possible. Bypass the charge-pump supply (CPV DD) with a 1F capacitor to CPGND, placed as close to the device as possible. Connect CPVSS to VSS and bypass with a 1F capacitor to CPGND as close to the device as possible.
Pin Configurations
GND 10 N.C. VDD
TOP VIEW
12
11
SHDN 9
VSS 1 8 7 N.C. VIDIN SGND BIAS CPVSS 2 C1N 3 MAX9503 CPGND 4 C1P 5 CPVDD 6
16 VIDOUT 15 N.C. 14 N.C. 13 VDD 12 GND 11 SHDN 10 N.C. 9 VIDIN
VIDOUT N.C. VSS CPVSS
13 14
MAX9503
15 16 1 C1N 2 CPGND 3 C1P 4 CPVDD 6 5
BIAS 7 SGND 8
QSOP
3mm x 3mm TQFN
10
______________________________________________________________________________________
DirectDrive Video Amplifier with Reconstruction Filter
Functional Diagram/Typical Operating Circuit
MAX9503
BIAS
1V
100k VDD SHDN
MAX9503G (MAX9503M)
SHUTDOWN CIRCUIT 6dB (12dB) BUFFER VIDIN SGND RECONSTRUCTION FILTER AMP VIDOUT 75 VDD
VIDEO ASIC DAC
1F
GND VDD CPVDD CHARGE PUMP DC LEVEL SHIFT LINEAR REGULATOR
75
C3 1F
CPGND C1P C1 1F
C1N
CPVSS
VSS
C2 1F
Chip Information
PROCESS: BICMOS
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11
DirectDrive Video Amplifier with Reconstruction Filter MAX9503
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 OUTLINE, QSOP .150", .025" LEAD PITCH
21-0055
E
1
1
12
______________________________________________________________________________________
QSOP.EPS
DirectDrive Video Amplifier with Reconstruction Filter
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
MAX9503
D2 b
0.10 M C A B
D D/2
D2/2
E/2
E2/2
C L
E
(NE - 1) X e
E2
L
C L
e
k (ND - 1) X e
C L
0.10 C 0.08 C A A2 A1 L
C L
L
e
e
PACKAGE OUTLINE 12, 16L, THIN QFN, 3x3x0.8mm
21-0136
E
1
2
PKG REF. A b D E e L N ND NE A1 A2 k 0.25 0 MIN. 0.70 0.20 2.90 2.90 0.45
12L 3x3 NOM. 0.75 0.25 3.00 3.00 0.50 BSC. 0.55 12 3 3 0.02 0.20 REF 0.05 0 0.25 0.65 0.30 MAX. 0.80 0.30 3.10 3.10 MIN. 0.70 0.20 2.90 2.90
16L 3x3 NOM. 0.75 0.25 3.00 3.00 0.50 BSC. 0.40 16 4 4 0.02 0.20 REF 0.05 0.50 MAX. 0.80 0.30 3.10 3.10 PKG. CODES T1233-1 T1233-3 T1633-1 T1633-2 T1633F-3 T1633-4
EXPOSED PAD VARIATIONS
D2 MIN. 0.95 0.95 0.95 0.95 0.65 0.95 NOM. 1.10 1.10 1.10 1.10 0.80 1.10 MAX. 1.25 1.25 1.25 1.25 0.95 1.25 MIN. 0.95 0.95 0.95 0.95 0.65 0.95 E2 NOM. MAX. 1.10 1.10 1.10 1.10 0.80 1.10 1.25 1.25 1.25 1.25 0.95 1.25 PIN ID 0.35 x 45 0.35 x 45 0.35 x 45 0.35 x 45 JEDEC WEED-1 WEED-1 WEED-2 WEED-2
DOWN BONDS ALLOWED
NO YES NO YES N/A NO
0.225 x 45 WEED-2 0.35 x 45 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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 (c) 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.

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