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MAX9505ETE
DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch
General DescriptionThe MAX9505 filters and amplifies standard-definition
video signals. Maxim’s DirectDrive™ technology elimi-
nates 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 con-
nected 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 pass-
band 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 visi-
bly flawless.
The MAX9505 features an internal 1.7Ωanalog 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.
ApplicationsMobile Phones/Smartphones
Space-Constrained, Low-Power Audio/Video
Portable Devices
FeaturesDC-Coupled OutputDirect Connection to Video DACVideo Output Black Level Set to GroundVideo Reconstruction Filter with 50dB
Attenuation at 27MHz6dB Gain1.7ΩRONAnalog Switch10nA Shutdown Supply Current2.7V to 3.6V Single-Supply Operation
MAX9505
DirectDrive Video Amplifier with
Reconstruction Filter and Analog Switch
Ordering Information
Block Diagram19-3675; Rev 0; 5/05
Functional Diagram/Typical Operating Circuit and Pin
Configurations appear at end of data sheet.*All devices are specified over the -40°C to +85°C operating
temperature range.
MAX9505
DirectDrive Video Amplifier with
Reconstruction Filter and Analog Switch
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= CPVDD= MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA= TMINto
TMAX. RL= 150Ωto SGND, unless otherwise noted. VVIDIN= 286mV, gain = 6dB. Typical values are at VDD= CPVDD = MODE1 = 3.0V,= +25°C, unless otherwise noted.) (Note 1)
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.
VDDto 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
SIN, SOUT, VIDOUT to SGND(The greater of VSSand -2V)
to (VDD+ 0.3V)
CPVDDto CPGND....................................................-0.3V to +4V
C1P, C1N, CPVSS.............................Capacitor Connection Only
CPGND, SGND, GND............................................-0.1V to +0.1V
CPVSSto VSS..................................................................-0.1V to +0.1V
VIDOUT Short Circuit to VDD, SGND
and the Greater of (VSSand -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
MAX9505
DirectDrive Video Amplifier with
Reconstruction Filter and Analog Switch
ELECTRICAL CHARACTERISTICS (continued)(VDD= CPVDD= MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA= TMINto
TMAX. RL= 150Ωto SGND, unless otherwise noted. VVIDIN= 286mV, gain = 6dB. Typical values are at VDD= CPVDD = MODE1 = 3.0V,= +25°C, unless otherwise noted.) (Note 1)
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= TMINto
TMAX. RL = 150Ωto SGND, unless otherwise noted. VVIDIN= 286mV, gain = 6dB. Typical values are at VDD= CPVDD = MODE1 = 3.0V, = +25°C, unless otherwise noted.) (Note 1)
Note 1:All devices are 100% production tested at TA= +25°C. 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.
Note 4: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.
MAX9505
DirectDrive Video Amplifier with
Reconstruction Filter and Analog Switch
Timing DiagramsFigure 1. Analog Switch Turn-On/Off Time
Figure 2. Charge Injection
Typical Operating Characteristics(VDD= CPVDD = MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA=
TMINto TMAX. RIN = 150Ωto SGND, unless otherwise noted. VVIDIN= 286mV, gain = 6dB. Typical values are at TA= +25°C, unless
MAX9505
DirectDrive Video Amplifier with
Reconstruction Filter and Analog Switch
MAX9505
DirectDrive Video Amplifier with
Reconstruction Filter and Analog Switchypical Operating Characteristics (continued)(VDD= CPVDD = MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA=
TMINto TMAX. RIN = 150Ωto SGND, unless otherwise noted. VVIDIN= 286mV, gain = 6dB. Typical values are at TA= +25°C, unless
otherwise noted.)
MAX9505
DirectDrive Video Amplifier with
Reconstruction Filter and Analog Switchypical Operating Characteristics (continued)(VDD= CPVDD = MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1µF, RBIAS = 100kΩ, TA=
TMINto TMAX. RIN = 150Ωto SGND, unless otherwise noted. VVIDIN= 286mV, gain = 6dB. Typical values are at TA= +25°C, unless
otherwise noted.)
CHARGE INJECTION vs. VSOUTMAX9505 toc18
VSOUT (V)
CHARGE INJECTION (pC)
-103.0
