MAX9505 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – DirectDrive Video Amplifier with Reconstruction Filter and Analog Switch

19-3675; Rev 0; 5/05
DirectDrive Video Amplifier with
Reconstruction Filter and Analog Switch
General Description
The 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 1.7Ω 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.
Applications
Mobile Phones/Smartphones
Space-Constrained, Low-Power Audio/Video
Portable Devices
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 R_ON Analog Switch
♦ 10nA Shutdown Supply Current
♦ 2.7V to 3.6V Single-Supply Operation
Ordering Information
PART*
PIN-
PACKAGE
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.
Functional Diagram/Typical Operating Circuit and Pin
Configurations appear at end of data sheet.
Block Diagram
0 TO 50mV
0V
S_OUT
VIDIN
MAX9505
BUFFER
LOWPASS
FILTER
6dB
AMP
S_IN
0V
VIDOUT
LINEAR
REGULATOR
CHARGE
PUMP
-0.1V TO
+0.1V
________________________________________________________________ Maxim Integrated Products 1
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