MAX9507 Datasheet, PDF (1/29 Pages) Maxim Integrated Products – 1.8V DirectDrive Video Filter Amplifier with Load Detection and Dual SPST Analog Switches

19-1028; Rev 0; 11/07
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1.8V DirectDrive Video Filter Amplifier with
Load Detection and Dual SPST Analog Switches
General Description
The MAX9507 amplifies and filters standard-definition
video signals and only consumes 5.8mW quiescent
power and 11.7mW average power. The MAX9507
leverages Maxim’s DirectDrive™ technology to gener-
ate a clean, internal negative supply. Combining the
internal negative power supply with the external posi-
tive 1.8V supply, the MAX9507 is able to drive a 2V_P-P
video signal into a 150Ω load.
The MAX9507 provides an I²C interface for easy configu-
ration and access to the load status. The MAX9507 can
detect, report, and act upon the change of a video load.
This feature helps reduce overall power consumption by
allowing the system to turn on the video encoder and dri-
ver only when a video load is connected to the MAX9507.
With a high power-supply rejection ratio (47dB at
100kHz), the MAX9507 can be powered directly from a
1.8V digital supply. The two integrated single-pole/sin-
gle-throw (SPST) analog switches are ideal for routing
audio, video, or digital signals.
The input of the MAX9507 can be directly connected to
the output of a video DAC. The MAX9507 also features
a transparent input sync-tip clamp, allowing AC-cou-
pling of input signals with different DC biases.
The MAX9507 has an internal fixed gain of 8. The input
full-scale video signal is nominally 0.25V_P-P, and the
output full-scale video signal is nominally 2V_P-P.
Features
o 1.8V or 2.5V Single-Supply Operation
o Low Power Consumption (5.8mW Quiescent,
11.7mW Average)
o Video Load Detection
o DirectDrive Sets Video Output Black Level Near
Ground
o Dual SPST Analog Switches
o Transparent Input Sync-Tip Clamp
o I²C Control
Applications
Mobile Phones
Portable Media Players (PMP)
Ordering Information
PART
PIN-PACKAGE
PKG CODE
TOP
MARK
MAX9507ATE+ 16 TQFN-EP*
T1633+4
AFH
Note: This device is specified over the -40°C to +125°C operat-
ing temperature range.
+Denotes lead-free package.
*EP = Exposed pad.
Pin Configuration appears at end of data sheet.
Block Diagram
250mVP-P VIDEO
MAX9507
IN
LPF
TRANSPARENT
CLAMP
LCF
I²C
NO1
NO2
LOAD DETECT
AV =
8V/V
LINEAR
REGULATOR
CHARGE
PUMP
OUT
2VP-P VIDEO
0V
COM1
COM2
________________________________________________________________ Maxim Integrated Products 1
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or visit Maxim’s website at www.maxim-ic.com.