MAX9657 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Quad Video (Filter) Amplifiers with Input Sync-Tip Clamps

19-4453; Rev 0; 2/09
Quad Video (Filter) Amplifiers with Input
Sync-Tip Clamps
General Description
The MAX9657 is a small, low-power, quad video ampli-
fier with input sync-tip clamps. It features a bandwidth
of 15MHz, making it suitable for not only standard-defi-
nition video signals, but also video graphics array
(VGA) signals with a 640 x 480 resolution at up to 85Hz
refresh rate.
The MAX9658 is a quad video amplifier with integrated
lowpass filters and input sync-tip clamps. The lowpass
filters typically have ±1dB passband flatness out to
9.5MHz and 47dB attenuation at 27MHz. Specially suit-
ed for composite video signals, the MAX9658 is ideal
for performing anti-alias filtering at the inputs of a digital
video recorder or for performing reconstruction filtering
at the outputs of a SCART set-top box.
Both devices require that the incoming video signals be
AC-coupled to the inputs. The input sync-tip clamps set
the internal DC level of the video signals.
The amplifiers have 2V/V gain, and the outputs can be
DC-coupled to a 75Ω load, which is the equivalent of
two video loads, or AC-coupled to a 150Ω load.
Both the MAX9657/MAX9658 feature a low-power shut-
down mode, in which supply current is reduced to
35µA.
The MAX9657/MAX9658 operate from a single 2.7V to
3.6V supply, are specified over the -40°C to +125°C
automotive temperature range, and are offered in a
small, 16-pin QSOP package.
Applications
Set-Top Boxes
Digital Video Recorders
Typical Application Circuits and Pin Configuration appear
at end of data sheet.
Features
♦ Quad Channel
♦ 9.5MHz, ±1dB Passband (MAX9658)
♦ 47dB Attenuation at 27MHz (MAX9658)
♦ Fixed Gain of 2V/V
♦ Low Power: 21mA
♦ 2.7V to 3.6V Single-Supply Operation
Ordering Information
PART
PIN-PACKAGE
STANDARD-DEFINITION
VIDEO FILTER
MAX9657AEE+ 16 QSOP
No
MAX9658AEE+ 16 QSOP
Yes
Note: All devices are specified over the -40°C to +125°C oper-
ating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Functional Diagram
UNKNOWN
BIAS
SHDN
IN0
MAX9657/MAX9658
LPF*
300mV
OUT0
CLAMPREF
AV = 2V/V
IN1
LPF*
CLAMPREF
OUT1
AV = 2V/V
IN2
LPF*
CLAMPREF
OUT2
AV = 2V/V
IN3
LPF*
CLAMPREF
OUT3
AV = 2V/V
GND
*LOWPASS FILTER IN MAX9658 ONLY.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.