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 75

Ω load, which is the equivalent of

two video loads, or AC-coupled to a 150

Ω 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

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

Quad Video (Filter) Amplifiers with Input

Sync-Tip Clamps

________________________________________________________________

Maxim Integrated Products

1

19-4453; Rev 0; 2/09

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.

Typical Application Circuits and Pin Configuration appear

at end of data sheet.

UNKNOWN

BIAS

300mV

LPF*

CLAMPREF

OUT0

IN0

LPF*

CLAMPREF

OUT1

IN1

LPF*

CLAMPREF

OUT2

IN2

*LOWPASS FILTER IN MAX9658 ONLY.

LPF*

CLAMPREF

OUT3

IN3

SHDN

MAX9657/MAX9658

GND

Functional Diagram

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.