View MAX7457ETE_715030.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Preliminary Data
Video Switch for Dual SCART Connectors
General Description
The MAX7457 4-channel video switch is ideal for antialiasing and DAC-smoothing video applications or wherever analog video is reconstructed from a digital data stream such as cable/satellite/terrestrial set-top boxes (STBs), DVD players, hard disk recorders (HDRs), and personal video recorders (PVRs). The MAX7457 filters and buffers CVBS and RGB video signals, making it ideal for dual SCART (peritelevision) STBs with an auxillary CVBS input. The MAX7457 operates from a single +5V supply and has a flat passband out to 5MHz with a stopband attenuation of 43dB at 27MHz, making it ideal for NTSC, PAL, and standard-definition digital TV (SDTV) video systems. The MAX7457 output buffers have a fixed gain of +6dB and are capable of driving two standard 150 video loads. The channel for CVBS video has high-frequency boost circuitry that enhances picture sharpness with up to +1.2dB of gain boost without degradation in the stopband. The video output drivers can be disabled by an external control input. The MAX7457 is available in a 16-pin, 5mm x 5mm x 0.8mm TQFN package, and is specified over the extended (-40C to +85C) temperature range.
Features
4-Channel Video Filter/Buffer for RGB and CVBS Signals with Auxiliary Input Allows Auxiliary Input for CVBS Video LoopThrough Applications Filter Response Ideal for NTSC, PAL, and Interlaced SDTV Video Signals 43dB (typ) Stopband Attenuation at 27MHz 0.75dB (max) Passband Ripple Out to 5MHz Blanking Level Voltage on Cable <1V Each Channel Drives Two 150 Video Loads +5V Single-Supply Operation Available in 5mm x 5mm x 0.8mm, 16-Pin TQFN
MAX7457
Ordering Information
PART MAX7457ETE TEMP RANGE -40C to +85C PIN-PACKAGE 16 TQFN-EP* PKG CODE T1655-2
Applications
STBs/HDRs Game Consoles Desktop Video Editors DVD Players Digital VCRs
*EP = Exposed pad. Pin Configuration appears at end of data sheet.
Typical Operating Circuit
VCC SELA 0.1F INA2 0.1F 2-TO-1 MUX LOWPASS FILTER SYNC DETECTOR +6dB OUTA 75 * 75 75 * 75
AUXILIARY VIDEO SOURCE (VCR, DVD, ETC.) ENCODER
CVBS D/A
INA1
75 0.1F R D/A INB LOWPASS FILTER +6dB OUTB 75
*
75
*
75
75 0.1F G D/A INC LOWPASS FILTER +6dB OUTC 75
*
75
*
75
75 0.1F B D/A IND LOWPASS FILTER +6dB OUTD 75
*
75
*
75
MAX7457
GND DISABLE
*OPTIONAL CAPACITORS
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Video Switch for Dual SCART Connectors MAX7457
ABSOLUTE MAXIMUM RATINGS
VCC to GND ..............................................................-0.3V to +6V INA1, INA2, INB, INC, IND to GND ............-0.3V to (VCC + 0.3V) OUTA, OUTB, OUTC, OUTD to GND .........-0.3V to (VCC + 0.3V) SELA, DISABLE to GND .............................-0.3V to (VCC + 0.3V) Maximum Current into Any Pin Except VCC and GND .....50mA Continuous Power Dissipation (TA = +70C) 16-Pin TQFN (derate 20.8mW/C above +70C)..........................................................1666.7mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Junction Temperature ......................................................+150C Lead Temperature (soldering, 10s) .................................+300C
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.
ELECTRICAL CHARACTERISTICS
(VCC = +5V 5%, CL = 0 to 20pF, RL = 75 to GND for DC-coupled load, RL = 75 to VCC/2 for AC-coupled load, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, TA = +25C.)
PARAMETER Passband Flatness Stopband Attenuation Differential Gain Differential Phase Signal-to-Noise Ratio ASB dG d SNR SYMBOL CONDITIONS Channel INA_ f = 100kHz to 5MHz, relative to 100kHz f 27MHz 5-step modulated staircase 5-step modulated staircase Peak signal (2VP-P) to RMS noise, f = 100Hz to 50MHz Channel INA_ Group Delay Deviation Line-Time Distortion Field-Time Distortion Clamp Settling Time Output DC Clamp Level Low-Frequency Gain Accuracy Low-Frequency Gain Matching Group Delay Matching Channel-to-Channel Crosstalk Disabled Output Impedance Output Short-Circuit Current AV AV(MATCH) tg(MATCH) XTALK ZDISABLE ISC tg HDIST VDIST tCLAMP Deviation from 100kHz to 4.1MHz 18s, 100 IRE bar 130 lines, 18s, 100 IRE bar To 1% Channel INA_ Channel INB, INC, IND f = 100kHz, relative to gain of +6dB Low-frequency channel-to-channel matching, f = 100kHz Low-frequency channel-to-channel matching, f = 100kHz f = 100kHz to 3.58MHz At 5MHz OUT_ shorted to GND or VCC 2 -60 2 70 0.6 1.1 -3 300 0.9 1.5 1.1 1.8 +3 4 Channels INB, INC, IND Channels INB, INC, IND MIN +0.9 -0.75 40 TYP +1.2 +0.15 43 0.15 0.15 80 17 11 30 20 0.3 0.5 ns % % Lines V % % ns dB k mA 0.5 0.5 MAX +1.5 +0.75 dB dB % Degrees dB UNITS
2
_______________________________________________________________________________________
Video Switch for Dual SCART Connectors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V 5%, CL = 0 to 20pF, RL = 75 to GND for DC-coupled load, RL = 75 to VCC/2 for AC-coupled load, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, TA = +25C.)
PARAMETER Input Leakage Current Input Dynamic Swing Mux Crosstalk SUPPLY Supply Voltage Range Supply Current Power-Supply Rejection Ratio LOGIC INTERFACE Logic Input High Voltage Logic Input Low Voltage Logic Input Current VIH VIL VIL = 0 (sink), VIH = VCC (source) 2.0 0.8 10 V V A VCC ICC PSRR No load VIN = 100mVP-P, f = 0 to 3.5MHz 4.75 100 40 5.25 140 V mA dB SYMBOL IIN Channel INA_ Channels INB, INC, IND f = 100kHz to 4.1MHz -60 CONDITIONS MIN TYP MAX 10 1.2 0.9 UNITS A VP-P dB
MAX7457
_______________________________________________________________________________________
3

▲Up To Search▲

Price & Availability of MAX7457ETE

	To Download MAX7457ETE Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .