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PDF SM5304AV Data sheet ( Hoja de datos )
| Número de pieza | SM5304AV | |
| Descripción | Video Buffer with Built-in Analog LPF | |
| Fabricantes | Nippon Precision Circuits | |
| Logotipo |  |
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SM5304AV
Video Buffer with Built-in Analog LPF
OVERVIEW
The SM5304AV is a 75Ω terminating resistance drive video buffer with built-in analog filter. The filter cutoff
frequency, controlled by the resistance connected to RFC pin, can be set to match any system resolution. The
output buffer can be selected 0dB, 6dB, and 12dB. The feedback point occurs after the external coupling
capacitors, and the coupling capacitances can be reduced.
FEATURES
I 5V ± 10% supply voltage
I Adjustable cutoff frequency using external resistor
I 0dB, 6dB, 12dB selectable gain using logic signal
I ± 0.5dB output gain error
I Two systems (two load resistances) can be driven
I 0.7% output signal harmonic distortion
I Sag compensation circuit built-in
I Package: 8-pin VSOP (Pb free)
APPLICATIONS
I DVD
I Digital still camera
I Digital VHS
PINOUT
(Top view)
VIN 1
ENABLE
RFC
VCC 4
8 GSEL
VF
VOUT
5 GND
ORDERING INFORMATION
Device
SM5304AV
Package
8-pin VSOP
PACKAGE DIMENSIONS
(Unit: mm)
Weight: 0.04g
0 to 10
0.575typ
3.1 ± 0.3
0.15+−00.1.05
0.65
0.10
0.22 ± 0.1
0.12 M
NIPPON PRECISION CIRCUITS INC.—1
1 page  
SM5304AV
FUNCTIONAL DESCRIPTION
RFC Frequency Control
Characteristics
The cutoff frequency (fc) is controlled by the resistor connected to RFC pin (RFC). The characteristics about fc
versus RFC is shown in table 1.
Table 1. RFC and frequency control range
RFC [kΩ]
18
Cutoff frequency [MHz]
1.9
15 2.3
12 2.8
10 3.3
8.2 3.9
6.8 4.6
5.6 5.5
4.7 6.4
4.3 6.9
3.9 7.5
3.3 8.7
2.7 10.5
Adjustment methods
It can set up by the following methods. Since resistance affects cutoff frequency, please use a high precise
thing.
I Fixed resistor
The frequency can be adjusted using an external resistor connected to RFC.
RFC
NIPPON PRECISION CIRCUITS INC.—5
5 Page 
SM5304AV
NOTES ON USE
Capacitors Between Power Supply Pin
Please be sure to connect a capacitor between power supply pin (VCC, GND) for preventing the oscillation of
an output and supplying a power supply stable. Electrolytic capacitor about 1µF to 10µF and ceramic capacitor
about 0.01µF to 0.1µF are recommended. Please connect a ceramic capacitor to near between power supply
pin, shown in a figure.
VCC
GND
Range of Power Dissipation and Ambient Temperature
Operating condition range (power supply and ambient temperature) which is not exceeded package power dis-
sipation and package junction temperature shown in the item of Absolute Maximum Rating are shown in a fig-
ure. However this range is calculated from the package thermal resistance under the mounting conditions
which NPC specified, and when mounting conditions differ from this condition, it does not become such.
PD = ( Tjmax − Ta ) / θja
Tjmax = 125 C, θja = 214 C/W
300
187
0 −40
60.8 85
Ta [ C]
Mounting conditions
• glass epoxy board
• board size: 40mm × 40mm
• wiring density: 10%
• still air
The following method is effective, in order to lower thermal resistance and to prevent the rise of junction tem-
perature.
• Wiring area connected to the pin of SM5304AV is made widely.
• To cool down, use the cooling fan etc.
NIPPON PRECISION CIRCUITS INC.—11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet SM5304AV.PDF ] | |
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