TEA6425 데이터 시트보기 (PDF) - STMicroelectronics
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TEA6425 Datasheet PDF : 10 Pages
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ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VI
Toper
Tstg
Parameter
Supply Voltage
Voltage at Pin i to GND
Operating Ambient Temperature
Storage Temperature
Value
12
0, VCC
0, + 70
-20, + 150
TEA6425
Unit
V
V
oC
oC
THERMAL DATA
Symbol
Parameter
Rth (j-a)
Junction-ambient Thermal Resistance
Min.
Value
80
Unit
oC/W
ELECTRICAL CHARACTERISTICS (VCC = 8V, Tamb = 25oC, VIN = 1V, Gain = 6.5dB, Cload = 20pF, Rload
= 4.7kΩ ; Gain condition, clamp and 3-state are controlled by I2C bus, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
SUPPLY
VCC Supply Voltage
ICC Supply Current
RR Supply Voltage Rejection
f = 1kHz
7.2 8 8.8
V
45 60
mA
40 46
dB
VIDEO INPUTS (clamping at bottom sync level)
VIN Max. Signal Amplitude
Vclamp Clamp Level
VDC Input DC Level
IIN
Leakage Current
Iclamp Clamp Current
VIDEO OUTPUTS
Clamp Active
Clamp Active
Clamp Inactive
1 input connected to 1 output
Vclamp - 200mV
2
VPP
1.7 2 2.3
V
2.7 3 3.3
V
2
5
µA
0.9 3
mA
ROUT
ZHI
CHI
G1
Output Resistance
Output "off" Impedance
COUT in 3-state
Voltage Gain
no load
no load
f = 100kHz
15 50
W
50
kΩ
3
pF
0 0.5 1
dB
G2 Voltage Gain
f = 100kHz
6 6.5 7
dB
Vsync
Vbias
Top Level Sync (Y or CVBS)
Output Mean Level (chroma)
G = 6.5dB, Clamp Active
G = 0.5dB, Clamp Inactive
G = 6.5dB, Clamp Inactive
1 1.25 2
V
2 2.4 3
V
3 3.4 4
V
Isolation "off" State
f = 5MHz
60
dB
Crosstalk Attenuation between
Channels
f = 5MHz
50 60
dB
B
Bandwidth
Cload = 20pF, G = 6.5dB
at ± 0.5dB
at ± 1dB
at - 3dB
5
10
MHz
21
FUNCTIONAL DESCRIPTION
This device is controlled via the I2C bus. 4 address-
es can be selected by a 4-level detector on Pin 7,
thus enabling parallel connection of 4 devices.
Via the I2C bus :
– The input signals can be clamped at their nega-
tive peak (top sync).
– The gain factor of the outputs can be selected
between 0.5 and 6.5dB.
– Each of the 6 inputs can be connected to the 8
outputs.
– Each output can individually be set in a high im-
pedance state.
Two internal SVHS mixers will add the selected Y
and C inputs. Two dedicated outputs will have the
option to select this added signal also.
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