TDA4670 데이터 시트보기 (PDF) - Philips Electronics
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TDA4670 Datasheet PDF : 16 Pages
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Philips Semiconductors
Picture Signal Improvement (PSI) circuit
Product specification
TDA4670
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Colour-difference paths measured with transient times tr = tf = 1 µs; tp H ≥ 1 µs; Vi = 1.33 V (p-p) on
pins 3 and 7 and with burst key pulse tBK = 4 µs
Vi(CD)(p-p)
±(R − Y) input signal
(peak-to-peak value; pin 3)
75% colour bar
−
1.05 1.48
V3,7
I3,7
C3,7
V4,6
∆V4,6
Vspike
±(B − Y) input signal
(peak-to-peak value; pin 7)
75% colour bar
−
1.33
input transient sensitivity
V3,7/δt
0.15 −
internal clamping voltage level
−
2.45
input current
outside clamping
−
−
during clamping
±100 −
input capacitance
−
6
DC output voltage
−
2
output offset voltage
RS ≤ 300 Ω; note 1
−
−
during and after storage time −
−
spurious spike signals on pins 4 RS ≤ 300 Ω; note 1
and 6
−
−
1.88
−
−
±1
±190
12
−
±5
±18
±30
I4,6
output current (emitter-follower source current
with constant current source)
sink current
−1
−
−
0.4
−
−
R4,6
output resistance
−
−
100
Gv
signal gain in each path
Vo/Vi
−1
0
+1
∆Gv
gain difference −(R − Y)/−(B − Y)
−
0
±0.3
LIN
signal linearity for
αmin/αmax;
nominal signal
Vi = 1.33 V (p-p)
0.90 −
−
+3 dB signal
Vi = 1.88 V (p-p)
0.65 −
−
∆Vo
signal reduction at higher
signal with tp H = 50 ns;
−1.5 −
−
frequency (output signal ratio
tr = tf = 1 µs
Vi/Vo)
Sandcastle pulse, input voltage selectable via I2C-bus
V17
input voltage threshold for
SC5-bit = 0 (+12 V)
H and V sync
1.1
1.5
1.9
input voltage threshold for burst SC5-bit = 0 (+12 V)
5.5
6.5
7.5
input voltage threshold for
H and V sync
SC5-bit = 1 (+5 V)
1.1
1.5
1.9
input voltage threshold for burst SC5-bit = 1 (+5 V)
3.0
3.5
4.0
R17
input resistance
+12 V input level
+5 V input level
30
40
50
15
20
25
C17
input capacitance
tBK
burst key pulse width
td
leading edge delay for clamping referenced to tBK
pulse
−
4
8
3.0
4.0
4.6
−
1
−
np
number of required burst key
note 2
pulses vertical blanking interval
4
−
31
V
V
V/µs
V
µA
µA
pF
V
mV
mV
mV
mA
mA
Ω
dB
dB
−
−
dB
V
V
V
V
kΩ
kΩ
pF
µs
µs
−
1996 Dec 11
8
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