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June 1994
6
Philips Semiconductors
Product specification
Video analog input interface
TDA8708A
CHARACTERISTICS
V
CCA
= V
22
to V
23
= 4.5 to 5.5 V; V
CCD
= V
6
to V
8
= 4.5 to 5.5 V; V
CCO
= V
7
to V
8
= 4.2 to 5.5 V; AGND and DGND
shorted together; V
CCA
to V
CCD
=
0.5 to +0.5 V; V
CCO
to V
CCD
=
0.5 to +0.5 V; V
CCA
to V
CCO
=
0.5 to +0.5 V;
T
amb
= 0 to +70
°
C; typical readings taken at V
CCA
= V
CCD
= V
CCO
= 5 V and T
amb
= 25
°
C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supplies
V
CCA
V
CCD
V
CCO
I
CCA
I
CCD
I
CCO
analog supply voltage
digital supply voltage
TTL output supply voltage
analog supply current
digital supply current
TTL output supply current
4.5
4.5
4.2
5.0
5.0
5.0
37
24
12
5.5
5.5
5.5
45
30
16
V
V
V
mA
mA
mA
TTL load (see Fig.8)
Video amplifier inputs
VIN(0
TO
2)
INPUTS
V
I(p-p)
input voltage (peak-to-peak value)
AGC load with external
capacitor; note 1
f
i
= 6 MHz
f
i
= 6 MHz
0.6
1.5
V
|
Z
i
|
C
I
I0
AND
I1 TTL
INPUTS
(
SEE TABLE
1)
input impedance
input capacitance
10
20
1
k
pF
V
IL
V
IH
I
IL
I
IH
GATE A
AND
GATE B TTL
INPUTS
(
SEE FIGS
4
AND
5)
LOW level input voltage
HIGH level input voltage
LOW level input current
HIGH level input current
0
2.0
400
0.8
V
CCD
20
V
V
μ
A
μ
A
V
I
= 0.4 V
V
I
= 2.7 V
V
IL
V
IH
I
IL
I
IH
t
W
RPEAK
INPUT
(
PIN
28)
LOW level input voltage
HIGH level input voltage
LOW level input current
HIGH level input current
pulse width
0
2.0
400
2
0.8
V
CCD
20
V
V
μ
A
μ
A
μ
s
V
I
= 0.4 V
V
I
= 2.7 V
see Fig.5
I
28(min)
AGC
INPUT
(
PIN
25)
minimum peak level current
R
28
= 0
80
150
μ
A
V
25(min)
V
25(max)
AGC voltage for minimum gain
AGC voltage for maximum gain
AGC output current
2.8
4.0
see Table 2
V
V
CLAMP
INPUT
(
PIN
24)
V
24
I
24
clamp voltage for code 128 output
clamp output current
3.5
see Table 3
V