TDA8505 Datasheet, PDF (14/32 Pages) NXP Semiconductors – SECAM encoder

Philips Semiconductors
SECAM encoder
Preliminary specification
TDA8505
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134); all voltages referenced to V_SSA pin 10.
SYMBOL
PARAMETER
MIN.
MAX.
UNIT
V_DDA
V_DDD
V_ext
T_stg
T_amb
analog supply voltage for encoder part
digital supply voltage
external supply voltage for sandcastle generation
storage temperature
operating ambient temperature
0
5.5
V
0
5.5
V
0
13.2
V
−65
+150
°C
−25
+70
°C
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
R_{th j-a}
thermal resistance from junction to ambient in free air
VALUE
60
UNIT
K/W
DC CHARACTERISTICS
V_CC and V_DD = 5 V; T_amb = 25 °C; all voltages referenced to pins 10 and 30; unless otherwise specified.
SYMBOL
PARAMETER
MIN. TYP. MAX.
V_DDA
V_DDD
I_DDA
I_DDD
V_ext
P_tot
V_ref
analog supply voltage for encoder part (pin 8)
digital supply voltage (pin 32)
analog supply current
digital supply current
external supply voltage for sandcastle generation
total power dissipation
reference voltage output (pin 17)
4.5
4.5
−
−
0
−
2.425
5.0
5.0
39
4
8 to 12
215
2.5
5.5
5.5
−
−
13.2
−
2.575
UNIT
V
V
mA
mA
V
mW
V
AC CHARACTERISTICS
V_CC and V_DD = 5 V; T_amb = 25 °C; composite sync signal connected to pin 29; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Encoder circuit: input stage (pins 1, 3, 5, 7, 9 and 11; black level = clamping level
V_n(max)
voltage from black level positive
1.2
−
−
V
V_n(min)
voltage from black level negative only pins 1, 3 and 5
0.9
−
−
V
I_bias(max)
maximum input bias current
V_I = V₁₇
−
−
1
µA
V_I
input voltage clamped
input capacitor
−
V₁₇
−
V
connected to ground
Z_I
input clamping impedance
I_I = 1 mA
I_O = 1 mA
−
80
−
Ω
−
80
−
Ω
July 1994
14