TDA8708 datasheet(10/24 Pages) PHILIPS

10 / 24 page

1996 Nov 26

Philips Semiconductors

Product speciﬁcation

Video analog input interface

TDA8708B

Table 1 Video input selection (CVBS)

Table 2 AGC output current

Notes

1. Mode 2 can only be initialized with successive pulses

on GATE A and GATE B (see Fig.5).

2. X = don’t care.

SELECTED INPUT

VIN0

VIN1

VIN2

GATE A GATE B

DIGITAL

OUTPUT

IAGC

MODE(1)

output < 255

−2.5 µA1

output > 255

130

µA1

0X(2)

−

µA2

output < 0

+2.5

µA2

output > 0

−2.5 µA2

Table 3 CLAMP output current

Note

1. X = don't care.

Table 4 OF input coding

Note

1. Use C

≥ 10 pF to DGND.

GATE A GATE B

DIGITAL

OUTPUT

ICLAMP

MODE

output < 0

130

µA1

output > 0

−2.5 µA1

X(1)

µA2

output < 64

+50

µA2

64 < output

−50 µA2

D0 TO D7

active, two’s complement

high impedance

open circuit(1)

active, binary

Table 5 Output coding and input voltage (typical values)

STEP

VADCIN

BINARY OUTPUTS

TWO’S COMPLEMENT

Underﬂow

−

0000000010000000

0VCCA − 2.41 V

0000000010000000

−

0000000110000001

−

................

−

................

254

−

1111111001111110

255

VCCA − 1.41 V

1111111101111111

Overﬂow

−

1111111101111111

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