TDA8708 datasheet(10/24 Pages) PHILIPS

10 / 24 page

June 1994

Philips Semiconductors

Product speciﬁcation

Video analog input interface

TDA8708A

Table 1 Video input selection (CVBS).

Table 2 AGC output current.

Note

1. X = don't care.

2. Mode 2 can only be initialized with successive pulses

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

SELECTED INPUT

VIN0

VIN1

VIN2

GATE A GATE B

DIGITAL

OUTPUT

IAGC

MODE(2)

output

< 255 −2.5 µA1

output

> 255 IAGCM

0X(1)

output

< 248 0 µA2

output

> 248 IAGCM

output

< 0

+2.5

µA2

0 < output <

248

−2.5 µA2

output > 248

IAGCM

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

< 0ICLAMPM

output

> 0

−2.5 µA1

X(1)

0X(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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