TDA9178 datasheet(18/36 Pages) PHILIPS

18 / 36 page

1999 Sep 24

Philips Semiconductors

Preliminary speciﬁcation

YUV one chip picture improvement based on luminance

vector-, colour vector- and spectral processor

TDA9178

COLOUR TRANSIENT IMPROVEMENT

tr(min)

minimum rise time 10% to 90%

note 5

−

COLOUR DEPENDENT SHARPNESS

fpc

peaking centre frequency

1fH mode

−

2.0

−

MHz

2fH mode

−

4.0

−

MHz

Qmax

maximum contour amplitude at

centre frequency

note 3

−

SCAVEM

SCAVEM OUTPUT (PIN SOUT)

Vo(cl)

output voltage level during

clamping

−

2.2

−

gain luminance input to SCAVEM

output

0.93

1.04

1.15

bandwidth

1fH mode (−1 dB)

−−

MHz

2fH mode (−1 dB)

6.0

−−

MHz

output resistance

−−

150

Ω

Io(bias)

output bias current

0.8

−−

load capacitance

−−

td(SOUT-YOUT)

delay w.r.t. YOUT

−−20

−

Successive approximation ADC

ADC INPUTS (PINS ADEXT1, ADEXT2 AND ADEXT3)

VFS

full-scale input voltage range

with respect to ground

−

2.0

−

Ii(bias)

input bias current

−−

0.1

µA

RES

data path resolution

−

bit

DLE

differential linearity error

−−

LSB

ILE

integral linearity error

−−

LSB

fcon

conversion frequency

ADEXT1

−

1fV

−

ADEXT2; ADEXT3

−

0.5fV

−

Qadt

conversion time (video lines)

each channel

−

lines

Timing

SANDCASTLE INPUT (PIN SC)

Ii(bias)

input bias current

−−

µA

Vsc(bn)

detection level for blank

no clamping

0.9

1.15

1.40

Vsc(bc)

detection level for clamp

−

0.9Vtop

−

tW(bk)

burst key pulse width

1fH mode

1.8

−−µs

2fH mode

0.9

−−µs

vertical retrace time

−−

lines

Vbk(var)(p-p)

ripple on sandcastle burst key level

(peak-to-peak value)

−−

0.04Vtop V

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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