TDA9898HLSLASHV3 datasheet(47/103 Pages) NXP

47 / 103 page

TDA9897_TDA9898_4

Product data sheet

Rev. 04 — 25 May 2009

47 of 103

NXP Semiconductors

TDA9897; TDA9898

Multistandard hybrid IF processing

Tuner AGC; pin TAGC

TAGC integral loop mode (W6[7:6] = 10); TAGC is current output; applicable for negative modulation only; unmodulated VIF;

see Table 44 and Figure 13

Vi(IF)(RMS)

RMS IF input voltage

for TOP1; at starting point

of tuner AGC takeover;

Isink(TAGC) = 100 µA

W9[4:0] = 0 0000

59.6

µV

W9[4:0] = 1 0000

78.3

µV

W9[4:0] = 1 1111

98.5

µV

αacc(set)TOP1

TOP1 setting accuracy

−2

Isource

source current

TAGC charge current

W9[5] = 0

0.20

0.33

0.45

µA

W9[5] = 1

1.6

2.5

3.4

µA

fast mode activated by

internal level detector;

W9[5] = 0

711

µA

fast mode activated by

internal level detector;

W9[5] = 1

120

µA

Isink

sink current

TAGC discharge current;

VTAGC =1V

375

500

625

µA

∆αacc(set)TOP1/∆T TOP1 setting accuracy

variation with temperature

W9[4:0] = 1 0000

0.006

0.02

dB/K

load resistance

[3] 50

Ω

Vsat(u)

upper saturation voltage

pin operating as current

output

VP − 0.3 -

Vsat(l)

lower saturation voltage

pin operating as current

output

0.3

αth(fast)AGC

AGC fast mode threshold

activated by internal fast

AGC detector; I2C-bus

setting corresponds to

W9[4:0] = 1 0000

[3] 6

delay time

before activating; Vi(IF)

below

αth(fast)AGC

Table 53.

Characteristics …continued

VP =5V; Tamb =25 °C; see Table 24 for input frequencies; B/G standard is used for the speciﬁcation (fPC = 38.375 MHz;

fSC = 32.875 MHz; PC / SC = 13 dB; fAF = 400 Hz); input level Vi(IF) = 10 mV (RMS) (sync level for B/G; peak white level

for L); IF input from 50

Ω via broadband transformer 1 : 1; video modulation: Vestigial SideBand (VSB); residual carrier for

B/G is 10 % and for L is 3 %; video signal in accordance with “ITU-T J.63 line 17 and line 330” or “NTC-7 Composite”;

internal Nyquist slope switched on (W7[0] = 0); measurements taken in test circuit of Figure 51; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TDA9898HL/V3 Datasheet(PDF) 47 Page - NXP Semiconductors

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