TDA9881HN NXP [NXP Semiconductors], TDA9881HN Datasheet

TDA9881HN

Manufacturer Part Number

TDA9881HN

Description

Alignment-free vision and FM sound IF PLL demodulator for negative modulated TV standards

Manufacturer

NXP [NXP Semiconductors]

Datasheet

1.TDA9881HN.pdf (42 pages)

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1. General description

2. Features

3. Applications

The TDA9881 is an alignment-free multistandard (PAL and NTSC) vision and sound

IF signal PLL demodulator for negative modulation, including Quasi Split Sound (QSS) or

intercarrier FM processing.

TDA9881

Alignment-free vision and FM sound IF PLL demodulator for

negative modulated TV standards

Rev. 01 — 16 November 2004

5 V supply voltage

Gain controlled wideband Vision Intermediate Frequency (VIF) ampliﬁer; AC-coupled

Multistandard true synchronous demodulation for negative modulated standards with

active carrier regeneration: very linear demodulation, good intermodulation ﬁgures,

reduced harmonics and excellent pulse response

Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free, frequencies

switchable via logic pin VIF0 and pin QSSO with resistor

Digital acquisition help circuit, VIF frequencies of 38.0 MHz, 38.9 MHz, 45.75 MHz and

58.75 MHz

4 MHz reference frequency input signal from Phase-Locked Loop (PLL) tuning system

or operating as crystal oscillator

VIF Automatic Gain Control (AGC) detector for gain control; operating as peak sync

detector

VIF AGC monitor output at pin VAGC

Precise fully digital Automatic Frequency Control (AFC) detector with 4-bit

digital-to-analog converter

TakeOver Point (TOP) adjustable with potentiometer

Fully integrated sound carrier trap for 4.5 MHz, 5.5 MHz, 6.0 MHz and 6.5 MHz;

controlled by FM PLL oscillator

Sound IF (SIF) input for single reference Quasi Split Sound (QSS) mode; PLL

controlled

SIF AGC for gain controlled SIF ampliﬁer; single reference QSS mixer able to operate

in high performance single reference QSS mode or in intercarrier mode; switchable via

SIF input pins

Alignment-free selective FM PLL demodulator with high linearity and low noise.

TV, VTR, PC and Set-Top Box (STB) applications.

Product data sheet

Related parts for TDA9881HN

TDA9881HN Summary of contents

Page 1

TDA9881 Alignment-free vision and FM sound IF PLL demodulator for negative modulated TV standards Rev. 01 — 16 November 2004 1. General description The TDA9881 is an alignment-free multistandard (PAL and NTSC) vision and sound IF signal PLL demodulator for ...

Page 2

Philips Semiconductors 4. Quick reference data Table 1: Quick reference data Symbol Parameter V supply voltage P I supply current P Video part V VIF input voltage sensitivity i(VIF)(rms) (RMS value) G VIF gain control range VIF(cr) f vision carrier ...

Page 3

... Pin REF is able to operate as a 1-pin crystal oscillator input as well as an external reference signal input, e.g. from the tuning system. 5. Ordering information Table 2: Ordering information Type number Package Name TDA9881TS SSOP24 TDA9881HN HVQFN32 9397 750 13417 Product data sheet Alignment-free vision and FM sound IF PLL demodulator …continued Conditions FM Hz; ...

Page 4

... INTERCARRIER MIXER SIF1 23 (26) SUPPLY SIF AGC C AGC 20 (22) 18 (20 AGND i.c. Pin numbers for TDA9881HN in parenthesis. Fig 1. Block diagram. external reference signal or 4 MHz crystal VIF PLL filter VPLL REF 19 (21) 15 (16) RC VCO DIGITAL VCO CONTROL AFC DETECTOR SOUND TRAPS 4 ...

Page 5

... AMUTE0 15 REF 14 TAGC 13 VIF0 001aab340 Fig 3. Pin conﬁguration for HVQFN32. Rev. 01 — 16 November 2004 terminal 1 i. FMPLL DEEM 3 AFD 4 TDA9881HN 5 DGND 6 n.c. FMSO 7 TOP 8 Transparent top view © Koninklijke Philips Electronics N.V. 2004. All rights reserved. TDA9881 24 VAGC 23 AFC VPLL ...

Page 6

... P AFC VAGC n.c. SIF1 SIF2 n.c. n.c. 9397 750 13417 Product data sheet Alignment-free vision and FM sound IF PLL demodulator Pin description Pin Description TDA9881TS TDA9881HN 1 30 VIF differential input VIF differential input not connected 3 1 internally connected; leave open PLL for loop ﬁlter ...

Page 7

Philips Semiconductors 8. Functional description A simpliﬁed block diagram of the device is illustrated in following functional blocks: 1. VIF ampliﬁer 2. Tuner AGC and VIF AGC 3. VIF AGC detector 4. Frequency Phase-Locked Loop (FPLL) detector 5. VCO and ...

Page 8

Philips Semiconductors 8.4 FPLL detector The VIF ampliﬁer output signal is fed to a frequency detector and a phase detector via a limiting ampliﬁer to remove the video AM. During acquisition the frequency detector produces a current that is proportional ...

Page 9

Philips Semiconductors The AFC signal is derived from the corresponding downcounter stop value after a counting cycle. The last four bits are latched and the digital-to-analog converted value is given as current at pin AFC. 8.7 Video demodulator and ampliﬁer ...

Page 10

Philips Semiconductors 8.11 Single reference QSS mixer With the present system high performance Hi-Fi stereo sound processing can be achieved. For a simpliﬁed application without an SIF SAW ﬁlter, the single reference QSS mixer can be switched to the intercarrier ...

Page 11

Philips Semiconductors 8.13 Audio ampliﬁer and mute time constant The audio ampliﬁer consists of two parts: • AF preampliﬁer • AF output ampliﬁer. The AF preampliﬁer used for FM sound is an operational ampliﬁer with internal feedback, high gain and ...

Page 12

... AGND, DGND and TAGC pin TAGC short-circuit time to ground storage temperature ambient temperature TDA9881TS (SSOP24) TDA9881HN (HVQFN32) electrostatic discharge human body voltage model machine model Rev. 01 — 16 November 2004 TDA9881 FM carrier frequency De-emphasis ( s) (MHz) 4 ...

Page 13

... Philips Semiconductors 10. Thermal characteristics Table 9: Thermal characteristics Symbol Parameter R thermal resistance from junction to ambient th(j-a) TDA9881TS (SSOP24) TDA9881HN (HVQFN32) 11. Characteristics Table 10: Characteristics see Table 12 P amb f = 33.4 MHz; PC/ dB broadband transformer video modulation DSB; residual carrier for B video signal in accordance with “CCIR line 17 and line 330” ...