TDA9897HN: Multistandard hybrid IF processing ARCHIVED

General

• 5 V supply voltage
• I²C-bus control over all functions
• Four I²C-bus addresses provided; selection by programmable Module Address (MAD)
• Three I²C-bus voltage level supported; selection via pin BVS
• Separate gain controlled amplifiers with input selector and conversion for incoming IF [analog Vision IF (VIF) or Sound IF (SIF) or Digital TV (DTV)] allows the use of different filter shapes and bandwidths
• All conventional ATV standards applicable by using DTV bandwidth window (SAW) filter
• Two 4 MHz reference frequency stages; the first one operates as crystal oscillator, the second one as external signal input
• Stabilizer circuit for ripple rejection and to achieve constant output signals
• Smallest size, simplest application
• ElectroStatic Discharge (ESD) protection for all pins

Analog TV processing

• Gain controlled wideband VIF amplifier; AC-coupled
• Multistandard true synchronous demodulation with active carrier regeneration: very linear demodulation, good intermodulation figures, reduced harmonics and excellent pulse response
• Integrated Nyquist processing, providing additionally image suppression for high adjacent channel selectivity
• Optional use of conventional Nyquist filter to support a wide range of applications
• Gated phase detector for L and L-accent standards
• Fully integrated VIF Voltage-Controlled Oscillator (VCO), alignment-free, frequencies switchable for all negative and positive modulated standards via I²C-bus
• VIF Automatic Gain Control (AGC) detector for gain control; operating as a peak sync detector for negative modulated signals and as a peak white detector for positive modulated signals
• Optimized AGC modes for negative modulation; e.g. very fast reaction time for VIF and SIF
• Precise fully digital Automatic Frequency Control (AFC) detector with 4-bit Digital-to-Analog Converter (DAC); AFC bits can be read-out via I²C-bus
• High precise Tuner AGC (TAGC) TakeOver Point (TOP) for negative modulated standards; TOP adjust via I²C-bus
• TAGC TOP for positive standards and Received Signal Strength Indication (RSSI); adjustable via I²C-bus or alternatively by potentiometer
• Fully integrated Sound Carrier (SC) trap for any ATV standard (SC at 4.5 MHz, 5.5 MHz, 6.0 MHz and 6.5 MHz)
• SIF AGC for gain controlled SIF amplifier and high-performance single-reference Quasi Split Sound (QSS) mixer
• Fully integrated sound BP filter supporting any ATV standard
• Optional use of external FM or AM sound BP filter
• AM sound demodulation for L and L-accent standard
• Alignment-free selective FM Phase-Locked Loop (PLL) demodulator with high linearity and low noise; external FM input
• Port function
• VIF AGC voltage monitor output or port function
• TAGC voltage monitor output or port function
• VIF AFC current or tuner, VIF, SIF or FM AGC voltage monitor output
• 2nd SIF output, gain controlled by internal SIF AGC or by internal FM carrier AGC for Digital Signal Processor (DSP)
• Fully integrated BP filter for 2nd SIF at 4.5 MHz, 5.5 MHz, 6.0 MHz or 6.5 MHz

Digital TV processing

• Applicable for terrestrial and cable TV reception
• 70 dB variable gain wideband IF amplifier (AC-coupled)
• Gain control via external control voltage (0 V to 3 V)
• 2 V (p-p) differential low IF (downconverted) output or 1 V (p-p) 1st IF output for direct Analog-to-Digital Converter (ADC) interfacing
• DVB downconversion with integrated selectivity for Low IF (LIF)
• Integrated anti-aliasing tracking low-pass filter
• Fully integrated synthesizer controlled oscillator with excellent phase noise performance
• Synthesizer frequencies for a wide range of world wide DVB standards (for IF center frequencies of e.g. 34.5 MHz, 36 MHz, 44 MHz and 57 MHz)
• TAGC detector for independent tuner gain control loop applications
• TAGC operating as peak detector, fast reaction time due to additional speed-up detector
• Port function
• TAGC voltage monitor output

FM radio mode

• Gain controlled wideband Radio IF (RIF) amplifier; AC-coupled
• Buffered RIF amplifier wideband output, gain controlled by internal RIF AGC
• Use of external FM sound BP filter
• 2nd RIF output, gain controlled by internal RIF AGC or by internal FM carrier AGC for DSP
• Alignment-free selective FM PLL demodulator with high linearity and low noise
• Precise fully digital AFC detector with 4-bit DAC; AFC bits read-out via I²C-bus
• Port function
• Radio AFC or tuner, RIF or FM AGC voltage monitor output

• Analog and digital TV front-end applications for TV sets, recording applications and personal computer cards