HDTV和SDTV是数字电视(DTV)中的两类显示格式,具有HDTC或SDTV功能的新的电视机,它的接收器将会把信号转换成原本的格式.当人们不断从模拟电视" title="模拟电视">模拟电视向数字电视过度时,DTV市场将会有大幅度的增幅.下面是TI HDTV系统的方框图.图中表明了TI所提供的元件.

HDTV系统的方框图

其中部分元器件为:
TFP501/TFP503: PanelBus HDCP Digital Receivers
TPA3102D1/TPA3100D2: 10/20-W Stereo Class-D Audio Amps
TPA505x: Adjustable Digital Delay IC
TAS5504: I2S-to-PWM Processor
TPA3300D2: 20-W Digital Power Stage
TPA6110A2: Stereo Class AB Headphone Driver
PCM178x: High-Performance Stereo DAC Converters
TPA2008D2: 3-W Stereo Class-D Audio Amplifier
TPA6030A4: 3-W Stereo Class-AB Audio Amplifier
CDCE906: Programmable 3-PLL Clock Synthesizer
CDCD5804: Rambus XDR Clock Generator
TAS3004: Digital Audio Processor with CODEC
TAS5122: 30-W Digital Amplifier Power Stage
TPA4411: Cap-Free Stereo Headphone Amplifier
LM317M: 3-Terminal Adjustable Regulator
MAX3243C/I: Multi-Channel RS-232 Line Driver/Receiver
TL52055: 2-Input, 1 Output, 3-Circuit Video Switch
TS3DV416: 4-Channel Differential 8:16 MUX Switch
TS3DV520: 5-Channel Differential 10:20 MUX Switch
下面是对各个元器件的性能和方框图进行描述:
The TFP501 and TFP503 are TI PanelBus flat panel display products, part of a comprehensive family of end-to-end DVI 1.0-compliant solutions. The TFP501/TFP503 support display resolutions up to UXGA, including the standard HDTV formats, in 24-bit true-color pixel format.
The TFP501/TFP503 offer design flexibility to drive one or two pixels per clock, support TFT or DSTN panels and provide an option for time-staggered pixel outputs for reduced ground-bounce.

Key Features

* Supports UXGA resolution (output pixel rates up to 165 MHz)
* Digital visual interface (DVI) and high-bandwidth digital content protection (HDCP) specification compliant
* Encrypted external HDCP device key storage for exceptional security and ease of implementation
* True color, 24 bits/pixel, 48-bit dual-pixel output mode; 16.7/M colors at one or two pixels per clock
* 4 oversampling for reduced bit-error rates and better performance over longer cables
* Supports hot-plug detection
* Packaging: 100-pin TQFP PowerPAD

Applications

* Desktop LCD monitors
* DLP and LCD projectors
* Digital TVs
下图为TFP501的方框图:

The TPA3100D2 and TPA3101D2 are efficient, Class-D audio power amplifiers designed for driving bridge-tied stereo speakers. The TPA3100D2 can drive stereo speakers as low as 4 The high efficiency of the TPA3100D2 (92%) eliminates the need for an external heat sink
when music is played.

Key Features

* Efficient Class-D operation
* Wide 10- to 26-V supply voltage operation
* Four integrated gain settings
* Thermal and short-circuit protection
* Fault reporting

Applications

* CRTs
* DLP  TVs
* LCD TVs
* PDPs

The TPA505x series of devices provides a cost-effective, integrated lip-sync solution for TV and home theater applications. The TPA505x family provides up to 170 ms of delay per channel and comes in two stereo versions and one four-channel version.
The ease of use and small footprint make this part ideal for flatpanel TV applications.
Key Features
* 16- to 32-bit I2S input (fS = 32 to 192 kHz)
* Up to 170 ms/ch delay (48 kHz)
* I2C delay-time control allows fine resolution (down to one sample resolution)
* Fixed delay mode (5-ms steps from 20 to 170 ms)
* Cascadable for longer delay time
* Small footprint (4.4 QFN)
* 3- to 3.6-V operation

Applications

* Flat-panel TVs
* DLP, LCD, plasma
* Home theaters
* DVD minicompos

The TAS5504 is a four-channel digital pulse width modulator that provides advanced performance and high-level system integration. It is designed to interface seamlessly with multiple digital audio processors.

Key Features

* Four-channel digital audio pulse width modulation (PWM) processor
* I2S inputs
* PWM output
* Supply voltage: 3.3 V
* Inputs are 5-V tolerant
* High-performance digital audio (DAP)
* 48-bit audio processing
* Dynamic range: > 102 dB
* Sampling rates: 32 kHz to 192 kHz
* Four bass and treble tone controls

Applications

* Plasma TVs

The TPA3300D2 is a fully integrated power stage accepting PWM inputs and 20 W.2 output. It is TI’s first power stage with integrated feedback, allowing very high PSRR and improved audio performance. In addition, it detects fault conditions such as over-current or  over-temperature.

Key Features

* Efficient Class-D operation
* Wide 10- to 26-V supply voltage operation
* Direct connection to PWM processor
* High-power-supply rejection
* Fault reporting

Applications

* CRTs
* DLP  TVs
* LCD TVs
* PDPs

The TPA6110A2 is a stereo headphone driver designed to connect directly to the TPA3004D2 or TPA3002D2 with minimal external components.
The integrated depop circuitry nulls “pops” and “clicks” during startup or shutdown transitions.

Key Features

* 150-mW stereo into 16 from 4.5 V with < 0.1% THD+N
* Full short-circuit and thermal protection
* Excellent depop circuitry
* Low supply current: 1.5 mA from 5 V

Applications

* Large-screen multifunction monitors and LCD TVs
* Portable DVD players

The PCM1780/81/82 are cost-effective, high-performance stereo digitalto-analog converters. Utilizing TI’s enhanced multi-level delta-sigma architecture, they achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1780 is footprint-compatible with the PCM1680 eight-channel DAC, enabling faster design time for multiple product families.
Key Features

* THD+N: 0.002%
* Dynamic range and SNR: 106 dB
* Full-scale output: 3.9 VPP (typ)
* Sampling rate: 5 to 200 kHz
* System clock: 128 fS, 192 fS, 256 fS, 384 fS, 512 fS, 768 fS or 1152 fS
* Single power supply: +5 V
* Packaging: 16-pin SSOP, Pb-Free

Applications

* AV receivers
* DVD movie players
* DVD audio players
* HDTV receivers

The TPA2008D2 is an analog input Class-D audio power amplifier that will drive 3-W stereo into 3 speakers without a heat sink or large output filter components. The output power level and integrated DC volume control is ideal for multifunction monitors (MFMs).

Key Features

* 3-W stereo into 3 from 5 V with 10% THD+N
* Filter-free modulation
* Filter not required for efficiency or audio quality, but a low-cost ferrite bead will reduce EMI
* Improved efficiency
* Improved SNR: 96 dB
* Full short-circuit and thermal protection
* DC volume control

Applications

* Multifunction monitors
* LCD TVs

The TPA6030A4 is a fully integrated stereo speaker, stereo headphone and DC volume control audio solution. Features like integrated depop circuitry that null pops and clicks during startup or shutdown transitions and the 12-V operation make the TPA6030A4 ideal for multifunction monitors (MFMs).

Key Features

* 3-W stereo into 16 from 12 V with 10% THD+N
* Supply voltage range: 7 V to 15 V
* Integrated stereo headphone driver
* DC volume control
* Excellent depop circuitry
* Full short-circuit and thermal protection
* Integrated gain set to 1.5 V/V

Applications

* Multifunction monitors
* LCD TVs

The CDCE906 provides almost any programmable frequency up to 167 MHz while maintaining a typical period jitter of 60 ps. Additionally, it includes programmable spread spectrum, slew rate control and selectable output voltages. All options can be hot-programmed and locked in
on the integrated chip EEPROM while the device is in the system.

Key Features

* Wide PLL divider ratio allows 0-ppm output clock error
* Generates video (27 or 54 MHz) and audio system clocks from multiple sampling frequencies; fS = 16, 22.05, 24, 32, 44.1, 48 or 96 kHz
* Accepts crystal frequencies from 8 to 54 MHz
* Accepts LVCMOS or differential input frequencies from 1 to 160 MHz
* Programmable center spread spectrum clocking (SSC) modulation
(0.2%, 0.5% and 0.8%)
* Programmable down SSC modulation (1.0%, 1.5%, 2.0% and 3%)
* Programmable output slew-rate control (SRC) for lowering system EMI
* Separate power supplies for outputs (2.5 to 3.3 V)
* 3.3 V device power supply
* Packaging: 28-pin TSSOP

Applications

* Digital TVs
* Set-top boxes
* Gaming * Video/audio
* Printers/scanners

The CDCD5804 is a Rambus XDR clock generator that supports speeds of 400 to 800 MHz. At the time of this publication, the CDCD5804 meets or exceeds the latest XCG specifications
from Rambus. The 28-pin TSSOP package contains four differential clock outputs, providing an off-the-shelf solution for a broad range of high-performance interface applications.

Key Features

* 400- to 800-MHz clock source
* Spread-spectrum-compatible clock input
* Supports frequency multiplication factors of 3,4,5,6,8,9/2,15/2 and 15/4
* Very low 1- to 6-cycle jitter
* –40 ps: 400 to 635 MHz
* –30 ps: 636 to 800 MHz
* Operates from single 2.5-V supply
* Packaging: 28-pin TSSOP

Applications

* TVs
* Gaming
* Set-top boxes

The TAS3004 device is a system-on-a-chip that replaces conventional analog equalization to perform digital parametric equalization, dynamic range compression and loudness contour. Additionally, this device provides high-quality, soft digital volume, bass and treble control.

Key Features

* I2C control
* Seven band parametric equalization
* Digital bass and treble control
* Digital volume control
* Loudness contour/dynamic bass
* Analog audio input and output
* Voltage supply: 3.3 V
* Sampling rates: 32 kHz, 44.1 kHz or 48 kHz

Applications

* LCD TVs

The TAS5122 is a digital input power stage designed to drive 30-W into stereo speakers with no large external heat sinks. The device incorporates TI’s PurePath Digital technology and is used in conjunction with a digital audio PWM processor and a simple passive demodulation
filter to deliver high-quality, high-efficiency, true-digital audio amplification.

Key Features

* 30-W stereo into 6 from 23 V with < 0.4% THD+N
* Greater than 90% efficient
* 95-dB maximum dynamic range
* Full short-circuit, under voltage and thermal protection with reporting

Applications

* Plasma TVs

The TPA4411 is a stereo headphone driver that eliminates the need for large (often expensive) output capacitors required by other headphone amplifiers to block DC voltages.

Key Features

* 80-mW stereo into 16 from 4.5 V with < 1% THD+N
* Ground-referenced outputs
* Eliminates need for DC blocking capacitors (i.e., cap-free operation)
* Save space and cost
* Improves low frequency (i.e., bass) response
* Greatly reduces pop and click noise during power and shutdown transitions
* Full short-circuit and thermal protection
* Integrated gain set to 1.5 V/V

Applications

* Multifunction monitors
* LCD TVs
* Portable DVD players
* Cellular phones

The LM317M is an adjustable three-terminal positive-voltage regulator capable of supplying more than 500 mA over an output-voltage range of 1.25 V to 37 V. The LM317M is  exceptionally easy to use and requires only two external resistors to set the output voltage.
Furthermore, both line and load regulation are better than standard fixed regulators.

Key Features

* Output voltage: 1.2 V to 37 V
* Output current: > 500 mA
* Internal short-circuit current limiting
* Thermal overload protection

Applications

* LCD TVs
* Multifunction monitors
* Plasma TVs

The MAX3243 device consists of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD human-body model (HBM) protection pin-to-pin (serial-port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector.

Key Features

* Operates up to 250 kbit/s
* Designed to transmit at a data rate of 250 kbit/s
* Low standby current: 1 A typical
* External capacitors: 4 × 0.1 F
* Accepts 5-V logic input with 3.3-V supply
* Always-active noninverting receiver output (ROUT2B)
* Designed to be interchangeable with Maxim MAX3243
* Alternative high-speed pin-compatible device (1 Mbit/s)
* Auto-power-down feature to disable driver outputs when no valid
RS-232 signal is sensed

Applications

* Battery-powered systems
* PDAs
* Notebooks, laptops
* Palmtop PCs
* Hand-held equipment

Texas Instruments now offers the TL52055, a wide-bandwidth 2-input, 1-output, 3-circuit video switch for handling high-quality analog video signals. Unlike conventional video switches, the high-performance TL52055 has a flat frequency response up to 40 MHz with extremely low signal degradation and operates at low voltages (in the 5-V range).
The TL52055 is ideal for high-definition TVs, DVD recorders, set-top boxes, car navigation devices and AV amplifiers.

Key Features

* Wide, flat bandwidth up to 40 MHz (handles 1080i format)
* Same electrical properties and performance with 5-V or 9-V supply voltage
* No need for externally mounted parts like transistors or resistors, due to the high-output-drive current and the push-pull circuit
* Small TSSOP

Applications

* Composite and RGB video

The TS3DV416 is a 16- to 8-bit multiplexer/demultiplexer digital video switch with a single select (SEL) input that controls the data path of the multiplexer/demultiplexer. The device provides a low and flat onstate resistance (ron) and an excellent on-resistance match. Low
input/output capacitance, high bandwidth, low skew and low crosstalk among channels make the TS3DV416 suitable for various digital video applications such as DVI and HDMI.

Key Features

* Wide bandwidth (900 MHz typ, 1.8 Gbps)
* Low crosstalk (XTALK = –41 dB typ)
* Low bit-to-bit skew (tsk(o) = 0.2 ns max)
* Low and flat on-state resistance (ron = 4 typ, ron(flat) = 0.7 typ)
* Low input/output capacitance (Con = 10 pF typ)
* Rail-to-rail switching on data I/O ports (0 to 5 V)
* VDD operating range from 3 to 3.6 V
* Ioff supports partial-power-down mode operation
* Latch-up performance exceeds 100 mA per JESD 78, Class II
* ESD performance tested per JESD 22
* 2000-V human-body model (A114-B, Class II)
* 1000-V charged-device model (C101)

Applications

* Digital video signal switching
* Differential DVI, HDMI signal MUXing for audio/video receivers and high-definition television (HDTV)

The TS3DV520is a 20-bit to 10-bit multiplexer/demultiplexer digital video switch with a single select (SEL) input. It is specifically designed for muxing HDMI signals from two sources. The SEL input controls the data path of the multiplexer/demultiplexer. It can also be used as four
differential channels and two single-ended channels for DDC switching in the HDMI application. This device provides a low and flat ON-state resistance (ron) and an excellent on resistance match. Low input/output capacitance, high bandwidth, low skew, and low crosstalk among
channels make this device suitable for HDMI (including 1080i, 1080p, and 720p modes). It is available in the space-saving 56-pin QFN package.

Key Features

* Wide bandwidth (>1.2 GHz typ, 2.4 Gbps)
* Low crosstalk (XTALK = –41 dB typ)
* Low bit-to-bit skew (tsk(o) = 0.2 ns max)
* Low and flat on-state resistance (ron = 6 max, r on(flat) = 0.5 typ)
* Low input/output capacitance (Con = 8 pF typ)
* Rail-to-rail switching on data I/O ports (0 to 5 V)
* VCC operating range from 3 V to 3.6 V
* Ioff supports partial-power-down mode operation
* Two channels can be used for muxing data display channel (DDC)
* Latch-up performance exceeds 100 mA per JESD 78, Class II
* ESD performance tested per JESD 22
* 2000-V human-body model (A114-B, Class II)
* 1000-V charged-device model (C101)

Applications

* High-speed differential signal switching
* Differential HDMI signal muxing for audio/video receivers and highdefinition
television (HDTV)