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SAA7284

Features: · Single-chip solution including FM and vision filters, analog demodulator and audio switching· Dual standard with automatic selection between PAL system I and BGH· Suitable for conventional intercarrier PLL-IF (single SAW) TV/VCR systems· Single low-radiation crystal oscillator for impr...

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SeekIC No. : 004484046 Detail

SAA7284: Features: · Single-chip solution including FM and vision filters, analog demodulator and audio switching· Dual standard with automatic selection between PAL system I and BGH· Suitable for convention...

SAA7284 Data Sheet

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Part Number:
SAA7284
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· Single-chip solution including FM and vision filters, analog demodulator and audio switching
· Dual standard with automatic selection between PAL system I and BGH
· Suitable for conventional intercarrier PLL-IF (single SAW) TV/VCR systems
· Single low-radiation crystal oscillator for improved EMC
· Stereo bitstream audio DACs
· Programmable attenuator for matching levels of NICAM and FM audio sources at the output of the device
· Full EBU specification NICAM 728 demodulation and decoding
· Digital Audio Interface conforming with EBU/IEC 958
· Automatic mute function which switches from NICAM to FM sound when NICAM fails
· Compatible with either single-ended or differential DQPSK input signals
· Microcomputer controlled via I2C-bus (up to 400 kHz specification).


Application

· Television receivers
· Video cassette recorders.


Specifications

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
VDDF1, VDDF2, VDDA

VSSF1, VSSF2, VSSA

VI(max)

VO(max)

IIOK

IO(max)

Tamb

Tstg

Vstat(HBM)

Vstat(MM)		 supply voltage (all supplies)

ground supply voltage

maximum input voltage (any input)

maximum output voltage

DC input or output diode current

output current (each output)

ambient operating temperature

storage temperature

electrostatic handling
Human Body Model
Machine Model		 note 1
















note 2
note 3		 -0.3

VSSD - 0.5

0

0

-

-

-20

-55


-2000
-200		 +6.5

VSSD + 0.5

VDD

VDD

±20

±10

+70

+125


+2000
+200		 V

V

V

V

mA

mA

°C

°C


V
V
Notes
1. All VDD and VSS connections must be made externally to the same power supply.
2. Electrostatic handling is equivalent to discharging a 100 pF capacitor via a 1.5 kW series resistor with a 15 ns rise time.
3. Electrostatic handling is equivalent to discharging a 200 pF capacitor via a 0 W series resistor with a 15 ns rise time.


Description

Philips Semiconductors have pushed the boundaries of Stereo Sound further with this addition to the successfulTerrestrial Digital Sound Decoder family. The SAA7284 device is an application specific version of the existing SAA7283, with guaranteed improved specification on selected parameters, enabling comparable RF performance in conventional intercarrier PLL-IF systems, to that of the SAA7283 in QSS systems.

The SAA7284 takes, as input, a second IF (intercarrier) Terrestrial TV PAL signal, and performs all the Differential Quadrature Phase Shift Keying (DQPSK) demodulation, digital decoding and digital-to-analog conversion necessary to produce a complete NICAM SAA7284 receiver on a single integrated circuit.

The demodulator function of SAA7284 includes integrated baseband filters for pulse shaping and unwanted signal rejection, automatic gain control, a low jitter integrated VCO, digital monostables for precise data sampling points and a multi-standard controller to enable automatic locking to either a PAL system I or PAL system BGH input signal.

The decoder function of SAA7284 performs the descrambling, de-interleaving and reformatting operations required to recover the original data words.

The data words of SAA7284 are processed through a stereo digital filter, digital de-emphasis network, second order noise shaper and 256 times oversampling Bitstream audio DAC.




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