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 including French NICAM L system)
· 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 NICAM 728 specification 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.Pinout
Specifications
| SYMBOL |
PARAMETER |
CONDITIONS |
MIN. |
MAX. |
UNIT |
| VDDF1, VDDF2, VDDA |
supply voltage (all supplies) |
note 1 |
-0.3 |
+6.5 |
V |
| VSSF1, VSSF2, VSSA |
ground supply voltage |
|
VSSD - 0.5 |
VSSD + 0.5 |
V |
| VI(max) |
maximum input voltage (any
input) |
|
0 |
VDD |
V |
| VO(max) |
maximum output voltage |
|
0 |
VDD |
V |
| IIOK |
DC input or output diode current |
|
- |
±20 |
mA |
| IO(max) |
output current (each output) |
|
- |
±10 |
mA |
| Tamb |
ambient operating temperature |
|
-20 |
+70 |
°C |
| Tstg |
storage temperature |
|
-55 |
+125 |
°C |
Vstat(HBM)
Vstat(MM) |
electrostatic handling
Human Body Model
Machine Model |
note 2
note 3 |
-2 000
-2 00 |
+2000
+200 |
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 k series resistor with a 15 ns rise time.
3. Electrostatic handling is equivalent to discharging a 200 pF capacitor via a 0 series resistor with a 15 ns rise time.
DescriptionThe SAA7283 is a NICAM receiver solution, developing the well established high quality Terrestrial Digital Sound decoder family from Philips Semiconductors.
This innovative IC SAA7283 with analog front-end, offers more impressive features and flexibility with minimum external circuitry.
The SAA7283 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 receiver on a single integrated circuit.
The demodulator function of SAA7283 includes integrated baseband filters for pulse shaping and unwanted signal rejection, automatic gain control, a low jitter integrated VCO, digital monostable 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 (including French NICAM L system).
The decoder function of SAA7283 performs the descrambling, de-interleaving and reformatting operations required to recover the original data words.
The data words of SAA7283 are processed through a stereo digital filter, digital de-emphasis network, second order noise shaper and 256 times oversampling Bitstream audio DAC. The SAA7283 then provides a switching output buffer for selecting between FM, NICAM and daisy-chain inputs, and a programmable level attenuation matrix for matching levels of the FM and NICAM audio sources at the output of the SAA7283. An additional feature is the inclusion of a Digital Audio Interface (DAI) output IEC 958, which may be disabled if required.
SAA7283 Data Sheet
