Features: · Integrated switched capacitor filters
· Demodulation of the European Radio Data System (RDS) or the USA Radio Broadcast Data System (RBDS) signal
· RDS and RBDS block detection
· Error detection and correction
· Fast block synchronization
· Synchronization control (flywheel)
· Mode control for RDS/RBDS processing
· Different RDS/RBDS block information output modes (e.g. A-block output mode)
· Fast I2C-bus interface
· Multi-path detector
· Signal quality detector with sensitivity adjustment
· Pause detector with pause level and time adjustment
· Alternatively oscillator frequency: n × 4.332 MHz (n = 1 to 4)
· UART compatible with 17.328 MHz (n = 4)
· CMOS device
· Single supply voltage
· Extended temperature range (-40 to +85 °C).Pinout
Specifications
| SYMBOL |
PARAMETER |
CONDITIONS |
MIN. |
MAX. |
UNIT |
| VDD |
supply voltage |
|
0 |
6.5 |
V |
| Vn |
voltage at pins 1 to 5, 8 to 13, and
16 to 20 with respect to pins 6 and 15 |
|
-0.5 |
VDD + 0.5 6.5 |
V |
| Ii |
input current
pins 1 to 5, 8, 10 to 13 and 16 to 20
pin 9 |
|
-10
-20 |
+10
+20 |
mA
mA |
| Ilu(prot) |
latch-up protection current in pulsed
mode |
Tamb = -40 to +85 °C with
voltage limiting -2 to +10 V |
-100 |
+100 |
mA |
Tamb = 25 °C with voltage
limiting -2 to +12 V |
-200 |
+200 |
mA |
Tamb = -40 to +85 °C
without voltage limiting |
-10 |
+10 |
mA |
| Tamb |
operating ambient temperature |
|
-40 |
+85 |
°C |
| Tstg |
storage temperature |
|
-65 |
+150 |
°C |
| Ves |
electrostatic handling |
note 1 |
-4000 |
+4000 |
V |
| note 2 |
-250 |
+200 |
V |
Notes
1. Human body model (equivalent to discharging a 100 pF capacitor through a 1.5 k series resistor). Except pin 17: -4000 V minimum and +2500 V maximum.
2. Machine model (equivalent to discharging a 200 pF capacitor through a 0 series resistor and 0.75 H inductance).
DescriptionToday most FM radio stations in Europe and meanwhile also many FM/AM radio broadcasting stations in the USA transmit the inaudible European RDS (Radio Data System) or the USA RBDS (Radio Broadcast Data System) informations respectively. Likewise nowadays receivers, most car radios and also some home and portable radios of SAA6588 on the market include at least some of the RDS features.
The RDS/RBDS system SAA6588 offers a large range of applications by its many functions to be implemented. For car radios the most important are:
· Program Service (PS) name
· Traffic Program (TP) identification
· Traffic Announcement (TA) signal
· Alternative Frequency (AF) list
· Program Identification (PI)
· Enhanced Other Networks (EON) information.
The RDS/RBDS pre-processor is a CMOS device that SAA6588 integrates all RDS/RBDS relevant functions in one chip. The IC contains filtering and demodulation of the RDS/RBDS signal, symbol decoding, block synchronization, error detection, error correction and additional detectors for multi-path, signal quality and audio signal pauses. The pre-processed RDS/RBDS information of SAA6588 is available via the I2C-bus.
The RDS/RBDS SAA6588 pre-processor replaces a number of ICs and peripheral components used nowadays in car radio concepts with RDS or RBDS features. The integration of the relevant RDS/RBDS data processing functions provides, in an economic manner, high performance of RDS/RBDS processing and reduces the real-time requirements for the main radio microcontroller considerably. In addition SAA6588 simplifies the development of the RDS specific software for the main controller of the radio set.
Compared with standard radio systems, RDS/RBDS SAA6588 controlled radio systems additionally require an RDS/RBDS demodulator with a 57 kHz band-pass filter, information about the current reception situation (reception quality, multi-path disturbance etc.), and additional microcontroller power for RDS/RBDS SAA6588 data processing, decoding and radio control.
The new RDS/RBDS SAA6588 pre-processor includes all these specific functions and meets all requirements of a high end RDS/RBDS radio. Moreover the timing requirements of the set controller, regarding RDS/RBDS SAA6588 data processing are
reduced due to the integration of decoder functions, so that the development of radio control software can be concentrated specifically on radio set features.
SAA6588 Data Sheet
