SAA6579 datasheet(6/16 Pages) PHILIPS

Part #	SAA6579

Description	Radio Data System RDS demodulator

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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6 / 16 page

1997 Feb 24

6

Philips Semiconductors

Product speciﬁcation

Radio Data System (RDS) demodulator

SAA6579

CHARACTERISTICS

VDDA =VDDD =5V; Tamb =25 °C and measurements taken in Fig.1; unless otherwise speciﬁed.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

VDDA

analog supply voltage (pin 5)

3.6

5.0

5.5

V

VDDD

digital supply voltage (pin 12)

3.6

5.0

5.5

V

Itot

total supply current

I5 +I12

−

6

−

mA

Vref

reference voltage (pin 3)

VDDA =5V

−

2.5

−

V

MPX input (signal before the capacitor on pin 4)

Vi MPX(rms)

RDS amplitude (RMS value)

∆f= ±1.2 kHz RDS;

∆f= ±3.5 kHz ARI; see Fig.5

1

−−

mV

Vi MPX(p-p)

maximum input signal capability

(peak-to-peak value)

f=57

±2 kHz

200

−−

mV

f < 50 kHz

1.4

−−

V

f < 15 kHz

2.8

−−

V

f > 70 kHz

3.5

−−

V

R4-6

input resistance

f = 0 to 100 kHz

40

−−

k

Ω

G8-4

signal gain

f = 57 kHz

17

20

23

dB

57 kHz band-pass ﬁlter

fc

centre frequency

Tamb = −40 to +85 °C

56.5

57.0

57.5

kHz

B

−3 dB bandwidth

2.5

3.0

3.5

kHz

G

stop band gain

∆f= ±7 kHz

31

−−

dB

f < 45 kHz

40

−−

dB

f < 20 kHz

50

−−

dB

f > 70 kHz

40

−−

dB

Ro(8)

output resistance (pin 8)

f = 57 kHz

−

26

−Ω

Comparator input (pin 7)

Vi(rms)

minimum input level (RMS value)

f = 57 kHz

−

110

mV

Ri

input resistance

70

110

150

k

Ω

Oscillator input (pin 13)

VIH

HIGH level input voltage

VDDD = 5.0 V

4.0

−−

V

VIL

LOW level input voltage

VDDD = 5.0 V

−−

1.0

V

II

input current

VDDD = 5.5 V

−−

±1

µA

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