TDA7331 查看數據表（PDF） - STMicroelectronics

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TDA7331

SINGLE CHIP RDS DEMODULATOR + FILTER

STMicroelectronics 

TDA7331

THERMAL DATA

Symbol

Rth j-amb

Description

Thermal Resistance Junction-Ambient

DIP20

Max

100

SO20

200

ELECTRICAL CHARACTERISTICS (Tamb = 25°C, VS = 5V, unless otherwise specified).

Unit

°C/W

Symbol

VS

IS

Parameter

Supply voltage

Supply current

Test Condition

FILTER

fC

BW

G

A

RI

RL

S/N

VIN

VREF

Center frequency

3dB Bandwidth

Gain

Attenuation

Input impedance of MPX

Load impedance on FILOUT

Signal to noise ratio

MPX input signal

Reference

f = 57kHz

∆f ± 4kHz

f = 38kHz

f = 67kHz

VIN = 3mVRMS

f = 19kHz; T3 ≤ 40dB(1)

f = 57kHz (RDS+ ARI)

DEMODULATOR

Input pins (EXTRES, FSEL, TM)

Input pin (OSEL)

IPD

Input Current

IPU

Input Current

VIH

Input voltage high

VIN = 5V (pull-down input)

VIN = 0V (pull-up input)

VIL

Input voltage low

Output pins (RDCL, RDDA, ARI, QUAL, T57)

VOH

Ouput voltage high

VOL

Output voltage low

IL = 0.5mA

IL = 0.5mA

OSCILLATOR

VCLL Input level OSCIN pin

VCLH Input level OSCIN pin

Amplitude OSCOUT

VPP

Amplitude OSCIN

(for external drive)

OSEL = open circuit

OSEL = open circuit

OSEL = open circuit

OSEL = GND,

f = 4.332MHz

OSEL = GND,

f = 8.664MHz

OSEL = GND,

f = 17.328MHz

Min. Typ. Max. Unit

4.5

5

5.5

V

7.5 11.0 mA

56.5 57 57.5 kHz

2.5

3

3.5 kHz

18

20

22

dB

18

22

dB

50

60

dB

35

45

dB

80

120 150

KΩ

1

MΩ

30

40

dB

VS/2

1000

50

mVRMS

mVRMS

V

all with internal pull down resistor

with internal pull up resistor

15

30

µA

-25

-10

µA

0.7 ⋅ VS 0.8 ⋅ VS

V

0.2 ⋅ VS 0.3 ⋅ VS V

4

4.6

V

0.4

1

V

1

V

4

V

4.5

V

100

mVpp

120

mVpp

150

mVpp

(1) The 3rd harmonic (57kHz) must be less than -40dB with respect to the input signal plus gain.

3/7

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