TDA7338D datasheet(3/12 Pages) STMICROELECTRONICS

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TDA7338

ELECTRICAL CHARACTERISTCS

Table 4.

(VCC = 9V; modulation frequency: 1KHz; de-emphasis time: T = 50µs; nominal MPX input voltage:

VMPX = 1.5VPP; m 100% (75KHz deviation, fmod = 1KHz); RIN = 40.2kΩ, ROUT = 40.2kΩ;

Tamb = 27°C; CREF = 4.7µF; unless otherwise specified)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VCC

Supply Voltage

7.5

10.2

ICC

Supply Current

VIN

MPX Input Level (peak to peak)

fm = 1KHz

1.5

VORMS

A.F. Output Voltage (mono)

pin 10 and 11VIN = 0.5VRMS

MONO;

1.5

SVRR

Supply Voltage Ripple Rejection

VRIPPLE = 200mV; f = 1KHz

VL/VR

Difference of Output Voltage

Levels

pin 10 and 11- mono

-0.8

0.8

Vo/Vi

Gain

V10/V20

8.5

9.5

10.5

Output Resistance

pin 10 and 11

Ω

DC Output Voltage

pin 10 and 11

4.2

4.5

4.8

Channel Separation

VR - VSB = -50mVDC

THD

Total Harmonic Distortion

0.02

0.3

Signal plus noise to noise ratio

f = 20Hz to 16KHz; S = 2Vrms

αM

Muting Attenuation

V7 and V8 < 0.6V

100

VDC

Mute DC Steps at pins 10, 11

Mute at pin 8

CARRIER AND HARMONIC SUPPRESSION AT THE OUTPUT

α19

Pilot Signal f = 19KHz

α38

Subcarrier f = 38KHz

α57

Subcarrier f = 57KHz

α76

Subcarrier f = 76KHz

INTERMODULATION (note 1)

α2fmod = 10KHz; fspur = 1KHz

α3fmod = 13KHz; fspur = 1KHz

TRAFFIC RADIO (note 2)

α57

Signal f = 57KHz

SCA - SUBSIDIARY COMMUNICATIONS AUTHORIZATION (note 3)

α67

Signal f = 67KHz

ACI - ADJACENT CHANNEL INTERFERENCE (note4)

α114

Signal f = 114KHz

α190

Signal f = 190KHz

MONO/ STEREO SWITCH

VINTH

Pilot Threshold Voltage

for stereo "ON"

mVRMS

VINTH

Pilot Threshold Voltage

for stereo "OFF"

mVRMS

VPI

Pilot Indicator Saturation

Voltage

I = 1mA

0.2

0.5

IPI

Pilot Indicator Leakage Current

V = 9V

µA

V19

Control Voltage for forced mono

α = < 3dB

0.8

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