ELECTRICAL CHARACTERISTICS (continued)

FM Audio Amplifier

Ref: FM Test circuit, measure:

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Mute Voltage

29dB, FMHIGH set to 0, AUM2-0

set to 111

2V

Play Voltage

1dB, FMHIGH set to 0, AUM2-0

set to 111

0.3

V

Audio Amplifier Gain in Play

Conditions

9dB

Mute Condition

set to 1, AUM2-0 set to 001

6.5

dB

Audio Amplifier Lowest Gain in

Mute Condition

set to 0, AUM2-0 set to 111

-21

dB

AF Output Level

350

(1)

400

450

(1)

THD

AFTotal Harmonic distortion

0.5

%

S+N/N

AF Signal to Noise Ratio

68

(1)

75

%

AMR

Amplitude Modulation Rejection

1KHz, with respect to FM

60

(1)

67

dB

Audio Out Current Capability

5

mA

Mute Drive Output Resistance

1

K

Ω

NOTE1: Refer to Global application circuit; input at first Ceramic Filter in, FBH3-0 set to 0001, FBL3-0 set to 0001

FM QUALITY DETECTORS

Field Strength Detector

Ref: FM Test Circuit, measure:

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Field Strenght Detector Minimum

Threshold

to 0000

40

dBu

Field Strenght Detector Maximum

to 1111

60

dBu

TDA7421

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