MC44BC375UAEF Просмотр технического описания (PDF) - Freescale Semiconductor

Номер в каталоге

Компоненты Описание

производитель

MC44BC375UAEF

PLL Tuned VHF (Channel 3 / 4) Audio / Video Modulator

Freescale Semiconductor 

Table 8. Audio Performance Characteristics

Parameter

Test Conditions(1)

Min

Typ

Max

Unit

Type

Picture-to-Sound ratio

PSS pin = High

PSS pin = Low

14

16

18

dB

B

12

14

14

Picture to Sound ratio difference between PSS = HI and PSS = LO

1.5

2.0

2.5

dB

B

Audio modulation depth

Using specific pre-emphasis circuit, Audio input = 1.0 KHz @ 205 mVrms

Fs = 4.5 MHz

(100% modulation = ±25 KHz FM deviation)

75

85

95

%

B

Fs = 5.5 MHz

(100% modulation = ±50 KHz FM deviation)

75

85

95

%

B

Audio input resistance

45

55

61

KΩ

A

Audio Frequency response

Reference 0 dB at 1.0 KHz,

Measure from 50 Hz to 15 KHz

Depends on loop filter components

-2.5

—

+2.0

dB

C

Audio Distortion FM (THD only)

At 1.0 KHz, 100% modulation (±50 KHz) No video

—

0.3

1.0

%

C

Audio S/N with Sync Buzz FM

50

53

—

dB

C

1. See Performance Measurement Test Set-ups, Table 9.

Application Specific Products

Freescale Semiconductor

MC44BC375U

7

Share Link: