Datasheet > MC44C402AC

MC44C402AC

更新时间： 2024-02-13 20:50:21

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		编码器
页数	文件大小	规格书
12页	371K
描述
MTS Stereo Encoder

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

MC44C402AC 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
零件包装代码：	QFP	包装说明：	LQFP, QFP32,.35SQ,32
针数：	32	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.31.00.01
风险等级：	5.11	其他特性：	IT ALSO REQUIRES 1.8V SUPPLY
商用集成电路类型：	CONSUMER CIRCUIT	JESD-30 代码：	S-PQFP-G32
JESD-609代码：	e3	长度：	7 mm
湿度敏感等级：	3	功能数量：	1
端子数量：	32	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	LQFP	封装等效代码：	QFP32,.35SQ,32
封装形状：	SQUARE	封装形式：	FLATPACK, LOW PROFILE
峰值回流温度（摄氏度）：	260	电源：	1.8,3.3 V
认证状态：	Not Qualified	座面最大高度：	1.6 mm
子类别：	Other Consumer ICs	最大供电电压 (Vsup)：	3.63 V
最小供电电压 (Vsup)：	2.97 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	0.8 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	40	宽度：	7 mm
Base Number Matches：	1

MC44C402AC 数据手册

-1

-2

-3

-4

-5

100

200

500

10k

Figure 5. Amplitude Ripple

-5

-10

-15

-20

-25

-30

-35

-40

-45

-50

14k

14.5k

15k

15.5k

16k

16.5k

17k

Figure 6. Amplitude-Notch

SYSTEM APPLICATION NOTES

4. A low pass filter is required on the CA (baseband)

output. The filter shown in Figure 7 note 1 is

recommended. It is a Bessell filter with uniform group

delay to 50 kHz and an input impedance of 500Ω and

high output impedance.

DESIGN CONSIDERATIONS

When developing application using the MC44C402 Stereo

Encoder, the user can significantly improve the performance

by following the suggestions below:

1. Disable the pre-emphasis on the modulator

5. Crystal frequency is critical. It MUST be within +/- 2 kHz

(100 PPM) under all conditions. Recommend 30 PPM

or better at room temperature. Measure the frequency,

being careful not to load the crystal oscillator pins or

alternatively the frequency can be determined by

measuring the 4 MHz using (spectrum analyzer), being

careful not to load the crystal oscillator pins, or with a

frequency counter on the 4 MHz port to +/- 400 Hz max

or 100 Hz at room temp. A symptom of the crystal being

off frequency is stereo separation changing at about a

1 Hz rate (Pulsing).

2. There must be a 4.5 MHz notch in the video because

Video spectra that fall into the 4.5 MHz range will

severely impact the audio performance. See the notch

filter shown in Figure 7.

3. Measurements must be made with a precision

demodulator followed by a precision decoder,

measuring audio performance using mono or wide band

output will give erroneous results. We suggest the setup

as described below

Equipment suggestions

Demodulator: Tektronix

TV1450

Decoder:

Modulation Sciences SRD-1

MC44C402

Freescale Semiconductor

1...3 4 567 8 9...12

下载PDF

与MC44C402AC相关器件

型号	品牌	描述	获取价格	数据表
MC44C402ACR2	FREESCALE	MTS Stereo Encoder	获取价格
MC44C404	FREESCALE	Stereo Encoder	获取价格
MC44C404_08	FREESCALE	NICAM 728 - Stereo Encoder	获取价格
MC44C404EP	FREESCALE	Stereo Encoder	获取价格
MC44C404EPR2	FREESCALE	Stereo Encoder	获取价格
MC44C800FTA	NXP	Up/Down Converter	获取价格