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参数资料
| 型号： | IDTNW6006AS |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 22/22页 |
| 文件大小： | 0K |
| 描述： | IC CALLER ID DECODER 20-SOIC |
| 标准包装： | 37 |
| 类型： | 来电身份解码器 |
| 应用： | 传真，调制解调器，寻呼机 |
| 电压 - 电源，模拟： | 2.5 V ~ 3.8 V |
| 电压 - 电源，数字： | 2.5 V ~ 3.8 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC |
| 包装： | 管件 |
| 其它名称： | NW6006AS |
9
INDUSTRIAL TEMPERATURE RANGE
NW6006 ENHANCED TYPE II CALLER ID DECODER
WITH STUTTER DIAL TONE DETECTOR
GAIN SETTING
Ideally, the gain of the two Op Amps would be set to 0 dB. But in
real applications, the gain setting should be determined by industry
standards as well as by customer requirements. The circuit and
calculation method of gain setting is illustrated in Figs. 3 and 4. For
Hybrid connection, the single-ended solution (Fig. 4) is often selected.
Typically, the CAS sensitivity should be lower than the FSK
sensitivity in order to prevent missing the FSK signal while the CAS
signal is detected. Therefore, it is suggested to set the gain of the Op
Amp for FSK demodulation 3 dB higher than that of the Op Amp for
CAS detection.
THE DIFFERENCE BETWEEN FSK MODE 0 AND MODE1
In FSK mode 0, the FSK serial bit stream is output to the DATA pin
directly. DCLK and DR pins are unused. The microcontroller reads out
the data by the serial data interface which is implemented by software
programming. The flexibility of using software improves the immunity
to interference.
In FSK mode 1, the received byte is stored in an on-chip register.
The microcontroller supplies read pulses (DCLK) to shift the register
contents serially out of the NW6006, onto the DATA pin. The DR pin is
also used to indicate the word boundary.
VALID DT-AS EVALUATION
DT-AS output will generate false detection if being interfered by
speech. In this way, valid DT-AS pulse evaluation becomes necessary.
The evaluation defines a minimum and maximum pulse duration,
and maximum drop out time within that pulse duration. See Figure 22
for reference.
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