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參數(shù)資料
| 型號： | MT8888CP |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 信令電路 |
| 英文描述： | Integrated DTMF Transceiver with Intel Micro Interface |
| 中文描述： | TELECOM, DTMF SIGNALING CIRCUIT, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 11/25頁 |
| 文件大?。?/td> | 536K |
| 代理商： | MT8888CP |
MT8888C
Data Sheet
11
Zarlink Semiconductor Inc.
9.0 Single Tone Generation
A single tone mode is available whereby individual tones from the low group or high group can be generated. This
mode can be used for DTMF test equipment applications, acknowledgment tone generation and distortion
measurements. Refer to Control Register B description for details.
10.0 Distortion Calculations
The MT8888C is capable of producing precise tone bursts with minimal error in frequency (see Table 2). The
internal summing amplifier is followed by a first-order lowpass switched capacitor filter to minimize harmonic
components and intermodulation products. The total harmonic distortion for a
single tone
can be calculated using
Equation 1, which is the ratio of the total power of all the extraneous frequencies to the power of the fundamental
frequency expressed as a percentage.
Figure 11 - Equation 1. THD (%) For a Single Tone
The Fourier components of the tone output correspond to V
2f
.... V
nf
as measured on the output waveform. The total
harmonic distortion for a
dual tone
can be calculated using Equation 2. V
L
and V
H
correspond to the low group
amplitude and high group amplitude, respectively and V
2IMD
is the sum of all the intermodulation components. The
internal switched-capacitor filter following the D/A converter keeps distortion products down to a very low level as
shown in Figure 10.
Figure 12 - Equation 2. THD (%) For a Dual Tone
ACTIVE
INPUT
OUTPUT FREQUENCY (Hz)
%ERROR
SPECIFIED
ACTUAL
L1
L2
L3
L4
H1
H2
H3
H4
697
770
852
941
1209
1336
1477
1633
699.1
766.2
847.4
948.0
1215.9
1331.7
1471.9
1645.0
+0.30
-0.49
-0.54
+0.74
+0.57
-0.32
-0.35
+0.73
Table 2 - Actual Frequencies Versus Standard Requirements
THD (%) = 100
V
fundamental
V
22f
+ V
23f
+ V
24f
+ .... V
2nf
V
2L
+ V
2H
V
22L
+ V
23L
+ .... V
2nL
+ V
22H
+
V
23H
+ .. V
2nH
+ V
2IMD
THD (%) = 100
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT8888CS | Integrated DTMF Transceiver with Intel Micro Interface |
| MT8888CP1 | CB 5C 5#12 PIN RECP WALL |
| MT8888CN1 | ER 5C 5#16S PIN RECP WALL |
| MT8888CPR | Integrated DTMF Transceiver with Intel Micro Interface |
| MT8888CSR | Integrated DTMF Transceiver with Intel Micro Interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT8888CP1 | 制造商:Microsemi Corporation 功能描述: 制造商:Microsemi Corporation 功能描述:DTMF TXRX 3.58MHZ CMOS 5V 28PLCC - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TXRX DTMF 28PLCC 制造商:Microsemi Corporation 功能描述:IC TXRX DTMF 28PLCC |
| MT8888CPR | 制造商:Microsemi Corporation 功能描述:DTMF TXRX 3.58MHZ CMOS 5V 28PLCC - Tape and Reel |
| MT8888CPR1 | 制造商:Microsemi Corporation 功能描述:DTMF TXRX 3.58MHZ CMOS 5V 28PLCC - Tape and Reel 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TXRX DTMF 28PLCC 制造商:Microsemi Corporation 功能描述:IC TXRX DTMF 28PLCC |
| MT8888CS | 制造商:Microsemi Corporation 功能描述: |
| MT8888CS1 | 制造商:Microsemi Corporation 功能描述:DTMF TXRX 3.58MHz CMOS 5V 20-Pin SOIC Tube 制造商:Microsemi Corporation 功能描述:DTMF TXRX 3.58MHZ CMOS 5V 20SOIC - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TXRX DTMF 20SOIC 制造商:Microsemi Corporation 功能描述:IC TXRX DTMF 20SOIC |
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