參數(shù)資料
型號： MC145557P
廠商： MOTOROLA INC
元件分類： 編解碼器
英文描述： PCM Codec-Filter
中文描述： A-LAW, PCM CODEC, PDIP16
封裝： PLASTIC, DIP-16
文件頁數(shù)： 8/20頁
文件大?。?/td> 342K
代理商： MC145557P
MC145554
MC145557
MC145564
MC145567
8
MOTOROLA
ANALOG TRANSMISSION PERFORMANCE
(VCC = + 5 V
±
5%, VBB = – 5 V
±
5%, GNDA = 0 V, 0 dBm0 = 1.2276 Vrms = + 4 dBm @ 600
, FSX = FSR = 8 kHz,
BCLKX = MCLKX = 2.048 MHz Synchronous Operation, VFXI – Connected to GSX, TA = – 40 to + 85
°
C Unless Otherwise Noted)
Characteristic
End–to–End
A/D
D/A
Unit
Min
Max
Min
Max
Min
Max
Absolute Gain (0 dBm0 @ 1.02 kHz, TA = 25
°
C, VCC = 5 V, VBB = – 5 V)
Absolute Gain Variation with Temperature
—
—
–
0.25
– 0.25
– 0.25
+ 0.25
dB
0
to 70
°
C
– 40
to + 85
°
C
—
—
—
—
—
—
±
0.03
±
0.06
—
—
±
0.03
±
0.06
dB
Absolute Gain Variation with Power Supply (VCC = 5 V,
±
5%,
VBB = – 5 V,
±
5%)
—
—
—
±
0.02
—
±
0.02
dB
Gain vs Level Tone (Relative to – 10 dBm0, 1.02 kHz)
+ 3 to – 40 dBm0
– 40 to – 50 dBm0
– 50 to – 55 dBm0
– 0.4
– 0.8
– 1.6
+ 0.4
+ 0.8
+ 1.6
– 0.2
– 0.4
– 0.8
+ 0.2
+ 0.4
+ 0.8
– 0.2
– 0.4
– 0.8
+ 0.2
+ 0.4
+ 0.8
dB
Gain vs Level Pseudo Noise CCITT G.712
(MC145557/67 A–Law Relative to – 10 dBm0)
– 10 to – 40 dBm0
– 40 to – 50 dBm0
– 50 to – 55 dBm0
—
—
—
—
—
—
– 0.25
– 0.30
– 0.45
+ 0.25
+ 0.30
+ 0.45
– 0.25
– 0.30
– 0.45
+ 0.25
+ 0.30
+ 0.45
dB
Total Distortion, 1.02 kHz Tone (C–Message)
+ 3 dBm0
0 to – 30 dBm0
– 40 dBm0
– 45 dBm0
– 55 dBm0
33
35
29
24
15
—
—
—
—
—
33
36
30
25
15
—
—
—
—
—
33
36
30
25
15
—
—
—
—
—
dBC
Total Distortion With Pseudo Noise CCITT G.714
(MC145557/67 A–Law)
– 3 dBm0
– 6 to – 27 dBm0
– 34 dBm0
– 40 dBm0
– 55 dBm0
27.5
35
33.1
28.2
13.2
—
—
—
—
—
28
35.5
33.5
28.5
13.5
—
—
—
—
—
28.5
36
34.2
30
15
—
—
—
—
—
dB
Idle Channel Noise (For End–End and A/D, Note 1)
(MC145554/64 Mu–Law, C–Message Weighted)
(MC145557/67 A–Law, Psophometric Weighted)
—
—
15
–
70
—
—
15
– 70
—
—
7
– 83
dBrnC0
dBm0p
Frequency Response (Relative to 1.02 kHz @ 0 dBm0)
15 Hz
50 Hz
60 Hz
200 Hz
300 to 3000 Hz
3300 Hz
3400 Hz
4000 Hz
4600 Hz
—
—
—
—
– 0.3
– 0.70
– 1.6
—
—
– 40
– 30
– 26
—
0.3
+ 0.3
0
– 28
– 60
—
—
—
– 1.0
– 0.15
– 0.35
– 0.8
—
—
– 40
– 30
– 26
– 0.4
+ 0.15
+ 0.15
0
– 14
– 32
– 0.15
– 0.15
– 0.15
– 0.15
– 0.15
– 0.35
– 0.8
—
—
0
0
0
0
+ 0.15
+ 0.15
0
– 14
– 30
dB
In–Band Spurious
(1.02 kHz @ 0 dBm0, Transmit and Receive)
300 to 3000 Hz
—
–
48
—
– 48
—
– 48
dBm0
Out–of–Band Spurious at VFRO (300 – 3400 Hz @ 0 dBm0 In)
4600 to 7600 Hz
7600 to 8400 Hz
8400 to 100,000 Hz
—
—
—
– 30
– 40
– 30
—
—
—
—
—
—
—
—
—
– 30
– 40
– 30
dB
Idle Channel Noise Selective (8 kHz, Input = GNDA, 30 Hz Bandwidth)
—
–
70
—
—
—
– 70
dBm0
Absolute Delay (1600 Hz)
—
—
—
315
—
215
μ
s
Group Delay Referenced to 1600 Hz
500 to 600 Hz
600 to 800 Hz
800 to 1000 Hz
1000 to 1600 Hz
1600 to 2600 Hz
2600 to 2800 Hz
2800 to 3000 Hz
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
220
145
75
40
75
105
155
– 40
– 40
– 40
– 30
—
—
—
—
—
—
—
90
125
175
μ
s
Crosstalk of 1020 Hz @ 0 dBm0 from A/D or D/A (Note 2)
—
—
—
– 75
—
– 75
dB
Intermodulation Distortion of Two Frequencies of Amplitudes
– 4 to – 21 dBm0 from the Range 300 to 3400 Hz
—
– 41
—
– 41
—
– 41
dB
NOTES:
1. Extrapolated from a 1020 Hz @ – 50 dBm0 distortion measurement to correct for encoder enhancement.
2. Selectively measured while the A/D is stimulated with 2667 Hz @ – 50 dBm0.
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