參數(shù)資料
型號： AM79C30AJC
廠商： ADVANCED MICRO DEVICES INC
元件分類： 數(shù)字傳輸電路
英文描述： Digital Subscriber Controller⑩ (DSC⑩) Circuit
中文描述： DATACOM, DIGITAL SLIC, PQCC44
封裝： PLASTIC, LCC-44
文件頁數(shù)： 70/101頁
文件大?。?/td> 1607K
代理商： AM79C30AJC
70
Am79C30A/32A Data Sheet
MAP Transmission Characteristics
(Am79C30A only)
The codec is designed to meet CCIIT Recommenda-
tion G.714 requirements for signal to distortion, gain
tracking, frequency response, and idle channel noise
specification as defined in Table 53. Verification of con-
formance to G.714 is by device characterization. Pro-
duction testing of individual parts includes those
parameters shown in Table 54.
Half-channel parameters are specified from AINA or
AINB input pins to a B channel for the transmit path,
and from a B channel to EAR1/EAR2 or LS1/LS2 pins
measured differentially for the receive path. These pa-
rameters are applicable for both A- or μ-law conversion.
(A-law assumes psophometric filtering, and μ-law as-
sumes c-message weighting). All parameters are spec-
ified with the GR, X, R, GX and GER filters disabled;
STG filter is enabled but programmed for infinite atten-
uation.
All values are for V
cc
=5V +5%, TA = 0–70°C, and pro-
grammable filters/gains disabled (0 dB, flat) unless oth-
erwise indicated.
Table 53.
MAP Transmission Characteristics (Am79C30A only)
Parameter
Symbol
Parameter Descriptions
Test Conditions
Preliminary
Typ
24.0
–0.25
–0.25
–0.25
–0.25
0.0
9.0
–0.25
–0.25
–0.25
–0.25
0.0
9.0
Unit
Min
Max
TXF
Transmit Frequency Response (Attenuation vs.
Frequency Relative to –10 dBm0 at 1020 Hz)—see
Figure 17
*50 Hz–60 Hz
< 300 Hz
0.3 kHz–3.0 kHz
3.0 kHz–3.4 kHz
3.4 kHz–3.6 kHz
3.6 kHz–3.9 kHz
3.9 kHz–4.0 kHz
<300 Hz
0.3 kHz–3.0 kHz
3.0 kHz–3.4 kHz
3.4 kHz–3.6 kHz
3.6 kHz–3.9 kHz
3.9 kHz–4.0 kHz
500 Hz–600 Hz
600 Hz–1000 Hz
1.0 kHz–2.6 kHz
2.6 kHz–2.8 kHz
500 Hz–600 Hz
600 Hz–1000 Hz
1.0 kHz–2.6 kHz
2.6 kHz–2.8 kHz
0 to –30 dBm0
–40 dBm0
–45 dBm0
0 to –30 dBm0
–40 dBm0
–45 dBm0
+3 to –40 dBm0
–40 to –50 dBm0
–50 to –55 dBm0
+3 to –40 dBm0
–40 to –50 dBm0
–50 to –55 dBm0
GX = 0 dB, GA = 0 dB
GX = 6 dB, GA = 0 dB
GX = 6 dB, GA = 6 dB
GX = 6 dB, GA = 12 dB
GX = 6 dB, GA = 18 dB
GR = 0 dB, GER = 0 dB
GR = –12 dB, GER = 0 dB
+0.25
+0.9
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
μs
μs
μs
μs
μs
μs
μs
μs
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
RXF
Receive Frequency Response (Attentuation vs.
Frequency Relative to –10 dBm0 at 1020 Hz)—see
Figure 21
+0.25
+0.9
TXD
Transmit Group Delay Variation vs. Frequency at
–10 dBm0 Relative to Minimum Delay Frequency—
see Figure 18
750
380
130
750
750
380
130
750
RXD
Receive Group Delay Variation vs. Frequency at
–10 dBm0 Relative to Minimum Delay Frequency—
see Figure 22
TXSTD
Transmit Signal/Total Distortion vs. Level; CCITT
Method 2, 1020 Hz (Transmit Gain = 0dB)—See
Figure 20
Receive Signal/Total Distortion vs. Level; CCITT
Method 2, 1020 Hz (Transmit Gain = 0dB)—See
Figure 24
35.0
29.0
24.0
35.0
29.0
24.0
–0.3
–0.6
–1.6
–0.3
–0.6
–1.6
RXSTD
TXGT
Transmit Gain Tracking vs. Level; CCITT Method 2,
1020 Hz (Transmit Gain = 0 dB)—See Figure 19
+0.3
+0.6
+1.6
+0.3
+0.6
+1.6
–78
–75
–72
–69
–66
–85
–75
RXGT
Receive Gain Tracking vs. Level; CCITT Method 2,
1020 Hz (Receive Gain = 0 dB)—See Figure 23
TXICN
Transmit Idle channel Noize AINA or AINB
Connected to AREF
–82
–79
–76
–73
–70
–90
–80
dBm0
dBm0
dBm0
dBm0
dBm0
dBm0
dBm0
RXICN
Receive Idle channel Noise
Note:
*Measured with the high pass filter and auto-zero enabled in MMR2.
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