AM79C32A Advanced Micro Devices, AM79C32A Datasheet - Page 70

• Manufacturer Part Number: AM79C32A
• Description: Digital Subscriber Controller (DSC) Circuit
• Manufacturer: Advanced Micro Devices

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 par ts 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,
70
Note:
*Measured with the high pass filter and auto-zero enabled in MMR2.
Parameter
Symbol
RXSTD
TXSTD
RXICN
TXICN
RXGT
TXGT
RXD
RXF
TXD
TXF
Parameter Descriptions
Transmit Frequency Response (Attenuation vs.
Frequency Relative to –10 dBm0 at 1020 Hz)—see
Figure 17
Receive Frequency Response (Attentuation vs.
Frequency Relative to –10 dBm0 at 1020 Hz)—see
Figure 21
Transmit Group Delay Variation vs. Frequency at
–10 dBm0 Relative to Minimum Delay Frequency—
see Figure 18
Receive Group Delay Variation vs. Frequency at
–10 dBm0 Relative to Minimum Delay Frequency—
see Figure 22
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
Transmit Gain Tracking vs. Level; CCITT Method 2,
1020 Hz (Transmit Gain = 0 dB)—See Figure 19
Receive Gain Tracking vs. Level; CCITT Method 2,
1020 Hz (Receive Gain = 0 dB)—See Figure 23
Transmit Idle channel Noize AINA or AINB
Connected to AREF
Receive Idle channel Noise
Table 53. MAP Transmission Characteristics (Am79C30A only)
Am79C30A/32A Data Sheet
Test Conditions
*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
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
grammable filters/gains disabled (0 dB, flat) unless oth-
erwise indicated.
cc
=5V +5%, TA = 0–70°C, and pro-
–0.25
–0.25
–0.25
–0.25
–0.25
–0.25
–0.25
–0.25
24.0
35.0
29.0
24.0
35.0
29.0
24.0
–0.3
–0.6
–1.6
–0.3
–0.6
–1.6
Min
0.0
9.0
0.0
9.0
Preliminary
Typ
–82
–79
–76
–73
–70
–90
–80
+0.25
+0.25
Max
+0.9
+0.9
+0.3
+0.6
+1.6
+0.3
+0.6
+1.6
750
380
130
750
750
380
130
750
–78
–75
–72
–69
–66
–85
–75
dBm0
dBm0
dBm0
dBm0
dBm0
dBm0
dBm0
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
µs
µs
µs
µs
µs
µs
µs
µs