T8531A/T8532 Agere Systems, Inc., T8531A/T8532 Datasheet - Page 27

• Manufacturer Part Number: T8531A/T8532
• Description: Multichannel Programmable Codec Chip Set
• Manufacturer: Agere Systems, Inc.

May 2001
Agere Systems Inc.
Transmission Characteristics
Table 12. Gain and Dynamic Range (continued)
Transmit Gain Variation
Transmit Gain Variation
Receive Gain Absolute
Relative Gain:
Relative Phase:
Receive Gain Variation
Receive Gain Variation
Receive Gain Variation
Relative Termination
with Frequency
with Signal Level
Accuracy
VRP to VRN
VRP to VRN
with Programmed
Gain
with Frequency
with Signal Level
Impedance Gain
Parameter
Symbol
GRAG
GRAF
GXAF
GXAL
GRAL
GRA
A
—
—
T
deviation from the programmed gain relative
code, minimum gain < GR < maximum gain:
Relative to 1016 Hz, minimum gain < GX <
Relative to 1016 Hz, digital input = 0 dBm0
Measure receive gain over the range from
Receive gain programmed to 0 dB, apply
maximum to minimum setting, calculated
0 dBm0 oversampled data to OSDR0 or
maximum gain, VTX = 0 dBm0 signal,
Sinusoidal test method, reference
Sinusoidal test method reference
OSDR = –50 dBm0 to –37 dBm0
OSDR = –55 dBm0 to –50 dBm0
(continued)
OSDR = –37 dBm0 to +3 dBm0
VTX = –50 dBm0 to –37 dBm0
VTX = –55 dBm0 to –50 dBm0
VTX = –37 dBm0 to +3 dBm0
Digital input 0 dBm0 signal
Digital input 0 dBm0 signal
to GRA at 0 dB, V
RL = 100 k
OSDR1, measure VRP,
f = 4600 Hz and above
f = 4600 Hz and above
f = 300 Hz to 3000 Hz
f = 300 Hz to 3400 Hz
f = 300 Hz to 3400 Hz
path gain set to 0 dB:
f = below 3000 Hz
–40 C to +85 C
Test Conditions
level = 0 dBm0:
level = 0 dBm0:
0 dB path gain
f = 16.67 Hz
T
f = 3140 Hz
f = 3380 Hz
f = 3860 Hz
f = 3140 Hz
f = 3380 Hz
f = 3860 Hz
f = 200 Hz
0 to 85 C
f = 40 Hz
f = 50 Hz
f = 60 Hz
Z
= 600
—
differential:
DD
= 5 V
–0.125
–0.735
–0.125
–0.735
–0.57
–0.25
–0.50
–0.25
–0.30
–0.01
–0.25
–0.57
–0.25
–0.50
–1.8
–1.4
–0.1
–1.4
–0.2
Min
—
—
—
—
—
—
—
—
–0.550
–0.550
–10.7
–0.5
0.01
–9.9
Typ
–50
–38
–44
–45
0.04
0.04
0.04
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Codec Chip Set
0.125
0.125
0.015
–8.98
0.125
0.125
0.015
–8.98
Max
0.25
0.50
0.25
0.30
0.01
0.25
0.25
0.50
–30
–26
–30
–30
–32
–28
1.4
0.1
1.4
0.2
0
Unit
Deg
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
dB
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