am79d2251 Advanced Micro Devices, am79d2251 Datasheet - Page 18

• Manufacturer Part Number: am79d2251
• Description: Dual Intelligent Subscriber Line Audio-processing Circuit Islac
• Manufacturer: Advanced Micro Devices

18
No.
13
Crosstalk between channels
TX or RX to TX
TX or RX to RX
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Item
These tests are performed with the following load impedances:
Frequency < 12 kHz – Longitudinal impedance = 500 ; metallic impedance = 300
Frequency > 12 kHz – Longitudinal impedance = 90
Not tested or partially tested in production. This parameter is guaranteed by characterization or
correlation to other tests.
This parameter is tested at 1 kHz in production. Performance at other frequencies is guaranteed by
characterization.
When the Intelligent Access voice chipset is in the anti-sat operating region, this parameter will be
degraded. The exact degradation will depend on system design.
Guaranteed by design.
Overall 1.014 kHz insertion loss error of the Intelligent Access voice chipset is guaranteed to be
0.34 dB
These SBAT, PSRR specifications are valid only when the ISLIC is used with the ISLAC, which
generates the anti-sat reference. Since the anti-sat reference depends upon the battery voltage sensed
by the VHB, VLB, and VPB pins of the ISLAC, the PSRR of the kit depends upon the amount of battery
filtering provided by CB.
Must meet at least one of these specifications.
These voltages are referred to VREF
These limits refer to the 2-wire output of an ideal ISLIC but reflect only the capabilities the ISLAC.
When relative levels (dBm0) are used, the specification holds for any setting of (AX + GX) gain from
0 to 12 dB or (AR + GR + RG) from 0 to –12 dB.
Group delay spec valid only when Channels 1–2 occupy consecutive slots in the frame. Programming
channels in non-consecutive timeslots adds 1 frame delay in the Group delay measurements.
The Group delay specification is defined as the sum of the minimum values of the group delays for
transmit and the receive paths when the B, X, R, and Z filters are disabled with null coefficients. See
Figure 15-3 for Group Delay Distortion.
These limits reflect only the capabilities of the dual ISLAC device.
0 dBm0
Condition
Am79D2251
1014 Hz
1014 Hz
Min
; metallic impedance = 135
Typ
Max
–76
–78
dBm0
Unit
Note