SI3216-KT Silicon Laboratories Inc, SI3216-KT Datasheet - Page 30

• Manufacturer Part Number: SI3216-KT
• Description: IC SLIC/CODEC 1CH 38TSSOP
• Manufacturer: Silicon Laboratories Inc
• Series: ProSLIC®r

Specifications of SI3216-KT

• Function: Subscriber Line Interface Concept (SLIC), CODEC
• Interface: PCM, SPI
• Number Of Circuits: 1
• Voltage - Supply: 3.13 V ~ 5.25 V
• Current - Supply: 88mA
• Power (watts): 700mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: *
• Includes: Audio Tone Generation, BORSCHT Functions, FSK Generation, Ringing and Battery Voltage Generation
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Si3216
2.1.5. Power Monitoring and Line Fault Detection
In addition to reporting voltages and currents, the
ProSLIC continuously monitors the power dissipated in
each external bipolar transistor. Real time output power
of any one of the six linefeed transistors can be read by
setting the Power Monitor Pointer (direct Register 76) to
point to the desired transistor and then reading the Line
Power Output Monitor (direct Register 77).
The real time power measurements are low-pass
filtered and compared to a maximum power threshold.
Maximum power thresholds and filter time constants are
software-programmable and should be set for each
transistor pair based on the characteristics of the
transistors used. Table 24 describes the registers
associated with this function. If the power in any
external transistor exceeds the programmed threshold,
a power alarm event is triggered. The ProSLIC sets the
Power Alarm register bit, generates an interrupt (if
enabled), and automatically enters the Open state (if
AOPN = 1).
transistors from fault conditions and, combined with the
loop voltage and current monitors, allows diagnosis of
30
*Note: The ProSLIC uses registers that are both directly and indirectly mapped. A direct register is one that is mapped
Loop Voltage Sense (V
Battery Voltage Sense 1 (V
Battery Voltage Sense 2 (V
Transistor 1 Current Sense
Transistor 2 Current Sense
Transistor 3 Current Sense
Transistor 4 Current Sense
Transistor 5 Current Sense
Transistor 6 Current Sense
directly.
RING Voltage Sense
Loop Current Sense
TIP Voltage Sense
Parameter
This
Table 23. Measured Real Time Linefeed Interface Characteristics
feature
TIP
– V
BAT
BAT
protects
RING
)
)
)
the
–94.5 to +94.5 V
Measurement
–80 to +80 mA
0 to 81.35 mA
0 to 81.35 mA
0 to 80.58 mA
0 to 80.58 mA
0 to –95.88 V
0 to –95.88 V
0 to –95.88 V
0 to –95.88 V
0 to 9.59 mA
0 to 9.59 mA
Range
external
Rev. 1.0
the type of fault condition present on the line.
The value of each thermal low-pass filter pole is set
according to the following equation:
where  is the thermal time constant of the transistor
package; 4096 is the full range of the 12-bit register, and
800 is the sample rate in Hertz. Generally  = 3 seconds
for SOT223 packages and 0.16 seconds for SOT23, but
check with the manufacturer for the thermal time
constant of a specific device. For example, the power
alarm threshold and low-pass filter values for Q5 and
Q6 using an SOT223 package transistor are computed
as follows:
PPT56
Thus, indirect Register 34 should be set to 150Dh.
Note: The power monitor resolution for Q3 and Q4 is different
Resolution
from that of Q1, Q2, Q5, and Q6.
0.319 mA
0.319 mA
0.316 mA
0.316 mA
1.27 mA
0.376 V
0.376 V
0.376 V
0.376 V
37.6 µA
37.6 µA
=
1.5 V
------------------------------ -
Resolution
thermal LPF register
P
MAX
VBATS1[7:0]
VBATS2[7:0]

VRING[7:0]
VTIP[7:0]
2
Register
LCS[5:0]
LVS[6:0]
IQ1[7:0]
IQ2[7:0]
IQ3[7:0]
IQ4[7:0]
IQ5[7:0]
IQ6[7:0]
7
LCSP,
LVSP,
Bits
=
----------------- -
0.0304
1.28
=
------------------
800 

4096
2
Direct Register 78
Direct Register 79
Direct Register 80
Direct Register 81
Direct Register 82
Direct Register 83
Direct Register 86
Direct Register 87
Direct Register 84
Direct Register 85
Direct Register 88
Direct Register 89
7

=
Location*

5389
2
3
=
150Dh