SI3215-FT Silicon Laboratories Inc, SI3215-FT Datasheet - Page 25

• Manufacturer Part Number: SI3215-FT
• Description: IC SLIC/CODEC 1CH 38TSSOP
• Manufacturer: Silicon Laboratories Inc
• Series: ProSLIC®r

Specifications of SI3215-FT

• 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, Voice Loopback Test Modes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.2.4. Loop Voltage and Current Monitoring
The ProSLIC continuously monitors the TIP and RING
voltages and external BJT currents. These values are
available in registers 78–89. Table 22 lists the values
that are measured and their associated registers. An
internal A/D converter samples the measured voltages
and currents from the analog sense circuitry and
translates them into the digital domain. The A/D updates
the samples at an 800 Hz rate.
TIP or
Figure 15. Simplified ProSLIC Linefeed Architecture for TIP and RING Leads (One Shown)
RING
C
R
AC
AC
Control
AC Sense
AC
Control
Loop
AC
Codec
Audio
A/D
D/A
R
Si3201
BP
DSP
Q
Q
N
P
Rev. 0.92
Σ
R
E
Q
DN
Two derived values are also reported: loop voltage and
loop current. The loop voltage, V
as a 1-bit sign, 6-bit magnitude format. For ground start
operation, the reported value is the RING voltage. The
loop current, (I
bit sign, 6-bit magnitude format. In RING open and TIP
open states, the loop current is reported as (I
(I
Q5
–I
Q6
Monitor A/D
).
SLIC DAC
Control
A/D
D/A
Loop
DC
Q1
– I
DC Sense
Q2
Control
R
DC
DC
+ I
Q5
–I
R
Q6
SE
TIP
Emitter Sense
Battery Sense
)/2, is reported in a 1-
– V
RING
R
Si3215
BAT
V
, is reported
BAT
Q1
– I
Q2
) +
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