SI3232-G-FQ Silicon Laboratories Inc, SI3232-G-FQ Datasheet - Page 25

• Manufacturer Part Number: SI3232-G-FQ
• Description: IC SLIC PROG DUAL-CH 64TQFP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3232-G-FQ

• Function: Subscriber Line Interface Concept (SLIC)
• Interface: ISDN
• Number Of Circuits: 2
• Voltage - Supply: 3.13 V ~ 3.47 V
• Current - Supply: 28mA
• Power (watts): 280mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.4. Linefeed Calibration
An internal calibration algorithm corrects for internal and
external component errors. The calibration is initiated by
setting the CAL register bit. Upon completion of the
calibration cycle, this bit is automatically reset.
It is recommended that a calibration be executed
following system powerup. Upon release of the chip
reset, the device is in the Open state, and calibration
can be initiated. Only one calibration should be
necessary as long as the system remains powered up.
The Dual ProSLIC calibration sequence consists of
SLIC mode calibration, monitor ADC calibration, and
audio path calibration. The calibration bits that are set in
registers CALR1 and CALR2 are executed in order of
MSB to LSB for each sequential register. CALR1, bit 7
starts the calibration sequence. CALR2 calibration bits
should be set before the CALR1 is written. The reserved
bit (bit 6) of CALR1 must always be cleared to 0. The
interrupt bit, bit 7 of IRQ3, will report an error in the
calibration process. The error could include the line
becoming off-hook during the common mode balance
calibration.
During all calibrations, the calibration engine controls
VTIP and VRING to provide the correct external voltage
conditions for the calibration algorithm. The TIP and
RING leads must not be connected to ground during
any calibration.
The leakage calibrations (CALR1, bits 4–5) can be done
at regular intervals to provide optimal performance over
temperature
calibrations can be performed every hour. Invoke these
leakage calibrations, only during on-hook, by setting
Loop Voltage Sense
(V
TIP Voltage Sense
RING Voltage Sense
Loop Current Sense
Longitudinal Current
Sense
Battery Voltage Sense
*Note: I
TIP
Parameter
– V
approximately 500 µA.
LOOP
RING
and I
)
variations.
LONG
Table 14. Register and RAM Locations used for Loop Monitoring
are calculated values based on measured I
Register/RAM
The
Mnemonic
VLOOP
VRING
ILOOP
ILONG
VBAT
VTIP
TIP/RING
VLOOP[15:0]
VRING[15:0]
ILOOP[15:0]
ILONG[15:0]
VBAT[15:0]
VTIP[15:0]
RAM Bits
Register/
Preliminary Rev. 0.96
leakage
CALR1 to 0xB0. The leakage calibration takes 5 ms and
interferes with dc feed and voice transmission during its
process.
4.4.1. Common Mode Calibration
To optimize common mode (longitudinal) balance
performance, it is recommended that the user perform
the following steps when running the common-mode
calibration routine:
1. Write the Register values as shown in Table 15.
2. Set Common Mode Balance Interrupt
3. Set CALR2 = 0x01. This enables only the AC
4. Set CALR2 = 0x80. This begins the calibration
5. Wait for the CALR1 register to clear to 0x0,
6. Ensure that a common mode balance error interrupt
7. Rewrite desired register values that were changed
During all calibrations, the calibration engine controls
VTIP and VRING to provide the correct external voltage
conditions for the calibration algorithm. The TIP and
RING leads must not be connected to ground during
any calibration. Note that the channel being calibrated
must be on-hook.
These coefficient values select a 600 Ω impedance
synthesis
(IRQEN3 = 0x80)
longitudinal balance calibration routine (CALCMBAL)
process.
indicating the longitudinal balance calibration is
complete (up to 100ms).
did not occur. Retry calibration if true.
during this calibration.
64.07 V to 160.173 mA
Measurement Range
Q1
64.07 V to 160.173 V
64.07 to 160.173 V
64.07 to 160.173 V
–I
0 to 101.09 mA
0 to 101.09 mA
Q4
0 to 64.07 V
0 to 64.07 V
0 to 64.07 V
0 to 64.07 V
currents. The resulting effective resolution is
LSB Size
4.907 mV
4.907 mV
4.907 mV
4.907 mV
3.907 µA
3.907 µA
Si3232
Resolution
Effective
500 µA*
500 µA*
251 mV
628 mV
251 mV
628 mV
251 mV
628 mV
251 mV
628 mV
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