
Si3216
Rev. 1.0 15
Not Recommended
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Table 5. Linefeed Characteristics
(V
DDA
, V
DDD
= 3.13 to 5.25 V, T
A
= 0 to 70 °C for K-Grade, –40 to 85 °C for B-Grade)
Parameter Symbol Test Condition Min Typ Max Unit
Loop Resistance Range R
LOOP
See Note 0 — 160
DC Loop Current Accuracy I
LIM
= 29 mA, ETBA = 4 mA –10 — 10 %
DC Open Circuit Voltage
Accuracy
Active Mode; V
OC
=48V,
V
TIP
– V
RING
–4 — 4 V
DC Differential Output
Resistance
R
DO
I
LOOP
< I
LIM
—160—
DC Open Circuit Voltage—
Ground Start
V
OCTO
I
RING
<I
LIM
; V
RING
wrt ground
V
OC
=48V
–4 — 4 V
DC Output Resistance—
Ground Start
R
ROTO
I
RING
<I
LIM
; RING to ground — 160 —
DC Output Resistance—
Ground Start
R
TOTO
TIP to ground 150 — — k
Loop Closure/Ring Ground
Detect Threshold Accuracy
I
THR
= 11.43 mA –20 — 20 %
Ring Trip Threshold
Accuracy
R
THR
=1100 –20 — 20 %
Ring Trip Response Time User Programmable Register 70
and Indirect Register 23
———
Ring Amplitude V
TR
5 REN load; sine wave;
R
LOOP
=160V
BAT
= –75 V
44 — — V
rms
Ring DC Offset R
OS
Programmable in Indirect
Register 6
0——V
Trapezoidal Ring Crest
Factor Accuracy
Crest factor = 1.3 –.05 — .05
Sinusoidal Ring Crest
Factor
R
CF
1.35 — 1.45
Ringing Frequency Accuracy f = 20 Hz –1 — 1 %
Ringing Cadence Accuracy Accuracy of ON/OFF Times –50 — 50 ms
Calibration Time
CAL to CAL Bit — — 600 ms
Power Alarm Threshold
Accuracy
At Power Threshold = 300 mW –25 — 25 %
Note: DC resistance round trip; 160 corresponds to 2 kft 26 gauge AWG.
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