Si3210/Si3211/Si3212
Table 4. Linefeed Characteristics
(V
, V
= 3.13 to 5.25 V, T = 0 to 70°C for K-Grade, –40 to 85°C for B-Grade)
DDA
DDD A
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Loop Resistance Range
R
See note.*
0
—
—
—
160
10
4
Ω
%
V
LOOP
DC Loop Current Accuracy
I
= 29 mA, ETBA = 4 mA
–10
–4
LIM
DC Open Circuit Voltage
Accuracy
Active Mode; V
= 48 V,
OC
V
– V
TIP
RING
DC Differential Output
Resistance
R
I
< I
LIM
—
–4
160
—
—
4
Ω
V
DO
LOOP
DC Open Circuit Voltage—
Ground Start
V
R
I
<I ; V
wrt ground
RING
= 48 V
OCTO
ROTO
RING LIM
V
OC
DC Output Resistance—
Ground Start
I
<I ; RING to ground
—
160
—
—
Ω
RING LIM
DC Output Resistance—
Ground Start
R
TIP to ground
= 11.43 mA
150
–20
–20
—
—
kΩ
%
%
TOTO
Loop Closure/Ring Ground
Detect Threshold Accuracy
I
—
20
20
—
THR
Ring Trip Threshold
Accuracy
R
= 1100 Ω
—
THR
Ring Trip Response Time
User Programmable Register 70
and Indirect Register 36
—
Ring Amplitude
V
R
5 REN load; sine wave;
44
—
—
V
RMS
TR
R
= 160 Ω, V
= –75 V
LOOP
BAT
Ring DC Offset
Programmable in Indirect
Register 19
0
—
—
V
OS
Trapezoidal Ring Crest
Factor Accuracy
Crest factor = 1.3
–.05
1.35
—
.05
1.45
Sinusoidal Ring Crest
Factor
R
—
CF
Ringing Frequency Accuracy
Ringing Cadence Accuracy
Calibration Time
f = 20 Hz
–1
–50
—
—
—
—
—
1
%
Accuracy of ON/OFF Times
↑CAL to ↓CAL Bit
50
msec
msec
%
600
25
Power Alarm Threshold
Accuracy
At Power Threshold = 300 mW
–25
*Note: DC resistance round trip; 160 Ω corresponds to 2 kft 26 gauge AWG.
Preliminary Rev. 1.11
11
ETC [ ETC ]
