IDT821621 Datasheet, PDF (13/21 Pages) Integrated Device Technology – LONG HAUL SLIC

IDT821621
LONG HAUL SLIC
AC ELECTRICAL CHARACTERISTICS
Unless otherwise stated, test conditions are VBAT = -52 V, VCC = +5 V, R_L= 600 Ω, R_DC1 = R_DC2 = 27.17 kΩ, R_TMG = 2350 Ω, R_D = 35.4 kΩ, no
fuse resistors, C_HP = 0.22 µF, C_DC = 0.1 µF, C_CAS = 0.33 µF, D1 = 1N400x, 2-wire AC input impedance is a 600 Ω resistance synthesized by the
programming network as shown below.
VTX
R_T1 = 75 kΩ
R_T2 = 75 kΩ
C_T1 = 120 pF
RSN
R_RX = 150 kΩ
V_RX
Figure 6 Two-Wire AC Input Impedance Programming Network
Table 5 — Transmission Performance
Description
2-wire Return Loss
Analog Output VTX Impedance
Analog Output VTX Offset Voltage
Overload Level, 2-wire and 4-wire
Overload Level
THD, Total Harmonic Distortion
THD, On-hook
Test Conditions (See Figure 7)
200 Hz to 3.4 kHz
Active state
On-hook, R_LAC = 600 Ω
0 dBm
+7 dBm
0 dBm, R_LAC = 600 Ω
Min.
Typ.
Max.
Unit
Note
26
dB
3
20
Ω
-50
+50
mV
2.5
Vpk
0.77
Vrms
-64
-50
-55
-40
dB
-36
Table 6 — Longitudinal Capability
Description
Test Conditions (See Figure 8, Figure 9)
Min.
Typ.
Max.
Unit
Note
Longitudinal to metallic L-T, L-4 balance
Longitudinal Signal Generation 4-L
Longitudinal Current per pin
Longitudinal Impedance at A or B
200 Hz to 1 kHz
0 to 70 °C
-40 to +85 °C
1 kHz to 3.4 kHz
0 to 70 °C
-40 to +85 °C
200 Hz to 3.4 kHz
Active state
0 to 100 HZ
63
58
dB
58
53
40
20
27
35
mArms
25
Ω/pin
AC Electrical Characteristics
11
October 8, 2003