HC5523IP datasheet(15/18 Pages) INTERSIL

15 / 18 page

r = -20

• log (2VM/VS)

where: ZD = The desired impedance; e.g., the characteristic

impedance of the line, nominally 600

Ω. (Reference Figure 6).

12. Overload Level (4-Wire port) - The overload level is speciﬁed

at the 4-wire transmit port (VTXO) with the signal source (EG)at

the 2-wire port, IDCMET = 23mA, ZL = 20kΩ,RSG =4kΩ (Refer-

ence Figure 7). Increase the amplitude of EG until 1% THD is

measured at VTXO. Note that the gain from the 2-wire port to

the 4-wire port is equal to 1.

13. Output Offset Voltage - The output offset voltage is speciﬁed

with the following conditions: EG =0,IDCMET = 23mA, ZL = ∞

and is measured at VTX.EG,IDCMET,VTX and ZL are deﬁned

in Figure 7. Note: IDCMET is established with a series 600Ω

resistor between tip and ring.

14. Two-Wire to Four-Wire (Metallic to VTX) Voltage Gain - The

2-wire to 4-wire (metallic to VTX) voltage gain is computed

using the following equation.

G2-4 =(VTX/VTR), EG = 0dBm0, VTX,VTR, and EG are deﬁned

in Figure 7.

15. Current Gain RSN to Metallic - The current gain RSN to

Metallic is computed using the following equation:

K=IM [(RDC1 +RDC2)/(VRDC -VRSN)] K, IM,RDC1,RDC2,VRDC

and VRSN are deﬁned in Figure 8.

16. Two-Wire to Four-Wire Frequency Response - The 2-wire to

4-wire frequency response is measured with respect to

EG = 0dBm at 1.0kHz, ERX =0V, IDCMET = 23mA. The fre-

quency response is computed using the following equation:

F2-4 =20 • log (VTX/VTR), vary frequency from 300Hz to

3.4kHz and compare to 1kHz reading.

VTX, VTR, and EG are deﬁned in Figure 9.

17. Four-Wire to Two-Wire Frequency Response - The 4-wire to

2-wire frequency response is measured with respect to ERX =

0dBm at 1.0kHz, EG =0V, IDCMET = 23mA. The frequency

response is computed using the following equation:

F4-2 =20 • log (VTR/ERX), vary frequency from 300Hz to

3.4kHz and compare to 1kHz reading.

VTR and ERX are deﬁned in Figure 9.

18. Four-Wire to Four-Wire Frequency Response - The

4-wire

to 4-wire frequency response is measured with respect to ERX

= 0dBm at 1.0kHz, EG =0V, IDCMET = 23mA. The frequency

response is computed using the following equation:

F4-4 =20 • log (VTX/ERX), vary frequency from 300Hz to

3.4kHz and compare to 1kHz reading.

VTX and ERX are deﬁned in Figure 9.

19. Two-Wire to Four-Wire Insertion Loss - The 2-wire to 4-wire

insertion loss is measured with respect to EG = 0dBm at 1.0kHz

input signal, ERX =0,IDCMET = 23mA and is computed using

the following equation:

L2-4 = 20 • log (VTX/VTR)

where: VTX,VTR, and EG are deﬁned in Figure 9. (Note: The

fuse resistors, RF, impact the insertion loss. The speciﬁed

insertion loss is for RF = 0).

20. Four-Wire to Two-Wire Insertion Loss - The 4-wire to 2-wire

insertion loss is measured based upon ERX = 0dBm, 1.0kHz

input signal, EG =0,IDCMET = 23mA and is computed using

the following equation:

L4-2 = 20 • log (VTR/ERX)

where: VTR and ERX are deﬁned in Figure 9.

21. Two-Wire to Four-Wire Gain Tracking - The 2-wire to 4-wire

gain tracking is referenced to measurements taken for EG =

-10dBm, 1.0kHz signal, ERX =0,IDCMET = 23mA and is com-

puted using the following equation.

G2-4 =20 • log (VTX/VTR) vary amplitude -40dBm to +3dBm, or

-55dBm to -40dBm and compare to -10dBm reading.

VTX and VTR are deﬁned in Figure 9.

22. Four-Wire to Two-Wire Gain Tracking - The 4-wire to 2-wire

gain tracking is referenced to measurements taken for ERX =

-10dBm, 1.0kHz signal, EG =0,IDCMET = 23mA and is com-

puted using the following equation:

G4-2 =20 • log (VTR/ERX) vary amplitude -40dBm to +3dBm,

or -55dBm to -40dBm and compare to -10dBm reading.

VTR and ERX are defined in Figure 9. The level is specified at the

4-wire receive port and referenced to a 600

Ω impedance level.

23. Two-Wire Idle Channel Noise - The 2-wire idle channel noise

at VTR is speciﬁed with the 2-wire port terminated in 600Ω (RL)

and with the 4-wire receive port grounded (Reference Figure

10).

24. Four-Wire Idle Channel Noise - The 4-wire idle channel noise

at VTX is speciﬁed with the 2-wire port terminated in 600Ω (RL).

The noise specification is with respect to a 600

Ω impedance

level at VTX. The 4-wire receive port is grounded (Reference

Figure 10).

25. Harmonic Distortion (2-Wire to 4-Wire) - The harmonic dis-

tortion is measured with the following conditions. EG = 0dBm at

1kHz, IDCMET = 23mA. Measurement taken at VTX. (Reference

Figure 7).

26. Harmonic Distortion (4-Wire to 2-Wire) - The harmonic dis-

tortion is measured with the following conditions. ERX = 0dBm0.

Vary frequency between 300Hz and 3.4kHz, IDCMET = 23mA.

Measurement taken at VTR. (Reference Figure 9).

27. Constant Loop Current - The constant loop current is calcu-

lated using the following equation:

IL = 2500 / (RDC1 + RDC2)

28. Standby State Loop Current - The standby state loop current

is calculated using the following equation:

IL = [|VBAT| - 3] / [RL +1800], TA = 25

29. Ground Key Detector - (TRIGGER) Increase the input current

to 8mA and verify that DET goes low.

(RESET) Decrease the input current from 17mA to 3mA and verify

that DET goes high.

(Hysteresis) Compare difference between trigger and reset.

30. Power Supply Rejection Ratio - Inject a 100mVRMS signal

(50Hz to 4kHz) on VBAT,VCC and VEE supplies. PSRR is com-

puted using the following equation:

PSRR = 20

• log (VTX/VIN). VTX and VIN are defined in Figure 12.

HC5523

HC5523IP Datasheet(PDF) 15 Page - Intersil Corporation

HC5523IP Datasheet(HTML) 15 Page - Intersil Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Datasheet Download

Link URL