6

Am79574 Data Sheet

ELECTRICAL CHARACTERISTICS

Notes:

* P.G. = Performance Grade

–2 grade performance parameters are equivalent to –1 performance parameters except where indicated.

Description

Test Conditions (See Note 1)

Min

Typ

Max

Unit

Note

3

Ω

4

0

°C to 70°C

–1*

–40

°C to +85°C

–1

–35

–30

–40

–35

+35

+30

+40

+35

mV

—

—

—

4

4

Analog (RSN) input impedance

1

20

Ω

4

Longitudinal impedance at A or B

300 Hz to 3.4 kHz

35

Overload level

4-wire

2-wire

–3.1

+3.1

Vpk

2

Transmission Performance, 2-Wire Impedance

2-wire return loss

(See Test Circuit D)

300 Hz to 500 Hz

500 Hz to 2.5 kHz

2500 Hz to 3.4 kHz

26

26

20

dB

4, 11

Longitudinal Balance (2-Wire and 4-Wire, See Test Circuit C)

Longitudinal to metallic L-T, L-4

300 Hz to 3.4 kHz

300 Hz to 3.4 kHz

–1*

48

52

dB

Longitudinal to metallic L-T, L-4

200 Hz to 1 kHz

normal polarity 0

°C to +70°C

–2*

normal polarity –40

°C to +85°C –2

reverse polarity

–2

63

58

54

—

4

—

1 kHz to 3.4 kHz

normal polarity 0

°C to +70°C

–2*

normal polarity –40

°C to +85°C –2

reverse polarity

–2

58

54

54

—

4

—

Longitudinal signal

generation 4-L

300 Hz to 800 Hz

300 Hz to 800 Hz

–1*

40

42

Longitudinal current capability

per wire

Active state

OHT state

25

18

mArms

4

Insertion Loss (2- to 4-Wire and 4- to 2-Wire, See Test Circuits A and B)

Gain accuracy

0 dBm, 1 kHz, 0

°C to +70°C

0 dBm, 1 kHz, –40

°C to +85°C

0 dBm, 1 kHz, 0

°C to +70°C

–1*

0 dBm, 1 kHz, –40

°C to +85°C –1

–0.15

–0.20

–0.1

–0.15

+0.15

+0.20

+0.1

+0.15

dB

—

4

—

4

Variation with frequency

300 Hz to 3.4 kHz

Relative to 1 kHz

0

°C to +70°C

–40

°C to +85°C

–0.1

–0.15

+0.1

+0.15

—

4

Gain tracking

+7 dBm to –55 dBm

0

°C to +70°C

–40

°C to +85°C

–0.1

–0.15

+0.1

+0.15

—

4