AM79M574JC datasheet(6/20 Pages) ETC2

Part #	AM79M574JC

Description	Metering Subscriber Line Interface Circuit

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6

Am79M574 Data Sheet

ELECTRICAL CHARACTERISTICS

Description

Test Conditions (See Note 1)

Min

Typ

Max

Unit

Note

Analog (VTX) output impedance

3

Ω

Analog (VTX) output offset

0

°C to +70°C

–1*

–40

°C to +85°C

–1

–35

–30

–40

–35

+35

+30

+40

+35

mV

—

4

Analog (RSN) input impedance

Longitudinal impedance at A or B

300 Hz to 3.4 kHz

1

20

35

Ω

4

—

Overload level

Z2WIN = 600 Ω to 900 Ω

4-wire

2-wire

–3.1

–6.0

+3.1

+6.0

Vpk

—

2

Transmission Performance, 2-Wire Impedance

2-wire return loss

(See Test Circuit D)

300 Hz to 500 Hz

500 Hz to 2500 Hz

2500 Hz to 3400 Hz

26

20

dB

4, 14

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

RL = 600 Ω, longitudinal to

metallic L-T, L-4 (normalized to

unity gain)

300 Hz to 3400 Hz

–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

—

4

—

Longitudinal signal

generation 4-L

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 2- to 4-wire

2- to 4-wire

4- to 2-wire

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

5.75

5.65

5.75

5.70

5.85

6.00

6.05

5.95

6.00

dB

—

4

—

4

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

—

4

—

4

Variation with frequency

300 Hz to 3400 Hz

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, ref 0 dBm

0

°C to +70°C

–40

°C to +85°C

–0.1

–0.15

+0.1

+0.15

—

4

Notes:

* P.G. = Performance Grade

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

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