Preliminary Information

MH88422

2-21

†

AC Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.

‡Typical figures are at 25

°C with nominal +5V and are for design aid only.

Note 1: All of the above test conditions use a test source impedance which matches the device’s impedance.

†

AC Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.

‡Typical figures are at 25

°C with nominal +5V and are for design aid only.

Note 1: All of the above test conditions use a test source impedance which matches the device’s impedance.

Characteristics

Sym

Min

Max

Units

Test Conditions

1

Return Loss at 2-Wire

(370

Ω + 620Ω // 310nF)

RL

16

20

dB

Test circuit as Fig 7

200-4000Hz

2

Longitudinal to Metallic Balance

50

60

dB

Test circuit as Fig 8

300-3400Hz

3

Idle Channel Noise

at 2-Wire

at VX

Nc

-80

-80

-70

-68

dBmp

dBmp

4

Transmit Gain (2-Wire to Vx)

-1.4

-0.4

0.9

dB

Test circuit as Fig 5

Input 0.5V @ 1kHz

Off-Hook

5

Frequency Gain

(relative to gain @ 1kHz)

-1.6

-2.1

-1.3

-0.5

0.4

0.9

dB

dB

300Hz

3400Hz

Characteristics

Sym

Min

Max

Units

Test Conditions

1

Return Loss at 2-Wire

(220

Ω + 820Ω // 115nF)

RL

16

22

dB

Test circuit as Fig 7

300-3400Hz

Ref ZV5 Sec 2.5.2 and

2.8.3

2

Longitudinal to Metallic Balance

30

40

46

65

60

60

dB

dB

dB

Test circuit as Fig 8

50-300Hz

300-600Hz

600-4000Hz

Ref ZV5 Sec 2.8.2

3

Idle Channel Noise

at 2-Wire

at VX

Nc

-84

-75

-70

-70

dBmp

dBmp

4

Transmit Gain (2-Wire to Vx)

-1.4

-0.4

0.9

dB

Test circuit as Fig 5

Input 0.5V @ 1kHz

Off-Hook

5

Frequency Gain

(relative to gain @ 1kHz)

-1.6

-1.2

-1.3

-0.5

-0.4

0

dB

dB

300Hz

3400Hz