MH88435-P

Preliminary Information

2-48

†

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.

Note 2: dBm is referenced to 600

Ω unless otherwise stated.

Note 3: These parameters need to be taken into consideration when designing or specifying the power supply.

11

Longitudinal to Metallic Balance

Metallic to Longitudinal Balance

46

46

60

40

65

65

68

62

dB

dB

dB

dB

Test circuit as Fig. 10

300-1000Hz

1000-3400Hz

Test circuit as Fig.11

200-1000Hz

1000-4000Hz

12

Idle Channel Noise

at 2-Wire

at VX

at 2-Wire

at VX

Nc

10

10

-80

-80

20

20

dBrnC

dBrnC

dBm

dBm

Cmess filter

300-3400Hz filter

13

Transmit Gain (2-Wire to VX)

(Terminated gain)

Off-Hook

(Voltage gain)

On-Hook

-1

0

0

+1

dB

dB

Test circuit as Fig. 7

Input 0.5V @ 1kHz

LC = 0V

14

Frequency Response Gain

(relative to Gain @ 1kHz)

-1

-1

+0.3

+0.2

+1

+1

dB

dB

300Hz

3400Hz

15

Intermodulation Distortion

products at VX and 2W

IMD

60

dB

F1 = 1kHz at -6dBm

F2 = 800Hz at -6dBm

Total signal power =

-3dBm

16

Distortion at VX due to near end

echo

(300Hz - 3400Hz bandwidth)

75

dB

F1 = 1kHz at -6dBm

F2 = 800Hz at -6dBm

Total signal power =

-3dBm

17

Common Mode Rejection on 2 wire

at VX

CMRR

56

dB

Test circuit as Fig. 10

1-100Hz. Note 4

18

Common Mode overload level

CMOL

7

Vrms

Test circuit as Fig. 10.

Note 4

Variations from Standard AC Electrical Characteristics

(MH88437AD-PI/MH88437AS-PI) (-40˚C to 0˚C)

Characteristics

Sym

Min

Typ

Max

Units

Test Conditions

1

Frequency Response Gain

-0.6

-0.65

dB

300Hz (-40˚C to 0˚C)

Characteristics

Sym

Min

Max

Units

Test Conditions