MH88422-3 データシートの表示（PDF） - Mitel Networks

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MH88422-3

Data Access Arrangement

Mitel Networks 

Preliminary Information

MH88422

AC Electrical Characteristics † - MH88422 All Variants

Characteristics

Sym Min Typ‡ Max

1 Input Impedance VR

47k

2 Output Impedance at VX

10

3 Receive Gain (VR to 2-Wire)

2.5 3.5 4.6

4 Frequency Response Gain

(relative to Gain @ 1kHz)

Units

Ω

Ω

dB

Test Conditions

Test circuit as Fig 6

Input 0.5V at 1kHz

All Variants

-1

0

+1

-1

0

+1

5 Signal Output Overload Level

at 2-Wire

at Vx

+2.0 +3.0

+2.0 +3.0

6 Total Harmonic Distortion

THD

BD-1 Variant at 2-Wire

All other Variants at 2-Wire

All Variants

at VX

1.2 2.0

1.2 2.5

1.2 2.0

7 Power Supply Rejection Ratio

PSRR

BD-1 Variant at 2-Wire

18 40

at VX

18 40

dB

dB

dBm

dBm

%

%

%

dB

dB

300Hz

3400Hz

THD < 5% @ 1kHz

ILoop = 20 to 40mA

Input -3.5dBm at 1kHz

Ripple 0.1Vrms 1kHz

on VDD

All other Variants at 2-Wire

12 20

dB

at VX

12 20

dB

8 Transhybrid Loss

THL

6

20

dB Test circuit as Fig 6

Input -3.5dBm,

300-3400Hz at VR

† 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 600Ω unless otherwise stated.

2-19

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