Preliminary Information

MH88435-P

2-47

†

Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.

‡Typical figures are at 25

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

Variations from Standard Loop Electrical Characteristics -

(MH88435AD-PI/MH88435AS-PI)

Characteristics

Sym

Min

Typ

Max

Units

Test Conditions

1

Ringing Voltage Threshold

VR

17

Vrms

-40˚C to 0˚C

2

Operating Loop Current

22

80

mA

-40˚C to 0˚C

+70˚C to +85˚C

Characteristics

Sym

Min

Max

Units

Test Conditions

1

Supply Current

7mA

2RV,

LCD

Low Level Output Voltage

High Level Output Voltage

2.4

0.4

V

V

3

LC

Low Level Input Voltage

High Level Input Voltage

Low Level Input Current

High Level Input Current

2.0

0

350

0.8

10

400

V

V

µA

µA

Characteristics

Sym

Min

Max

Units

Test Conditions

1

Input Impedance

VR-

VR+

47k

94k

Ω

Ω

2

Output Impedance at VX

10

Ω

3

Receive Gain (VR to 2-Wire)

-1

0

1

dB

Test circuit as Fig. 8

Input 0.5V at 1kHz

4

Frequency Response Gain

(relative to Gain @ 1kHz)

-0.5

-0.5

+0.4

0

+0.5

+0.5

dB

dB

300Hz

3400Hz

5

Signal Output Overload Level

at 2-Wire

at VX

0

0

dBm

dBm

THD < 5% @ 1kHz

6

Signal/Noise & Distortion

at 2-Wire

at VX

SINAD

70

70

dB

dB

Input 0.5V at 1kHz

300-3400Hz

7

Power Supply Rejection Ratio

at 2-Wire

at VX

PSRR

25

25

40

40

dB

dB

Ripple 0.1Vrms 1kHz

8

Transhybrid Loss

THL

16

25

dB

Test circuit as Fig.8

9

2-Wire Input Impedance

Zin

Note 3

Ω

@1kHz

10

Return Loss at 2-Wire

(Reference 600

Ω)

RL

14

20

18

20

24

24

dB

dB

dB

Test circuit as Fig. 9

200-500Hz

500-2500Hz

2500-3400Hz