30

4872A–CORD–08/05

U4091BM-R

Noise at line psophometrically

weighted

AGATX[0:2] = 7

No

–73

–70

dBmp

Anti-clipping

attack time

release time

CTXA = 1 µF

each 3 dB overdrive

t

r

2

80

ms

ms

Gain at low operating current

I

V

G

T

45

48

dB

Distortion at low operating current

V

I

d

t

5%

Receiving Amplifier

ERX = ETX = ENMIC = ENSTBAL = I1O1 = I3O3 = 1, SL[0:1] = 0, LF[0:3] = 1, P[0:4] = 31, AFS[0:5] = 54, AGARX[0:2] = 0

Adjustment range of

receiving gain

Single ended,

I

EA[0:4] = 2 to 31

AGARX[0:2] = 0 to 7

G

R

–19

+17

dB

Receiving amplification

Differential

AGARX[0:2] = 0

EA[0:4] = 15

EA[0:4] = 31

G

R

–1

14.7

0

15.7

1

16.7

dB

dB

Frequency response

I

∆G

RF

–1

0

dB

Gain change with current

I

∆G

R

±0.5

dB

Gain deviation

T

∆G

R

±0.5

dB

Ear protection differential

I

EA[0:4] = 15

EP

3

MUTE suppression

(earpiece disconnect from matrix)

∆G

R

60

dB

Output voltage

d < 2% differential

I

EA[0:4] = 11

0.775

Maximum output

current d < 2%

EA[0:4] = 31

Receiving noise

psophometrically weighted

I

EA[0:4] = 15

–79

–76

dBmp

Sidetone suppression

Z = 600

Ω

20

dB

Output resistance

Each output against GND

10

Ω

Gain at low operating

current (receive only)

I

I

EA[0:4] = 21,

ENMIC = ETX = I101 = 0

–2

0

2

dB

18. Electrical Characteristics (Continued)

RLS = 50

Ω, Z

Parameters

Test Conditions

Symbol

Min.

Typ.

Max.

Unit

Note:

1. This is a period of time the bus requires from the end of a data transmission and before a new transmission can be started