32

4872A–CORD–08/05

U4091BM-R

Mute suppression

V

I4O2 = 0

VSAO

–56

dBm

Gain change with current

∆G

SA

1dB

Gain change with frequency

f = 1 kHz to 3.4 kHz

∆G

SA

–1

0

dB

Attack time of anti-clipping

20 dB overdrive

t

r

2ms

Release time of anti-clipping

t

f

170

ms

Adjustment step of charge current

ENSAO = 0, SE = 1

DLSCUR[0:1] = 1

–480

–400

–320

µA

Adjustment step of

discharge current

ENSAO = 0, SE = 0

DLSCUR[0:1] = 1

320

400

480

µA

Charge current

Pin SAO2

ENSAO = 0, SE = 1

LSCUR[0:1] = 3

I

CHA

–1.45

–1.2

–0.95

mA

Discharge current pin SAO2

ENSAO = 0, SE = 0

LSCUR[0:1] = 3

0.95

1.2

1.45

mA

Microphone Amplifier,

Gain MIC amp.:

MIC1/2

→AMREC

MICG[0:1] = 0

17.4

18.1

18.8

dB

MICG[0:1] = 1

23.2

23.7

24.6

dB

MICG[0:1] = 2

29.1

29.8

30.5

dB

MICG[0:1] = 3

35.0

35.7

36.4

dB

MIC3 to AMREC

MICHF = 1, MICG[0:1] = 3

35.0

35.7

36.5

dB

Input suppression:

MIC3 to MIC1/2

MICG[0:1] = 0, MICHF = 0

60

dB

MIC1/2 to MIC3

MICHF = 1

60

dB

Settling time offset cancellers

5

τ , FOFFC = 0

9

12

ms

Settling time offset cancellers in

speed-up mode

5

τ , FOFFC = 1

1.8

2.4

ms

AGC for Answering Machine, AMPB to AMREC,

ENAM = ENAGC = I4O5 = I5O4 = 1

Nominal gain

23.5

25.5

27.5

dB

Maximum output level

240

300

360

mVp

Attack time

20 dB overdrive

1

ms

Release time

45

ms

Switching Matrix,

VL = 0, VB = 5V, ENAM = I4O4 = 1, V

Input impedance AMPB

50

60

70

k

Ω

Gain AMPB to AMREC

–0.7

–0.3

+0.1

dB

Maximum input level AMPB

I4O5 = I5O4 = 1, I4O4 = 0

600

mV

Maximum output level AMREC

I4O4 = 1

VB –

600 mV

V

PP

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