29

4872A–CORD–08/05

U4091BM-R

16. Absolute Maximum Ratings

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating

only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this

specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Parameters

Symbol

Value

Unit

Line current

I

L

140

mA

DC line voltage

V

L

12

V

Maximum input current

I

RING

15

mA

Junction temperature

T

j

125

°C

Ambient temperature

T

amb

–25 to +75

°C

Storage temperature

T

stg

–55 to +150

°C

Total power dissipation, T

P

tot

0.9

W

17. Thermal Resistance

Parameters

Symbol

Value

Unit

Junction ambient SSO44

70

K/W

18. Electrical Characteristics

f = 1 kHz, 0 dBm = 775 mV

RLS = 50

Ω, Z

Parameters

Test Conditions

Symbol

Min.

Typ.

Max.

Unit

DC Characteristics

DC voltage drop over circuit

I

4.4

8.6

1.6

4.8

7.2

9.2

5.2

9.8

V

V

V

V

ERX = ETX = ENMIC = ENSTBAL = I1O1 = I3O3 = 1, (G

Transmit amplification

MICG[0:1] = 2

AGATX[0:2] = 7

45.3

46.5

47.7

dB

Frequency response

due to internal filters

f = 1 kHz to 3.4 kHz

∆G

T

–1

0

dB

Gain change with current

∆G

T

±0.5

dB

Gain deviation

∆G

T

±0.5

dB

CMRR of microphone amplifier

CMRR

60

80

dB

Input resistance of MIC amplifier

50

k

Ω

Input resistance of MIC3 amplifier

MICHF = 1

75

150

300

k

Ω

Gain difference

between MIC1/MIC2 to MIC3

MICHF = 1

∆G

T

±0.4

dB

Distortion at line

I

d

t

2%

Maximum output voltage

I

CTXA = 1 µF, DBM5 = 0

V

Lmax

1.8

3.0

4.2

dBm

DBM5 = 1

4.8

6.0

6.6

dBm

–4.2

dBm

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