AS2520 datasheet(10/14 Pages) AMSCO

Part #	AS2520

Description	Telephone Speech Circuit with Loudhearing and Handsfree

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Manufacturer	AMSCO [ams AG]

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10 / 14 page

Preliminary

AS2520/21/20B/21B

Rev. 5.1

Page 10

May 1999

AC Electrical Characteristics

I

LINE = 15 mA; f = 800 Hz; recommended operating conditions unless otherwise specified.

Transmit

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

A

TX

Gain (M1/M2 to LS)

Gain (M3/M4 to LS)

HS, LH modes; LLC = A

GND

HF mode; LLC = A

GND

35

45

36.5

46.5

38

48

dB

A

MF

Gain (TI to LS)

MF mode

12

13.5

15

dB

∆A

TX/F

Variation with Frequency

f = 500 Hz to 3.4 kHz

+/- 0.8

dB

A

LLC

Gain Range, LLC

Speech mode; LLC = V

SS or VDD

-6

dB

THD

Distortion

V

LI < 0.25 VRMS

2

%

V

AGC

V

AGC

A

SCO

Soft Clip Level

Soft Clip Overdrive

HS, LH modes; V

LI =

HF mode; V

LI =

2

650

30

V

PEAK

mV

PEAK

dB

Z

IN

Input Impedance;

M1/M2 and M3/M4

15

kohm

A

AD

Attenuation Depth

30

dB

A

MUTE

Mute Attenuation

Mute activated

60

dB

V

NO

Noise Output Voltage

HS = high; T

AMB = 25°C

LE = high; HS = low; T

AMB = 25°C

-72

-62

dBmp

V

IN MAX

Input Voltage Range;

M1/M2

Differential

Single ended

+/- 1

+/- 0.5

V

PEAK

V

PEAK

Line Driver

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Units

V

IN MAX

Input Voltage Range; LI

+/- 2

V

PEAK

RL

∆Z

AC/TEMP

Return Loss

Temperature Variation

Z

RL = 1000 ohm; TAMB = 25°C

18

0.5

dB

Ω/°C

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