KA2425B datasheet(3/6 Pages) SAMSUNG

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KA2425A

SPEECH NETWORK WITH DIALER INTERFACE

ECTRICAL CHARACTERISTICS (Continued)

Characteristic

Symbol

Test Conditions

Min

Typ

Max

Unit

SYSTEM AMPLIFIERS

Gain

TXO Bias Voltage

TXI input Resistance

GV (TX)

VBIAS (SPM)

VBIAS (TM)

VOL (SPM)

RI (TXI)

TXI to TXO

Speech/Pulse Mode

Tone Mode

Speech/Pulse Mode

0.45

VR -25

0.52

VR -5.0

125

0.60

250

xVR

Ω

RXO Bias voltage

RXO Source current

RXO High Voltage

RXO Low Voltage

VBIAS (AM)

ISOURCE (SM)

ISOURCE (PTM)

VOH (AM)

VOL (AM)

All Mode

Speech Mode

Pulse/tone Mode

All Mode

0.45

1.5

200

VR -100

0.52

2.0

400

VR -50

0.60

150

xVR

µA

SIDETONE AMPLIFIER

Gain (TXO to STA)

Speech Mode

Pulse Mode

@VLR = 0.5V

@VLR = 2.5V

@VLR = 0.2V

@VLR = 1.0V

-15

-21

-15

-21

STA Bias Voltage

VBIAS (STA)

All Modes

0.65

0.8

0.9

xVR

MICROPHONE, RECEIVER CONTROLS

MIC Saturation Voltage

VSAT (MIC)

Speech Mode,1 = 500

µA

125

MIC Leakage Current

ILKG (MIC)

Dialing Mode, Pin 1=3.0V

5.0

µA

RRMT (SM)

RRMT (DM)

Speech Mode

Dialing Mode

5.0

8.0

Ω

RMT Delay

tD (RMT)

Dialing to Speech

2.0

4.0

EQUALIZATION AMPLIFIER

GAIN (V + to EQ)

Speech Mode

Pulse Mode

GV (EQ)

@ VLR = 0.5V

@ VLR = 2.5V

@ VLR = 0.2V

@ VLR = 1.0V

-12

-2.5

-12

-2.5

EQ Bias Voltage

Speech Mode

Pulse Mode

Speech, Pulse Mode

VBIAS (EQ)

@ VLR = 0.5V

@ VLR = 2.5V

0.66

1.3

3.3

Vdc

GV (STA)

RMT Resistance

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