TEA7088AFP Просмотр технического описания (PDF) - STMicroelectronics

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TEA7088AFP

LOW-RANGE PHONE DEDICATED CHIP

STMicroelectronics 

TEA7088A

ELECTRICAL SPECIFICATIONS (continued)

Receive Characteristics (Tamb = 25°C ; RL = 660Ω ; f = 1kHz)

Symbol

Eff

GRXl

GRXs

Dr

Parameter

Sidetone

Eff = (Vear+ - Vear -) /Vm

Gain in Symmetric Mode

Grx = (Vear+ - Vear-) / VL

Distortion

Nr

Vear

(010010)

Zout

Noise

Earphone Mute

Output Impedance

Test Conditions

Test 3, Vm = -55dBV, IL = 22mA,

R14 = 10kΩ, R17 = 15kΩ

Test 6, VL = -14.5dBV, R14 = 10kΩ,

R17 = 15kΩ, R25 = 3.9kΩ

IL = 22mA

IL = 90mA

Test 4, Rear = 300Ω, IL = 22mA

Vear = -12dBV

Vear = -8dBV

Test 4, IL = 22mA

IL = 22mA, VL = -14.5dBV

Min.

0.7

-6

60

Typ.

1.7

-4

-76

Max. Unit

22.5 dB

2.7 dB

-2

dB

2

%

5

%

dBmp

dB

20

Ω

Automatic Gain Control Inhibition (Tamb = 25°C ; RL = 660Ω ; f = 1kHz no AGC mode selected)

Symbol

Parameter

Gtp Transmit Gain

Grp Receive Gain

Test Conditions

Test 3 & Test 4, IL = 22 to 90mA

Code : 010100

Vm = -55dBV

VL = -14.5dBV

Min. Typ. Max. Unit

Gtxl -3 Gtxl -2 Gtxl -1 dB

Grxl -3 Grxl -2 Grxl -1 dB

Ring Characteristics (Tamb = 25°C)

Symbol

VThri ON

VThri OFF

ICRing

VRMC

tRON

VRING

Vbout

Parameter

Ringing Threshold Voltage

Internal Consumption in Ring

Mode

Microprocessor Supply Voltage

Rise Time

Internal Zener Voltage

Buzzer Vout

Freq = 1312Hz

Freq. Code 001111

Test Conditions

Test 5 a/b

RI high (see Figure 4)

Rl low (see Figure 4)

VRING = 10V

IRING = 10mA

VRING = 27Vzener (see Figure 5)

Level Code (011111)

Level Code (011110)

Level Code (011101)

Level Code (011100)

Min.

15

5

3.45

27

12

4.4

2.2

1

Typ.

1

3.75

13

5.6

2.8

1.4

Max. Unit

20

V

9

V

1.2 mA

4.05 V

100 ms

V

13.5

6.7

3.4

1.8

VRMS

VRMS

VRMS

VRMS

Figure 4 : Ringer Hysteresis Ringer

ON

Figure 5 : Ringer Output Waveform

Ringer

Status

OFF

VOFF

VON

V

Ringer Threshold (VTHRI)

Vb o ut

6/17

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