TDA7541 datasheet(11/76 Pages) STMICROELECTRONICS

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TDA7541

Electrical specifications and characteristics

11/76

1.12

ICCMIX1

Supply Current

AM ON

1.13

ICCIF

Supply Current

2. Reference voltages

2.1

VREF1

Internal reference voltage

IREF1 = 0mA

4.855.2

2.2

VREF2

Internal reference voltage

IREF2 = 0mA

2.4

2.5

2.6

3. I2C bus interface

3.1

fSCL

Clock frequency

400

kHz

3.2

VIL

Input low voltage

3.3

VIH

Input high voltage

3.4

IIN

Input current

-5

µA

3.5

Output acknowledge voltage

IO = 1.6mA

0.4

Table 5.

Globals (continued)

(Tamb = 25°C, VCC1 = VCC2 = VCCMIX1 = VCCVCO = VCCIF = 8.5V, fXtal = 10.25 MHz,

in application circuit, unless otherwise specified)

Item

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Table 6.

FM section

(Tamb = 25°C, VCC1 = VCC2 = VCCMIX1 = VCCVCO = VCCIF = 8.5V, fXtal = 10.25 MHz,

fRF = 98MHz, dev = 40 kHz, fMod = 1 kHz, in application circuit, unless otherwise specified)

Item

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

4. Wide band RF AGC

4.1

V8-10

Lower threshold start

V13 = 2.5V,RFK “0”

μV

4.2

V8-10

Upper threshold start

V13 = 2.5V,RFK”0”

μV

4.3

Δ V8-10 Control range RF KAGC

KAGC”000”,RFAGC”00”,

V37 = 3.0….3.7V, RFK”1”

5. Narrow band IF & keying AGC

5.1

V61

Lower threshold start

KAGC = off, V8-10 = 0mVRMS

dBµV

5.2

V61

Upper threshold start

KAGC = off, V8-10 = 0mVRMS

dBµV

5.3

V61

Max. IFAGC threshold

with KAGC

KAGC”000”,IFAGC”00”,

V37 = 3.0V

dBµV

5.4

V37

Start point KAGC

KAGC”000”,IFAGC”00”,

3.2

3.4

3.6

5.5

Δ V61

Control range IF KAGC

KAGC”000”,IFAGC”00”,

V37 = 3.2….3.9V

6. AGC time constant output

6.1

V13

Max. AGC output voltage

V8-10= 0mVRMS

VREF1

+VBE

6.2

V13

Min. AGC output voltage

V8-10 = 100mVRMS

0.5

6.3

I13

Min. AGC charge current

V8-10= 0mVRMS,V13 = 2.5V

-33

-25

-17.5

µA

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