TDA7541B datasheet(11/77 Pages) STMICROELECTRONICS

11 / 77 page

TDA7541B

Electrical specifications and characteristics

Doc ID 16048 Rev 1

11/77

3.3.2

FM section

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

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

1.10

ICCVCO

Supply current

1.11

ICCMIX1

Supply current

FM ON

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)

Item

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Table 6.

FM section

Item

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

4. Wide band RF AGC

4.1

V8-10

Lower threshold start

V13 = 2.5 V, RFK “0”

μV

4.2

V8-10

Upper threshold start

V13 = 2.5 V, RFK”0”

μV

4.3

Δ V8-10 Control range RF KAGC

KAGC”000”, RFAGC”00”,

V37 = 3.0….3.7 V, RFK”1”

5. Narrow band IF and keying AGC

5.1

V61

Lower threshold start

KAGC = off, V8-10 = 0 mVRMS

dBµV

5.2

V61

Upper threshold start

KAGC = off, V8-10 = 0 mVRMS

dBµV

5.3

V61

Max. IFAGC threshold

with KAGC

KAGC”000”,IFAGC”00”,

V37 = 3.0 V

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….3.9 V

6. AGC time constant output

6.1

V13

Max. AGC output voltage

V8-10= 0 mVRMS

VREF1

+VBE

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