TDA7540B datasheet(12/75 Pages) STMICROELECTRONICS

12 / 75 page

Electrical specifications

TDA7540B

12/75

13.16

ROUT

Output resistance

Ω

Multipath Channel Gain

13.17

Gmin

Gain minimum

MPG=0

13.18

Gmax

Gain maximum

MPG=1

Multipath Bandpass Filter

13.19 fBP19

Centre frequency

MPF=0

kHz

13.20 fBP31

Centre frequency

MPF=1

kHz

13.21 Q

Quality factor

Multipath Output

13.22

V24

Output voltage low

0.1

13.23

V24

Output voltage high

4.9

13.24

ROUT

Output resistance

2.5

Ω

ISS (intelligent Selectivity System)

Filter 450kHz

14.1

fcentre

Centre frequency

fREF_intern = 450kHz

450

kHz

14.2

BW 3dB

Bandwidth, -3dB

ISS80 = 1

kHz

14.3

BW 20dB Bandwidth, -20dB

ISS80 = 1

150

kHz

14.4

BW 3dB

Bandwidth, -3dB

ISS80 = 0

120

kHz

14.5

BW 20dB Bandwidth, -20dB

ISS80 = 0

250

kHz

14.6

BW 3dB

Bandwidth weather band

ISS30 = 1

kHz

14.7

BW 20dB -20dB weather band

ISS30 = 1

kHz

Adjacent Channel ISS Filter Threshold

14.8

VNTH

Internal low threshold

ACNTH

14.9

VNTH

Internal high threshold

ACNTH

0.3

14.10

VWTH

Internal low threshold

ACWTH

0.25

14.11

VWTH

Internal high threshold

ACWTH

0.95

Multipath Threshold

14.12

VTHMP

Internal low threshold

MPTH

0.50

14.13

VTHMP

Internal high threshold

MPTH

1.25

ISS Filter Time Constant

14.14

I27,I28

Charge current low mid

TISS, ISSCTL = 1

-74

µA

14.15

I27,I28

Charge current high mid

TISS, ISSCTL = 1

-60

µA

14.16

I27,I28

Charge current low narrow TISS, ISSCTL = 1

-124

µA

Table 5.

Electrical characteristics (continued)

(Tamb = 25°C, VCC1 = VCC2 = VCC3 = VCCST= VCCVCO = VCCMIX1 = VCCMIX2 = VCCIF1 = 8.5V,

fRF = 98MHz, dev= 40kHz, fMOD = 1kHz, fXtal = 10.25MHz, in application circuit, unless

otherwise specified).

Item

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

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