TDA5745TS datasheet(6/20 Pages) PHILIPS

6 / 20 page

1998 Mar 09

Philips Semiconductors

Preliminary speciﬁcation

Low power mixers/oscillators for

hyperband tuners

TDA5744; TDA5745

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

THERMAL CHARACTERISTICS

CHARACTERISTICS

VCC =5V; Tamb =25 °C; unless otherwise speciﬁed; measured in Fig.11.

SYMBOL

PARAMETER

MIN.

MAX.

UNIT

IO(n)

output current of each pin to ground:

for TDA5744; pins 1 to 6, 9 and 13 to 24

−−10

for TDA5745; pins 1 to 12, 16 and 19 to 24

−−10

tsc(max)

maximum short-circuit time (all pins to VCC and all pins to GND and RFGND)

−

Tstg

IC storage temperature

−40

+150

°C

Tamb

operating ambient temperature

−20

+85

°C

junction temperature

−

150

°C

SYMBOL

PARAMETER

CONDITIONS

VALUE

UNIT

Rth(j-a)

thermal resistance from junction to ambient

in free air

119

K/W

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supplies

VCC

supply voltage

4.5

5.5

ICC

supply current

−

Vsw(VHF)

VHF band switching voltage

−

Vsw(UHF)

UHF band switching voltage

−

VCC

Isw(VHF)

VHF band switching current

−−

µA

Isw(UHF)

UHF band switching current Vsw(UHF) =5V

−

4.5

µA

IF ampliﬁer

S22

output reﬂection coefﬁcient

magnitude

−−12.5 −

phase

−

1.4

−

deg

real part of Zo =Rs +jωLs

−

−Ω

imaginary part of

Zo =Rs +jωLs

−

9.5

−

VHF mixer (including IF ampliﬁer)

fi(RF)

RF input frequency

picture carrier frequency

45.25

−

399.25 MHz

noise ﬁgure

fRF = 50 MHz; see Figs 8 and 9

−

fRF = 150 MHz; see Figs 8 and 9

−

810

fRF = 300 MHz

−

911

gos

optimum source

conductance for noise ﬁgure

fRF =50MHz

−

0.7

−

fRF = 150 MHz

−

0.9

−

fRF = 300 MHz

−

1.5

−

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