1997 Feb 24

2

Philips Semiconductors

Product specification

5 V VHF, hyperband and UHF mixers/oscillators

for TV and VCR 3-band tuners

TDA5736; TDA5737

FEATURES

• Balanced mixer with a common emitter input for band A

(single input)

• 2-pin oscillator for band A

• Balanced mixer with a common base input for bands B

and C (balanced input)

• 3-pin oscillator for band B

• 4-pin oscillator for band C

• Local oscillator buffer output for external prescaler

• SAW filter preamplifier with a low output impedance to

drive the SAW filter directly

• Band gap voltage stabilizer for oscillator stability

• Electronic band switch

• External IF filter between the mixer output and the IF

amplifier input.

APPLICATIONS

• 3-band all channel TV and VCR tuners

• Any standard.

GENERAL DESCRIPTION

The TDA5736 and TDA5737 are monolithic integrated

circuits that perform the mixer/oscillator functions for

bands A, B and C in TV and VCR tuners. These low power

mixer/oscillators require a power supply of 5 V and are

available in a very small package.

These devices give the designer the capability to design

an economical and physically small 3-band tuner.

They are suitable for European standards, as illustrated in

Fig.17, with the following RF bands: 48.25 to 168.25 MHz,

175.25 to 447.25 MHz and 455.25 to 855.25 MHz. With

an appropriate tuned circuit, they are also suitable for

NTSC all channel tuners (USA and Japan).

The tuner development time can be drastically reduced by

using these devices.

QUICK REFERENCE DATA

Note

1. The limits are related to the tank circuits used in Fig.17 and the intermediate frequency. Frequency bands may be

adjusted by the choice of external components.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

supply voltage

−

5.0

−

V

supply current

−

50

−

mA

frequency range

RF input; band A; note 1

41

−

171

MHz

RF input; band B; note 1

166

−

451

MHz

RF input; band C; note 1

446

−

861

MHz

voltage gain

band A

−

23

−

dB

band B

−

34

−

dB

band C

−

34

−

dB

NF

noise figure

band A

−

7.5

−

dB

band B

−

8

−

dB

band C

−

9

−

dB

output voltage level causing 1% cross

modulation in channel

band A

−

116

−

dB

µV

band B

−

115

−

dB

µV

band C

−

115

−

dB

µV