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TDA5731M/C1

Low power VHF, UHF and hyperband mixer/oscillator for TV and VCR 3-band tuners

Philips Electronics 

Philips Semiconductors

Low power VHF, UHF and hyperband

mixer/oscillator for TV and VCR 3-band tuners

Product specification

TDA5731M

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP. MAX. UNIT

Band C oscillator

fR

fshiift

χripple(p-p)

frequency range

frequency shift

ripple susceptibility of supply

voltage (peak-to-peak value)

Tamb = −10 to +80 °C;

VP = 4.5 to 5.5 V;

Vtune = 0.45 to 28 V

∆VP = ±5%; note 3

fi = 485 MHz; note 4

485

−

−

−

20

−

fripple(p-p)

fdrift

frequency ripple

(peak-to-peak value)

frequency drift

from 20 Hz to 500 kHz;

fi = 900 MHz

without compensation;

notes 5 and 6

10

−

−

−

5 s to 15 min after switching on; −

−

without compensation; note 7

900

MHz

400

kHz

−

mV

−

mV

2.5

MHz

600

kHz

LO output

YO

Vo

SRF

output admittance (GP//CP) fi = 80 MHz; see Fig.10

−

fi = 80 MHz; see Fig.10

−

fi = 900 MHz; see Fig.10

−

fi = 900 MHz; see Fig.10

−

output voltage

RL = 50 Ω; Tamb = −10 to +80 °C; 80

VP = 4.5 to 5.5 V;

spurious signal on LO output RL = 50 Ω; Tamb = −10 to +80 °C; −

with respect to LO output

VP = 4.5 to 5.5 V; note 10

signal

2.4 −

0.9 −

4.6 −

0.9 −

91

100

−

−10

mS

pF

mS

pF

dBµV

dB

HLO

LO signal harmonics with

respect to LO signal

RL = 50 Ω; Tamb = −10 to +80 °C; −

VP = 4.5 to 5.5 V;

−

−10

dB

Notes

1. Cross modulation measurement is achieved using the 3 equal signals method (see Fig.4).

2. The gain is defined as the transducer gain (measured in Fig.8) plus the voltage transformation ratio of L7 to L8

(5 : 1, 15.4 dB).

3. The frequency shift is defined as a change in oscillator frequency for a variation of supply voltage. In one instance

VP = 5 to 4.75 V and in the other instance VP = 5 to 5.25 V. In both cases, the frequency shift is below the specified

value.

4. The frequency ripple susceptibility is measured at 500 kHz at the LO output (see Fig.5). The level of the ripple signal

is increased until a difference of 53.5 dB is reached at the IF output.

5. The frequency drift is defined as the change in oscillator frequency for a variation of ambient temperature, on the one

hand from Tamb = 25 °C to Tamb = 0 °C and on the other hand from Tamb = 25 °C to Tamb = 50 °C.

6. The capacitors in the oscillator circuits of Fig.8 are as follows:

a) Band A: C1, C5 and C7.

b) Band B: C4 and C9 and C11.

c) Band C: C2, C3, C6, C8 and C10 are NP0 types.

7. Switching on drift is the change in oscillator frequency between 5 seconds and 15 minutes after switching on.

8. The values have been corrected for hybrid and cable losses. The symmetrical output impedance of the circuit is

100 Ω.

1995 Mar 21

8

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