1997 Apr 11

7

Philips Semiconductors

Product specification

Quadrature demodulator

TDA8042M

Notes

800 mV (peak-to-peak value) at I and Q outputs.

The lowest control voltage corresponds to the highest sensitivity and gain.

amplitude of the signal at I and Q outputs.

The AGC threshold voltage can be set by a resistive voltage divider connected at pin 20. Without the external

4. The phase error is defined as the phase quadrature imbalance between I and Q channels.

5. The gain error is defined as the phase quadrature imbalance between I and Q channels.

6. The tilt is defined as the difference between the maximum and the minimum channel gain measured in a frequency

band of

Oscillator

oscillator frequency

note 9

175

−

325

MHz

frequency drift

note 10

−−

500

kHz

−−

100

kHz

oscillator phase noise

measured10 kHz

−−

91

dBc/Hz

oscillator disable voltage at pin 17

oscillator disabled

−−

1.0

V

oscillator enabled

4.0

−−

V

Prescaler

HIGH level output voltage

note 12

4.0

−−

V

LOW level output voltage

note 12

−−

3.35

V

δ

output duty cycle

40

50

60

%

output spurious voltage at I and Q outputs

note 13

−−50

−

dB

I and Q internal filters

bandwidth for 1 dB attenuation

30

−−

MHz

bandwidth for 30 dB attenuation

−

450

−

MHz

I and Q output amplifiers

I and Q channels DC output voltage

−

2.45

−

V

I and Q channels output voltage

(peak-to-peak value)

note 14

−

0.8

−

V

I and Q output clipping level

(peak-to-peak value)

1.8

V

I and Q channels output load resistance

note 15

500

−−Ω

I and Q channels output resistance

−

67

−Ω

crosstalk between I and Q channels

30

−−

dB

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT