tda8042m NXP Semiconductors, tda8042m Datasheet - Page 7

• Manufacturer Part Number: tda8042m
• Description: Quadrature Demodulator
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Notes
1. The voltage gain control range (G
2. V
3. The current I
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
1997 Apr 11
Oscillator
f
N
V
Prescaler
V
V
DIV
I and Q internal filters
B
B
I and Q output amplifiers
V
V
V
R
R
SYMBOL
osc
f
ct(I-Q)
osc(dis)
OH
OL
O(IQ)(DC)
o(IQ)(p-p)
clip(p-p)
Quadrature demodulator
osc
L(IQ)
o(IQ)
osc
1
30
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
resistors V
V
band of 30 MHz around f
spu(IQ)
th
th
.
is the level of voltage to be applied at pin 20 to get a current I
oscillator frequency
frequency drift
oscillator phase noise
oscillator disable voltage at pin 17
HIGH level output voltage
LOW level output voltage
output duty cycle
output spurious voltage at I and Q outputs
bandwidth for 1 dB attenuation
bandwidth for 30 dB attenuation
I and Q channels DC output voltage
I and Q channels output voltage
(peak-to-peak value)
I and Q output clipping level
(peak-to-peak value)
I and Q channels output load resistance
I and Q channels output resistance
crosstalk between I and Q channels
th
oscillator disabled
oscillator enabled
is set at a value close to 2.35 V.
det
increases when the output level (at pins 4 and 9) increases above the value set by the adjustment of
PARAMETER
i(RF)
. The specified tilt is the maximum tilt value found in one of the I and Q channels
VAGC
) is defined as the DC voltage to be applied on pin 3 to get a signal level of
7
note 9
note 10
measured10 kHz
from f
note 12
note 12
note 13
note 14
note 15
V
CC
CONDITIONS
osc
= 5%
det
; note 11
of 0.5 mA at pin 1. This voltage depends on the
175
4.0
4.0
40
30
1.8
500
30
MIN.
50
450
2.45
0.8
67
50
TYP.
Product specification
TDA8042M
325
500
100
91
1.0
3.35
60
MAX.
MHz
kHz
kHz
dBc/Hz
V
V
V
V
%
dB
MHz
MHz
V
V
V
dB
UNIT
.