
Multiband Analog and
Digital Television Tuner
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX3543 Evaluation Kit, RF center frequency = 666MHz, IF center frequency = 36.15MHz, registers set according to Table 1,
f REF = 16MHz, V RFVGC = V IFVGC = 3.0V, V CC = 3.3V, T A = +25 N C, unless otherwise noted.)
PARAMETER
RF Gain Control Range
CONDITIONS
(gain at V RFVGC = 3.0V) - (gain at V RFVGC = 0.5V)
MIN
TYP
53
MAX
UNITS
dB
Noise Figure
4
dB
Image Rejection
Image applied at 77.8MHz
above desired channel’s
center frequency
47MHz to 470MHz
470MHz to 862MHz
> 70
> 65
dB
IF VARIABLE-GAIN AMPLIFIER
Maximum Voltage Gain
Minimum Voltage Gain
In-Channel Output V1dB
Output load impedance > 2k I ||3p F, differential load
Output load impedance > 2k I ||3pF, differential load,
V IFVGC = 0.5V
36.15MHz CW output signal
60
19
> 2.5
dB
dB
V P-P
DETECTOR
Wideband Detector
Input-Referred Attack Point
Narrowband Detector
Input-Referred Attack Point
Programmable, R0B[6:4] = 100, CW input signal
Programmable, R0B[2:0] = 011, CW input signal
-36
-47
dBm
dBm
SIGMA-DELTA FRAC-N SYNTHESIZER
N-Divider Value
Fractional-N Resolution
19
20
251
Bits
Phase-Detector Frequency
Phase-Detector Frequency
f XTAL /2
f XTAL /1
8
16
10.5
21
MHz
MHz
REFERENCE OSCILLATOR
Frequency
External Overdrive Level
(Note 2)
AC-coupled sine-wave input
16
0.5
32
1.5
MHz
V P-P
REFERENCE OSCILLATOR OUTPUT BUFFER
Output Frequency
Output Level
/1, /4 modes
Load Impedance > 20k I ||3pF
4
4
1.1
f XTAL
MHz
V P-P
Note 1: Guaranteed by production test at +25 N C. 0 N C and +70 N C are guaranteed by design and characterization.
Note 2: Guaranteed by design and characterization.
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