Datasheet

Multiband Analog and
Digital Television Tuner
MAX3543
_______________________________________________________________________________________ 3
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
= +25NC, unless otherwise noted.)
Note 1: Guaranteed by production test at +25NC. 0NC and +70NC are guaranteed by design and characterization.
Note 2: Guaranteed by design and characterization.
PARAMETER CONDITIONS MIN TYP MAX UNITS
RF Gain Control Range (gain at V
RFVGC
= 3.0V) - (gain at V
RFVGC
= 0.5V) 53 dB
Noise Figure 4 dB
Image Rejection
Image applied at 77.8MHz
above desired channel’s
center frequency
47MHz to 470MHz > 70
dB
470MHz to 862MHz > 65
IF VARIABLE-GAIN AMPLIFIER
Maximum Voltage Gain
Output load impedance > 2kI||3pF, differential load
60 dB
Minimum Voltage Gain
Output load impedance > 2kI||3pF, differential load,
V
IFVGC
= 0.5V
19 dB
In-Channel Output V1dB 36.15MHz CW output signal > 2.5 V
P-P
DETECTOR
Wideband Detector
Input-Referred Attack Point
Programmable, R0B[6:4] = 100, CW input signal -36 dBm
Narrowband Detector
Input-Referred Attack Point
Programmable, R0B[2:0] = 011, CW input signal -47 dBm
SIGMA-DELTA FRAC-N SYNTHESIZER
N-Divider Value 19 251
Fractional-N Resolution 20 Bits
Phase-Detector Frequency f
XTAL
/2 8 10.5 MHz
Phase-Detector Frequency f
XTAL
/1 16 21 MHz
REFERENCE OSCILLATOR
Frequency (Note 2) 16 32 MHz
External Overdrive Level AC-coupled sine-wave input 0.5 1.5 V
P-P
REFERENCE OSCILLATOR OUTPUT BUFFER
Output Frequency /1, /4 modes 4 4 f
XTAL
MHz
Output Level
Load Impedance > 20kI||3pF
1.1 V
P-P