User Manual

MAX3541
Complete Single-Conversion
Television Tuner
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AC ELECTRICAL CHARACTERISTICS
(MAX3541 EV kit, V
CC
= +3.1V to +3.5V, T
A
= -40°C to +85°C, 75Ω system impedance, default register settings, V
RFAGC
= V
IFAGC
=
+3V (minimum attenuation), unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
RF INPUT TO IFOUT1 OUTPUT
47 68
174 230
Operating Frequency Range
(see Table 7)
Gain specification met across these
frequency bands
470 862
MHz
Analog channel PIX carrier 38.9
Output Frequency
Digital channel center frequency 36
MHz
Maximum gain
(V
RAVGC
= 3V)
33 41 49
Voltage Gain
Source impedance
= 75Ω, load
impedance = 200Ω
Minimum gain
(V
RAVGC
= 0.5V)
-10
dB
Input Return Loss Selected channel 10 dB
Noise Figure Maximum gain (V
RFAGC
= 3V) 4.9 dB
Maximum gain (V
RFAGC
= 3V) 20
Input IP2 (In-Band and Out-of-Band Tones)
At 12.5dB of gain 30
dBm
Maximum gain (V
RFAGC
= 3V) -10
Input IP3 (In-Band and Out-of-Band Tones)
At 12.5dB of gain 10
dBm
Maximum gain (V
RFAGC
= 3V) -38
Input P
1dB
At 12.5dB of gain -5
dBm
Beats Within Output 0dBmV PIX carrier level -40 dBc
VHF input, 140MHz to 500MHz -60
VHF input, 500MHz to 1400MHz -50
Beats, Converted to Output
UHF input, 950MHz to 1400MHz -60
dBc
Gain Flatness 47MHz to 54MHz 2.5 dB
P-P
Isolation
5MHz to 50MHz, RF input to IF output,
relative to desired channel
60 dBc
Port-to-Port Isolation Isolation between RF input ports at 215MHz 27 dB
Image Rejection
Measured at 77.8MHz above desired
channel’s center frequency
57 70 dBc
5Hz to 65MHz -40
Spurious Leakage at RF Input
65MHz to 878MHz -40
dBmV
1kHz -80
10kHz offset -85
100kHz offset (1.5kHz loop bandwidth) -105
Phase Noise (Single-Sideband)
1MHz offset (1.5kHz loop bandwidth) -125
dBc/Hz
Output Return Loss Balanced 50Ω load 20 dB
IF VARIABLE-GAIN AMPLIFIER
Input Impedance Balanced 2000 Ω
Output Impedance Balanced (Note 1) 300 Ω