The MAX3540 complete single-conversion television
tuner is designed for use in analog/digital terrestrial applications and digital set-top boxes. This television tuner
draws only 760mW of power from a +3.3V supply voltage.
The MAX3540 is designed to convert NTSC or ATSC signals in the 54MHz to 860MHz band to a 44MHz intermediate frequency (IF).
The MAX3540 includes a variable-gain low-noise amplifier (LNA), multiband tracking filters, a harmonic-rejection mixer, a low-noise IF amplifier, an IF power detector,
and a variable-gain IF amplifier. The MAX3540 also
includes fully monolithic VCOs and tank circuits as well
as a complete frequency synthesizer. This highly integrated design allows for low-power tuner-on-board
applications without the cost and power-dissipation
issues of dual-conversion tuner solutions.
The MAX3540 is specified for operation in the 0°C to
+85°C temperature range and is available in a leadless
48-pin flip-chip (fcLGA) package.
(MAX3540 Evaluation Kit, VCC= +3.1V to +3.5V, no RF signals at RF inputs, default register settings, V
RFAGC
= V
IFAGC
= +3V (minimum
attenuation), T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.3V, TA= +25°C, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
1SCL2-Wire Serial-Clock Interface. Requires a pullup resistor to VCC.
2SDA2-Wire Serial-Data Interface. Requires a pullup resistor to VCC.
3, 10, 23,
28, 32, 33,
37, 41, 44
4UHF_INUHF RF Input. Matched to 75Ω over the operating band. Requires a DC-blocking capacitor.
5VHF_INVHF RF Input. Matched to 75Ω over the operating band. Requires a DC-blocking capacitor.
6RFGND2
7LEXTRF VGA Supply Voltage. Connect through a 270nH pullup inductor to VCC.
8RFGND3
9RFAGCRF AG C G ai n- C ontr ol V ol tag e. Accep ts a D C vol tag e fr om 0.5V ( m i ni m um g ai n) to 3V ( m axi m um g ai n) .
11–22,
27, 31
24IFOUT2-Inver ti ng IF- V G A Outp ut. C onnect to the i np ut of an anti - al i asi ng fi l ter . Req ui r es a D C - b l ocki ng cap aci tor .
25IFOUT2+
26IFAGCIF AGC Gain-Control Voltage. Accepts a DC voltage from 0.5V (minimum gain) to 3V (maximum gain).
29IFIN-Inverting IF-VGA Input. Connect to the output of an IF-SAW filter.
30IFIN+Noninverting IF-VGA Input. Connect to the output of an IF-SAW filter.
34IFOVLDIF Power Detector Open-Collector Output. Requires a 10kΩ pullup resistor to VCC.
35IFOUT1+N oni nver ti ng IF- LN A Outp ut. Req ui r es a D C - b l ocki ng cap aci tor .
36IFOUT1-Inverting IF-LNA Output. Requires a DC-blocking capacitor.
38LDOVCO LDO Bypass. Bypass to ground with a 0.47μF capacitor.
39GND_TUNE
40VTUNEVCO Tuning Input. Connect to the PLL loop filter output.
42MUXTest Output. Leave this pin unconnected during normal operation.
43CPCharge-Pump Output. Connect to the PLL loop filter input.
45XTALNCrystal Oscillator Feedback. See the Typical Application Circuit.
46XTALPCrystal Input. Requires a DC-blocking capacitor.
47ADDR1
48ADDR2
EPEPExposed Paddle. Solder evenly to the PCB ground plane for proper operation.
V
CC
GNDGround. Connect to the PCB’s ground plane.
Power-Supply Connections. Bypass each supply pin to ground with a 1000pF capacitor.
RF Ground. Bypass to the PCB’s ground plane with a 1000pF capacitor. Do not connect RFGND2
and RFGND3 together.
RF Ground. Bypass to the PCB’s ground plane with a 1000pF capacitor. Do not connect RFGND2
and RFGND3 together.
Noninverting IF-VGA Output. Connect to the input of an anti-aliasing filter. Requires a DC-blocking
capacitor.
VTUNE Ground Connection. Connect to the PCB ground plane. All loop filter component GND must
be connected to this pin (see the Typical Application Circuit).
2-Wire Serial-Interface Address Line 1. This pin along with ADDR2 sets the device address for the
2
C-compatible serial interface.
I
2-Wire Serial-Interface Address Line 2. This pin along with ADDR1 sets the device address for the
2
C-compatible serial interface.
I
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