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Fabricante

MAX3540

Complete Single-Conversion Television Tuner

Maxim Integrated 

Complete Single-Conversion Television Tuner

PIN

1

2

3, 10, 23,

28, 32, 33,

37, 41, 44

4

5

6

7

8

9

11–22,

27, 31

24

25

26

29

30

34

35

36

38

39

40

42

43

45

46

47

48

EP

NAME

SCL

SDA

FUNCTION

2-Wire Serial-Clock Interface. Requires a pullup resistor to VCC.

2-Wire Serial-Data Interface. Requires a pullup resistor to VCC.

Pin Description

VCC

Power-Supply Connections. Bypass each supply pin to ground with a 1000pF capacitor.

UHF_IN

VHF_IN

RFGND2

LEXT

RFGND3

RFAGC

UHF RF Input. Matched to 75Ω over the operating band. Requires a DC-blocking capacitor.

VHF RF Input. Matched to 75Ω over the operating band. Requires a DC-blocking capacitor.

RF Ground. Bypass to the PCB’s ground plane with a 1000pF capacitor. Do not connect RFGND2

and RFGND3 together.

RF VGA Supply Voltage. Connect through a 270nH pullup inductor to VCC.

RF Ground. Bypass to the PCB’s ground plane with a 1000pF capacitor. Do not connect RFGND2

and RFGND3 together.

RF AGC Gain-Control Voltage. Accepts a DC voltage from 0.5V (minimum gain) to 3V (maximum gain).

GND

Ground. Connect to the PCB’s ground plane.

IFOUT2- Inverting IF-VGA Output. Connect to the input of an anti-aliasing filter. Requires a DC-blocking capacitor.

IFOUT2+ Noninverting IF-VGA Output. Connect to the input of an anti-aliasing filter. Requires a DC-blocking

capacitor.

IFAGC IF AGC Gain-Control Voltage. Accepts a DC voltage from 0.5V (minimum gain) to 3V (maximum gain).

IFIN-

Inverting IF-VGA Input. Connect to the output of an IF-SAW filter.

IFIN+ Noninverting IF-VGA Input. Connect to the output of an IF-SAW filter.

IFOVLD IF Power Detector Open-Collector Output. Requires a 10kΩ pullup resistor to VCC.

IFOUT1+ Noninverting IF-LNA Output. Requires a DC-blocking capacitor.

IFOUT1- Inverting IF-LNA Output. Requires a DC-blocking capacitor.

LDO

VCO LDO Bypass. Bypass to ground with a 0.47μF capacitor.

GND_TUNE

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).

VTUNE VCO Tuning Input. Connect to the PLL loop filter output.

MUX

Test Output. Leave this pin unconnected during normal operation.

CP

Charge-Pump Output. Connect to the PLL loop filter input.

XTALN Crystal Oscillator Feedback. See the Typical Application Circuit.

XTALP Crystal Input. Requires a DC-blocking capacitor.

ADDR1

2-Wire Serial-Interface Address Line 1. This pin along with ADDR2 sets the device address for the

I2C-compatible serial interface.

ADDR2

2-Wire Serial-Interface Address Line 2. This pin along with ADDR1 sets the device address for the

I2C-compatible serial interface.

EP

Exposed Paddle. Solder evenly to the PCB ground plane for proper operation.

8 _______________________________________________________________________________________

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