MAX3541(2007) データシートの表示（PDF） - Maxim Integrated

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MAX3541
(Rev.:2007)

Complete Single-Conversion Television Tuner

Maxim Integrated 

Complete Single-Conversion

Television Tuner

Typical Operating Characteristics (continued)

(MAX3541EV kit, VCC = +3.3V, VIFAGC = 3.0V, VRFAGC = 3.0V, TA = +25°C, unless otherwise noted.)

IFVGA VOLTAGE GAIN vs. IFAGC VOLTAGE

60

-40°C

50

+25°C

40

+85°C

30

20

10

0.5 1.0 1.5 2.0 2.5 3.0

IFAGC VOLTAGE (V)

IFVGA IM3 vs. IFAGC VOLTAGE

-20

-20 MAX3541 toc22

VOUT = 1.5 VP-P

-30

PIN

-40

-40

-50

-60

0.5

IM3

1.0 1.5 2.0 2.5

IFAGC VOLTAGE (V)

-60

-80

3.0

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

NAME

SCL

SDA

VCC

UHF_IN

VHF_IN

RFGND2

LEXT

RFGND3

RFAGC

GND

IFOUT2-

IFOUT2+

IFAGC

IFIN-

IFIN+

IFOVLD

IFOUT1+

IFOUT1-

LDO

DESCRIPTION

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

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

Pin Description

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

UHF RF Input. Requires a DC-blocking capacitor.

VHF RF Input. 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 VGA Gain Control Voltage. Accepts a DC voltage from 0.5V (minimum gain) to 3V (maximum gain).

Ground. Connect to the PCB’s ground plane.

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

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

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

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

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

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

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

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

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

8 _______________________________________________________________________________________

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