Rainbow Electronics MAX3541 User Manual

General Description

The MAX3541 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 MAX3541 is designed to convert PAL or DVB-C sig­nals in the 47MHz to 68MHz, 174MHz to 230MHz, and
470MHz to 862MHz bands to an intermediate frequency
(IF) of 36MHz.

The MAX3541 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 MAX3541 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 dual­conversion tuner solutions.

The MAX3541 is specified for operation in the -40°C to
+85°C temperature range and is available in a leadless
48-pin flip-chip (fcLGA) package.

Applications

Televisions

Analog/Digital Terrestrial Receivers

Digital Set-Top Boxes

Features

♦ Low Power Consumption: 760mW (typ) from a

+3.3V Supply Voltage

♦ Integrated Tracking Filters

♦ Low Noise Figure: 4.9dB (typ)

♦ Small 7mm x 7mm fcLGA Leadless Package

♦ IF Overload Detector Controls RF Variable-Gain

Amplifier

♦ 2-Wire, I

2

C-Compatible Serial Control Interface

MAX3541

Complete Single-Conversion

Television Tuner

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-1029; Rev 0; 10/07

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

*

EP = Exposed paddle.

#

Indicates RoHS-compliant and exempt from lead-free

requirements.

Pin Configuration/Functional Diagram

PART

TEMP

RANGE

M AX 3541E LM #G42 - 40° C to + 85° C 48 fcLG A- E P * L4877F- A

PIN­PACKAGE

PKG

CODE

XTALPGND

÷ R PD CP

CC

XTALNGND

V

÷ N

DIVIDER

MAX3541

GND

ADDR2GND

ADDR1GND

SCL

SERIAL

3V

CC

4UHF_IN

5VHF_IN

6RFGND2

7LEXT

8RFGND3

9RFAGC

10V

CC

12GND

INTERFACE

1348144715461645174418431942204121402239233824

CC

CPGND

MUXGND

V

VTUNEGND

VCO

EP

GND

CC

GND_TUNEGND

LDOV

V

37

36 IFOUT1-1

35 IFOUT1+2SDA

34 IFOVLD

33 V

CC

32 V

CC

V

REF

+

31 GND

-

30 IFIN+

29 IFIN-

28 V

CC

27 GND

26 IFAGC11GND

25 IFOUT2+

CC

IFOUT2-

MAX3541

Complete Single-Conversion
Television Tuner

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(MAX3541 EV kit, VCC= +3.1V to +3.5V, TA= -40°C to +85°C, no RF signals at RF inputs, default register settings, V

RFAGC

= V

IFAGC

= +3V (minimum attenuation), 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.

VCCto GND..............................................................-0.3V, +3.6V

RFIN, IFIN_ IFOUT1_, IFOUT2_, IFAGC, RFAGC,

VTUNE, LDO, MUX, CP,

XTAL to GND....................................-0.3V to (V

CC

+ 0.3V)

SDA, SCL, ADDR2, ADDR1 to GND......................-0.3V to +3.6V

IFOUT__ Short-Circuit Duration .....................................Indefinite

RF Input Power ...............................................................+10dBm

Continuous Power Dissipation (T

A

= +70°C)

48-Pin fcLGA (derate 25mW/°C above +70°C) ..............1.4W

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +165°C

CAUTION! ESD SENSITIVE DEVICE

PARAMETER CONDITIONS MIN TYP MAX UNITS

SUPPLY VOLTAGE AND CURRENT

Supply Voltage +3.1 +3.5 V

Supply Current

RF and IF AG C Inp ut Bi as C ur r ent At +0.5V and +3V -50 +50 μA

RF and IF AGC Control Voltage (Note 1)

Digital Input Logic-Level Low 0.3 x V

Digital Input Logic-Level High 0.7 x V

SERIAL INTERFACE

Input Logic-Level Low 0.3 x V

Input Logic-Level High 0.7 x V

Input Hysteresis 0.05 x V

SDA, SCL Input Current -10 +10 μA

Output Logic-Level Low 3mA sink current 0.4 V

Output Logic-Level High VCC - 0.5 V

Receive mode (SHDN = 3V) 230 275
Shutdown mode (SHDN = 0V) 5

Minimum attenuation +3

Maximum attenuation +0.5

CC

CC

CC

CC

CC

mA

V

V

V

V

V

V

MAX3541

Complete Single-Conversion

Television Tuner

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS

(MAX3541 EV kit, VCC= +3.1V to +3.5V, TA= -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, TA= +25°C, unless otherwise noted.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

RF INPUT TO IFOUT1 OUTPUT

Operating Frequency Range
(see Table 7)

Output Frequency

Voltage Gain

Input Return Loss Selected channel 10 dB

Noise Figure Maximum gain (V

Input IP2 (In-Band and Out-of-Band Tones)

Input IP3 (In-Band and Out-of-Band Tones)

Input P

1dB

Beats Within Output 0dBmV PIX carrier level -40 dBc

Beats, Converted to Output

Gain Flatness 47MHz to 54MHz 2.5 dB

Isolation

Port-to-Port Isolation Isolation between RF input ports at 215MHz 27 dB

Image Rejection

Spurious Leakage at RF Input

Phase Noise (Single-Sideband)

Output Return Loss Balanced 50Ω load 20 dB

IF VARIABLE-GAIN AMPLIFIER

Input Impedance Balanced 2000 Ω
Output Impedance Balanced (Note 1) 300 Ω

Gain specification met across these
frequency bands

Analog channel PIX carrier 38.9

Digital channel center frequency 36

Source impedance
= 75Ω, load
impedance = 200Ω

RFAGC

Maximum gain (V

RFAGC

At 12.5dB of gain 30
Maximum gain (V

RFAGC

At 12.5dB of gain 10
Maximum gain (V

RFAGC

At 12.5dB of gain -5

VHF input, 140MHz to 500MHz -60

VHF input, 500MHz to 1400MHz -50

UHF input, 950MHz to 1400MHz -60

5MHz to 50MHz, RF input to IF output,
relative to desired channel

Measured at 77.8MHz above desired
channel’s center frequency

5Hz to 65MHz -40

65MHz to 878MHz -40

1kHz -80

10kHz offset -85

100kHz offset (1.5kHz loop bandwidth) -105

1MHz offset (1.5kHz loop bandwidth) -125

47 68

174 230

470 862

Maximum gain
(V

Minimum gain
(V

= 3V)

RAVGC

= 0.5V)

RAVGC

= 3V) 4.9 dB

= 3V) 20

= 3V) -10

= 3V) -38

33 41 49

-10

60 dBc

57 70 dBc

MHz

MHz

dB

dBm

dBm

dBm

dBc

P-P

dBmV

dBc/Hz

MAX3541

Complete Single-Conversion
Television Tuner

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX3541 EV kit, VCC= +3.1V to +3.5V, TA= -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, TA= +25°C, unless otherwise noted.)

Note 1: Guaranteed by design and characterization.

PARAMETER CONDITIONS MIN TYP MAX UNITS

S our ce l oad =

Passband Voltage Gain

1.1kΩ,
output load = 1kΩ

Passband Gain Flatness 32MHz to 40MHz (Note 1) 1.2 dB

Output Voltage V

AGC Gain Slope V

Equivalent Input Voltage Noise Density

Noise Figure Change vs. Attenuation < 0.35 dB/dB

IM3 V

IF OVERLOAD DETECTOR (See the IF Overload Detector Section)

Output Overload Attack Point 0.7 V

Attack Point Accuracy OD REG = 3 ±1 dB

Detector Output Voltage Range

Detector Gain 70 V/V

FREQUENCY SYNTHESIZER

REFERENCE OSCILLATOR

Frequency 8 MHz

DIVIDERS

RF N-Divider Ratio 256 32,767

RF R-Divider Ratio 16 127

LO PHASE DETECTOR AND CHARGE PUMP

Comparison Frequency 63 250 kHz

Charge-Pump Current

Charge-Pump Three-State Current ±5 nA

Charge-Pump Compliance Range 0.4

Charge-Pump Current Matching 5%

LOCAL OSCILLATOR

VCO Tuning Range Tank frequency 2200 4400 MHz

VCO Tuning Gain Tank oscillator gain 500 MHz/V

2-WIRE SERIAL INTERFACE

Clock Frequency 400 kHz

= 3V (Note 1) 2.5 V

IFAGC

= 3V to 0.5V (Note 1) 27 dB/V

IFAGC

At 36MHz, maximum gain (V
(Note 1)

= 1V

OUT

Negative polarity, overload reduces V
(open collector, 0.3mA sink)

CP = 00 0.5

CP = 01 1

CP = 10 1.5

CP = 11 2

, 40dB < gain < 60dB (Note 1) -56 dBc

P-P

Maximum gain setting

= 3V)

(V

IFAGC

Minimum gain setting

= 0.5V)

(V

IFAGC

= 3V)

IFAGC

DET

54 59 63

0.5 3.0 V

21

7.3 nV/√Hz

V

-

CC

0.4

dB

P-P

P-P

mA

V

MAX3541

Complete Single-Conversion

Television Tuner

_______________________________________________________________________________________

5

Typical Operating Characteristics

(MAX3541EV kit, VCC= +3.3V, V

IFAGC

= 3.0V, V

RFAGC

= 3.0V, TA= +25°C, unless otherwise noted.)

VHF NOISE FIGURE vs. FREQUENCY

FREQUENCY (MHz)

NOISE FIGURE (dB)

MAX3541 toc07

48 51 54 57 60 63

1

3

5

7

+25°C

-40°C

+85°C

+55°C

0°C

SUPPLY CURRENT vs. SUPPLY VOLTAGE

208

204

200

SUPPLY CURRENT (mA)

196

192

3.1 3.2 3.3 3.4 3.5

+85°C

+25°C

SUPPLY VOLTAGE (V)

-40°C

VHF VOLTAGE GAIN vs. FREQUENCY

46

-40°C

44

MAX3541 toc01

MAX3541 toc04

VHF VOLTAGE GAIN vs. RFAGC VOLTAGE

60

fRF = 64.5MHz

40

20

VHF VOLTAGE GAIN (dB)

0

-20

0.5 1.0 1.5 2.0 2.5 3.0

VHF VOLTAGE GAIN vs. FREQUENCY

55

50

-40°C

+25°C

+85°C

RFAGC VOLTAGE (V)

-40°C

60

MAX3541 toc02

40

20

UHF VOLTAGE GAIN (dB)

0

-20

60

MAX3541 toc05

50

UHF VOLTAGE GAIN vs. RFAGC VOLTAGE

fRF = 801MHz

-40°C

+25°C

+85°C

0.5 1.0 1.5 2.0 2.5 3.0
RFAGC VOLTAGE (V)

UHF VOLTAGE GAIN vs. FREQUENCY

-40°C

MAX3541 toc03

MAX3541 toc06

42

VHF VOLTAGE GAIN (dB)

40

38

45 50 55 60 65 70

+25°C

FREQUENCY (MHz)

+85°C

45

VHF VOLTAGE GAIN (dB)

40

35

170 180 190 200 210 220 230

+25°C

+85°C

FREQUENCY (MHz)

40

UHF VOLTAGE GAIN (dB)

30

20

470 570 670 770 870

+25°C

FREQUENCY (MHz)

VHF NOISE FIGURE vs. FREQUENCY

7

+25°C

5

3

NOISE FIGURE (dB)

1

175 185 195 205 215 225

+55°C

0°C

-40°C

FREQUENCY (MHz)

+85°C

+85°C

MAX3541 toc08

MAX3541

Complete Single-Conversion
Television Tuner

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(MAX3541EV kit, VCC= +3.3V, V

IFAGC

= 3.0V, V

RFAGC

= 3.0V, TA= +25°C, unless otherwise noted.)

UHF NOISE FIGURE vs. FREQUENCY

FREQUENCY (MHz)

NOISE FIGURE (dB)

MAX3541 toc09

470 560 650 740 830

1

3

5

7

+55°C

+85°C

+25°C

0°C

-40°C

VHF NOISE FIGURE vs. RFAGC VOLTAGE

RFAGC VOLTAGE (V)

NOISE FIGURE (dB)

MAX3541 toc10

1.8 2.0 2.2 2.4 2.6 2.8 3.0

0

4

8

12

16

20

fRF = 224.25MHz

+55°C

+85°C

+25°C

0°C

-40°C

UHF NOISE FIGURE vs. RFAGC VOLTAGE

RFAGC VOLTAGE (V)

NOISE FIGURE (dB)

MAX3541 toc11

1.8 2.0 2.2 2.4 2.6 2.8 3.0

0

4

8

12

16

20

fRF = 631.25MHz

+55°C

+85°C

+25°C

0°C

-40°C

VHF IMAGE REJECTION vs. FREQUENCY

FREQUENCY (MHz)

VHF IMAGE REJECTION (dB)

MAX3541 toc12

47 51 55 59 63

70

72

74

76

78

80

-40°C

0°C

+85°C

+55°C

+25°C

VHF IMAGE REJECTION vs. FREQUENCY

FREQUENCY (MHz)

VHF IMAGE REJECTION (dB)

MAX3541 toc13

175 185 195 205 215 225

72

73

74

75

76

77

+25°C

-40°C

+85°C

+55°C

0°C

UHF IMAGE REJECTION vs. FREQUENCY

FREQUENCY (MHz)

UHF IMAGE REJECTION (dB)

MAX3541 to14

470 570 670 770 870

64

66

68

70

72

74

76

+25°C

-40°C

+85°C

+55°C

0°C