Rainbow Electronics MAX3540 User Manual

General Description
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.
Applications
Televisions
Analog/Digital Terrestrial Receivers
Digital Set-Top Boxes
Cable Modems
VOIP Gateways
Features
Low Power Consumption: 760mW (typ) from a
+3.3V Supply Voltage
Integrated Tracking Filters
ATSC A/74 Compliant
40dB Adjacent Channel Protection Ratio (ACPR)
4.4dB (typ) Low Noise Figure
Small, 7mm x 7mm, fcLGA Leadless Package
256-QAM-Compatible Phase-Noise Performance
IF Overload Detector Controls RF Variable-Gain
Amplifier
2-Wire I
2
C-Compatible Serial Control Interface
MAX3540
Complete Single-Conversion Television Tuner
________________________________________________________________
Maxim Integrated Products
1
Pin Configuration
Ordering Information
19-0848; 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.
EVALUATION KIT
AVAILABLE
PART
TEMP
RANGE
PIN­PACKAGE
PKG
CODE
MAX3540ULM#G42 0°C to +85°C 48 fcLGA-EP* L4877A-E
SCL
SDA
V
UHF_IN
VHF_IN
RFGND2
LEXT
RFGND3
RFAGC
V
GND
GND
GND
MUX
VCO
DIVIDER
GND
CC
V
GND
VTUNE
40414243 39 38 37464748
GND
XTALP
GND
÷
16 21201918 22 23 24151413
XTALN
4445
R
MAX3540
17
GND
VCCCP
PD CP
÷
N
EP
GND
ADDR2
ADDR1
+
1
2
3
CC
4
5
6
7
8
9
10
CC
11
12
GND
SERIAL
INTERFACE
GND
LDO
GND_TUNE
V
+
-
CC
V
GND
REF
CC
V
IFOUT2-
36
IFOUT1-
35
IFOUT1+
34
IFOVLD
33
V
CC
V
32
CC
31
GND
30
IFIN+
IFIN-
29
28
V
CC
27
GND
26
IFAGC
25
IFOUT2+
MAX3540
Complete Single-Conversion Television Tuner
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(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.
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...............................0°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10s) .................................+240°C
CAUTION! ESD SENSITIVE DEVICE
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
Digital Input Logic-Level High
SERIAL INTERFACE
Input Logic-Level Low
Input Logic-Level High
Input Hysteresis
SDA, SCL Input Current -10 +10 μA
Output Logic-Level Low 3mA sink current 0.4 V
Output Logic-Level High
PARAMETER CONDITIONS MIN TYP MAX UNITS
Receive mode 240 275
Shutdown mode 5
Minimum attenuation +3
Maximum attenuation +0.5
0.7 x V
CC
0.7 x V
CC
V
CC
0.5
0.05 x V
-
CC
0.3 x V
CC
0.3 x V
CC
mA
V
V
V
V
V
V
V
MAX3540
Complete Single-Conversion Television Tuner
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(MAX3540 Evaluation Kit, VCC= +3.1V to +3.5V, 75Ω system impedance, 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.)
RF INPUT TO IFOUT1_ OUTPUT
Operating Frequency Range (See Table 7)
Output Frequency
Voltage Gain
Operating Frequency Range
Input Return Loss Worst case, selected channel 8 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
Beats Within Output 0dBmV PIX carrier level (Note 1) -60 dBc
Gain Flatness 54MHz to 60MHz 1.5 dB
Isolation
Port-to-Port Isolation Isolation between RF input ports at 215MHz 30 dB
Image Rejection
Spurious Leakage at RF Input
Output Return Loss Balanced 50Ω load 9 dB
PARAMETER CONDITIONS MIN TYP MAX UNITS
VHF_IN, LPF enabled, INPT = 00 54 100
VHF_IN, LPF disabled, INPT = 01 100 300
UHF_IN, INPT = 10 300 860
Analog channel PIX carrier 45.75
Digital channel center frequency 44
Source impedance =
Ω, load impedance =
75 200
Ω
Gain specification met across these frequency bands
RFVGC
Maximum gain, V
RFVGC
Maximum gain, V 54MHz to 860MHz Maximum gain, V broadcast channels
M i ni m um g ai n, V
VHF_IN 54 300
UHF_IN 300 860
= 3V (Note 1) 4.4 dB
= 3V 15
= 3V,
RFAGC
= 3V,
RFAGC
= 0.5V -11
R FA GC
At 12.5dB of gain 29 Maximum gain, V
= 3V -13
RFVGC
At 12.5dB of gain 5 11 Maximum gain, V
1dB At 12.5dB of gain, CW tone at f
69 in UHF band
VHF_IN from 150MHz to 960MHz -60
VHF_IN from 960MHz to 1400MHz -40Beats, Converted to Output
UHF_IN from 600MHz to 1400MHz -40
5MHz to 50MHz, RF input to IF output, relative to desired channel
Measured at 91.5MHz above desired channel’s center frequency
5MHz to 65MHz -40
65MHz to 878MHz -40
10kHz offset -85
100kHz offset, 1.5kHz loop bandwidth -105Phase Noise (Single-Sideband)
1MHz offset, 1.5kHz loop bandwidth -125
= 3V -24.5
RFVGC
- 36MHz, tested at Ch
C
54MHz to 860MHz 70
Broadcast channels, T
= +25°C
A
28.0 34 45.5
66
34
-3
60 dBc
MHz
MHz
dB
MHz
dBm
dBm
dBm
dBc
P-P
dBc
dBmV
dBc/Hz
MAX3540
Complete Single-Conversion Television Tuner
4 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX3540 Evaluation Kit, VCC= +3.1V to +3.5V, 75Ω system impedance, 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.)
Note 1: Guaranteed by design and characterization.
IF VARIABLE-GAIN AMPLIFIER
Input Impedance Balanced 2000 Ω Output Impedance Balanced (Note 1) 300 Ω
Passband Voltage Gain
Passband Gain Flatness 40MHz to 48MHz (Note 1) 1.2 dB
Output Voltage V
AGC Gain Slope V
Equivalent Input Voltage Noise Density
Noise Figure Change vs. Attenuation
IM3 V
IF OVERLOAD DETECTOR (see the IF Overload Detector section)
Output Overload Attack Point 0.7 V
Attack-Point Accuracy ±1 dB
Detector Output Voltage Range
Detector Gain 70 V/V
FREQUENCY SYNTHESIZER
REFERENCE OSCILLATOR
Frequency 4 MHz
DIVIDERS
RF N-Divider Ratio 256 32,767
RF R-Divider Ratio 8 127
LO PHASE DETECTOR AND CHARGE PUMP
Comparison Frequency 31.50 250.00 kHz
Charge-Pump Current
C har g e- P um p Thr ee- S tate C ur r ent ±5 nA
Charge-Pump Current Matching 5%
LOCAL OSCILLATOR (OSCILLATOR WITH NARROW BAND LOOP)
VCO Tuning Range Tank frequency 2160 4400 MHz
VCO Tuning Gain Tank oscillator gain 500 MHz/V
2-WIRE SERIAL INTERFACE
Clock Frequency 400 kHz
PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum gain setting,
= 3V
V
S our ce l oad = 300Ω , outp ut l oad = 300Ω
= 3V (Note 1) 2 V
IFAGC
= 3V to 0.5V (Note 1) 30 dB/V
IFAGC
At 44MHz, maximum gain, V
= 1.5V
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) -54 dBc
P-P
IFAGC
Minimum gain setting,
= 0.5V
V
IFAGC
= 3V (Note 1) 7.3 nV/Hz
IFAGC
DET
54 56 65
0.5 3.0 V
< 0.35 dB/dB
dB
21
P-P
P-P
mA
MAX3540
Pin Description
Complete Single-Conversion Television Tuner
_______________________________________________________________________________________ 5
PIN NAME FUNCTION
1 SCL 2-Wire Serial-Clock Interface. Requires a pullup resistor to VCC.
2 SDA 2-Wire Serial-Data Interface. Requires a pullup resistor to VCC.
3, 10, 23,
28, 32, 33,
37, 41, 44
4 UHF_IN UHF RF Input. Matched to 75Ω over the operating band. Requires a DC-blocking capacitor. 5 VHF_IN VHF RF Input. Matched to 75Ω over the operating band. Requires a DC-blocking capacitor.
6 RFGND2
7 LEXT RF VGA Supply Voltage. Connect through a 270nH pullup inductor to VCC.
8 RFGND3
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
24 IFOUT2- 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 .
25 IFOUT2+
26 IFAGC IF AGC Gain-Control Voltage. Accepts a DC voltage from 0.5V (minimum gain) to 3V (maximum gain).
29 IFIN- Inverting IF-VGA Input. Connect to the output of an IF-SAW filter.
30 IFIN+ Noninverting IF-VGA Input. Connect to the output of an IF-SAW filter. 34 IFOVLD IF Power Detector Open-Collector Output. Requires a 10kΩ pullup resistor to VCC.
35 IFOUT1+ N oni nver ti ng IF- LN A Outp ut. Req ui r es a D C - b l ocki ng cap aci tor .
36 IFOUT1- Inverting IF-LNA Output. Requires a DC-blocking capacitor.
38 LDO VCO LDO Bypass. Bypass to ground with a 0.47μF capacitor.
39 GND_TUNE
40 VTUNE VCO Tuning Input. Connect to the PLL loop filter output.
42 MUX Test Output. Leave this pin unconnected during normal operation.
43 CP Charge-Pump Output. Connect to the PLL loop filter input.
45 XTALN Crystal Oscillator Feedback. See the Typical Application Circuit.
46 XTALP Crystal Input. Requires a DC-blocking capacitor.
47 ADDR1
48 ADDR2
EP EP Exposed Paddle. Solder evenly to the PCB ground plane for proper operation.
V
CC
GND Ground. 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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