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PDF MAX3580 Data sheet ( Hoja de datos )
| Número de pieza | MAX3580 | |
| Descripción | Direct Conversion TV Tuner | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX3580 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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MAX3580
EVALUATION KIT AVAILABLE
Direct-Conversion TV Tuner
General Description
The MAX3580 fully integrated, direct-conversion TV tuner
is designed for Digital Video Broadcasting-Terrestrial
(DVB-T) applications. The integrated tuner covers a
170MHz to 230MHz input frequency range for the VHF-III
band and 470MHz to 878MHz for the UHF band.
The MAX3580 direct-conversion tuner integrates an
RF input switch and a multiband tracking filter, allowing
low-power tuner-on-board applications without the cost
and power-dissipation issues of dual-conversion tuner
solutions. The zero-IF architecture eliminates the need
for SAW filters by providing baseband I and Q outputs
directly to the demodulator. In addition, DC-offset can-
cellation is implemented on-chip using a mixed-signal
architecture to improve the second-order distortion perfor-
mance and the dynamic range of the downstream digitizer
and demodulator.
The MAX3580 features dynamic gain control of more than
76dB and a typical midband noise figure of 4.7dB referred
to the LNA input. The VCO architecture optimizes both in-
band and wideband phase noise for OFDM applications
where sensitivity to both 1kHz phase noise and wideband
phase noise related to strong adjacents can be a problem.
The MAX3580 communicates using a 2-wire serial bus.
The device operates from a typical +3.3V power sup-
ply and dissipates 650mW. The MAX3580 is available
in a small 32-pin TQFN package (5mm x 5mm) with an
exposed paddle.
Applications
●● Digital Televisions
●● Digital Terrestrial Set-Tops
●● Laptop Televisions
●● USB Peripherals
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX3580ETJ+
-40°C to +85°C
32 TQFN-EP*
MAX3580ETJ+T -40°C to +85°C
32 TQFN-EP*
*EP = Exposed pad.
+Denotes lead(Pb)-free/RoHS-compliant package.
T = Tape-and-reel package.
Features
●● 650mW Power Dissipation (at VCC = +3.3V)
●● I and Q Baseband Outputs Eliminate All IF-SAW
Filters
●● Integrated RF Tracking Filters
●● Tunable Baseband Lowpass Filters
●● Full-Band VHF-III and UHF Tuning
●● +38dB Digital ACPR, +47dB Analog ACPR
●● Low Noise Figure: 4.7dB (typ)
●● Frac-N Synthesizer for -90dBc/Hz Close-In
Phase Noise
●● +3.1V to +3.5V Supply Voltage Range
●● Ultra-Small, 5mm x 5mm Thin QFN Package
Pin Configuration/Functional Diagram
TOP VIEW
32 31 30 29 28 27 26 25
+
SDA 1
MAX3580
CHARGE
PUMP
24 CP
SCL 2
RFIN2 3
RFIN 4
SERIAL INTERFACE,
CONTROL, AND
SYNTHESIZER
LO
23 LDO
22 GND_TUNE
21 VTUNE
ADDR2 5
20 VCC_VCO
GND_LNA 6
VCC_RF 7
TRACKING
FILTER
0 90 LO
19 BB_AGC
18 BBI+
LEXT 8
17 BBI-
9 10 11 12 13 14 15 16
19-0611; Rev 10; 4/14
1 page  
MAX3580
Direct-Conversion TV Tuner
Electrical Characteristics (continued)
(MAX3580 EV kit, VCC = +3.1V to +3.5V, VGND = 0V, VBB_AGC = VRF_AGC = +2.85V, RF input terminated into a 75Ω load, BBI_ and
BBQ_ are open, no input signal, VCO active, registers set according to the specified default register conditions, unless otherwise
specified. Typical values are at VCC = +3.3V, TA = +25°C, unless otherwise specified.) (Note 1)
PARAMETER
Rejection Ratio
DC Output Voltage
Output DC Offset
Baseband Highpass Cutoff
AGC Gain Slope
Ratio of Passband to
Stopband Noise
SYMBOL
VCM
CONDITIONS
At 5.25MHz (UHF mode)
At 4.75MHz (VHF mode)
At 13.25MHz (UHF mode) (Note 3)
At 11.75MHz (VHF mode) (Note 3)
At > 16.2MHz
Common mode (Note 11)
VBB_AGC = 2.85V
Programmable
VBB_AGC = 0.5V to 2.85V
VBB_AGC = 2.85V, 10kHz to 3.8MHz
vs. 16.2MHz to 23.8MHz
MIN TYP MAX
23
23
63
61
84
0.485 x VCC
-100
+100
20 to 200
14 35
15
UNITS
dB
VDC
mV
Hz
dB/V
dB
2-WIRE INTERFACE
Clock Rate
400 kHz
Note 1: Part is tested at room temperature only. Performance at cold and hot temperature is guaranteed by design and
characterization.
Note 2: The specified overall voltage gain is suitable to amplify -93dBm to -20dBm to 1VP-P at the baseband output.
Note 3: Guaranteed by design characterization over the specified operating conditions. Not production tested.
Note 4: BB_AGC adjusted for gain = 72dB with RF_AGC at 2.85V.
Note 5: Two tones at a) 230MHz and 431MHz with IM measured at 201MHz and b) 230MHz and 701MHz with IM measured at
471MHz.
Note 6: Two tones at 499MHz and 689MHz with IM measured at 879MHz.
Note 7: IM3 measured with two tones within the adjacent channel at a) 205.75MHz and 210.5MHz with IM measured at 201MHz
and b) 475.25MHz and 479.5MHz with IM measured at 471MHz.
Note 8: Measured at RF = 171MHz with harmonics at 511MHz (3rd harmonic) and 851MHz (5th harmonic).
Note 9: Delay of 2ns equal 2.74° phase error.
Note 10: UHF rolloff of 4dB in addition to gain flatness specification.
Note 11: Production tested at VCC = +3.5V to limits of 1.7V -0.12/+0.1V.
Note 12: Operation in the VHF band requires the R-divider = 2.
Note 13: Operation of the N-divider at values below 12 is not tested or guaranteed.
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX3580
Direct-Conversion TV Tuner
Typical Application Circuit
VCC
REF_BUFF
VCC
32 31 30 29 28 27 26 25
SDA 1
SCL 2
CHARGE
PUMP
CP
24
LDO
23
RFIN2 3
RFIN
4
ADDR2
5
SERIAL INTERFACE,
CONTROL, AND
SYNTHESIZER
MAX3580
LO
GND_TUNE
22
VTUNE
21
20 VCC_VCO
VCC
GND_LNA
6
VCC
VCC_RF 7
TRACKING
FILTER
0 90 LO
LEXT
VCC 8
19
BBI+
18
BBI-
17
I CHANNEL
BB_AGC
9 10 11 12 13 14 15 16
RF_AGC
VCC
Q CHANNEL
3.3V
10kΩ
Rohm
2SA1037AK
1µF
Figure 1. Single-Loop AGC Schematic
www.maximintegrated.com
MAX3580
39kΩ
1nF
1kΩ
1kΩ
100nF
DEMODULATOR
PWM
Maxim Integrated │ 11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet MAX3580.PDF ] | |
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