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MAX2112
Complete, Direct-Conversion Tuner for DVB-S2 Applications
3.3V Satellite Tuner Provides DVB-S2 Performance at Only 330mW
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Status
Active: In Production.
Description
The MAX2112 low-cost, direct-conversion tuner IC is designed for satellite set-top and VSAT applications. The IC is intended for 8PSK and Digital Video Broadcast (DVB-S2) applications.
The MAX2112 directly converts the satellite signals from the LNB to baseband using a broadband I/Q
downconverter. The operating frequency range extends from 925MHz to 2175MHz.
The device includes an LNA and an RF variable-gain amplifier, I and Q downconverting mixers, and baseband lowpass filters with programmable cutoff frequency control and digitally controlled baseband variable-gain amplifiers. Together, the RF and baseband variable-gain amplifiers provide more than 80dB of gain control range. The IC is compatible with virtually all DVB-S2 demodulators.
The MAX2112 includes fully monolithic VCOs, as well as a complete fractional-N frequency synthesizer. Additionally, an on-chip crystal oscillator is provided along with a buffered output for driving additional tuners and demodulators. Synthesizer programming and device configuration are accomplished with a 2-wire serial interface. The IC features a VCO autoselect (VAS) function
that automatically selects the proper VCO. For multituner applications, the device can be configured to have one of two 2-wire interface addresses. A low-power standby mode is available whereupon the signal path is shut down while leaving the reference oscillator, digital interface,
and buffer circuits active, providing a method to reduce power in single and multituner applications.
The MAX2112 is the most advanced DBS tuner available today. The low noise figure eliminates the need for an external LNA. A small number of passive components are needed to form a complete DVB-S2 RF front-end solution. The tuner is available in a very small 28-pin thin QFN package.
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Data Sheet
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An evaluation kit is available: MAX2112EVKIT NOTE: This product uses the following:MAX2112, MAX2117, MAX2119, and MAX2120 SoftwareMax2112 Lab
Key Features
- 925MHz to 2175MHz Frequency Range
- Monolithic VCO
- Low Phase Noise: -97dBc/Hz at 10kHz
- No Calibration Required
- High Dynamic Range: -75dBm to 0dBm
- Integrated Variable BW LP Filters: 4MHz to 40MHz
- Single +3.3V ±5% Supply
- Low-Power Standby Mode
- Address Pin for Multituner Applications
- Differential I/Q Interface
- I²C 2-Wire Serial Interface
- Very Small 28-Pin TQFN Package
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Applications/Uses
- DirecTV and Dish Network DBS
- DVB-S2
- VSATs
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Key Specifications:
| STB and TV Tuners |
| Part Number |
Ref. Clock Freq.
(MHz) |
IF fOUT
(MHz) |
Noise Figure
(dB) |
VSUPPLY
(V) |
ISUPPLY
(mA) |
Applications |
fIN |
Features |
Footprint
(mm x mm) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| typ |
max w/pins |
See Notes |
| MAX2112 |
12 to 30 |
40 |
8 |
3.3 ±5% |
100 |
DVB-S2 |
925 to 2175 |
| -40 to +85 Temperature Range Available | | -75 to 0dBm dynamic range | | 4-40MHz variable LPF | | Differential I/Q Outputs | | Low Power Standby Mode |
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5.0 x 5.0 |
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26 |
$1.85 @1k |
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See All STB and TV Tuners (17)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Pin Configuration/Functional Diagram
Application Notes
Product Guides
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX2112CTI+
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Active |
TQFN;28 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0023 (PDF)
Use pkgcode/variation: T2855+3*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX2112CTI+T
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Active |
TQFN;28 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0023 (PDF)
Use pkgcode/variation: T2855+3*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX2112ETI+
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Active |
TQFN;28 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0023 (PDF)
Use pkgcode/variation: T2855+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX2112ETI+T
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Active |
TQFN;28 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0023 (PDF)
Use pkgcode/variation: T2855+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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| MAX2120 |
Complete, Direct-Conversion Tuner for DVB-S and Free-to-Air Applications |
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Information Index
Document Ref.: 19-0869
Rev 2;
2010-09-20
This page last modified: 2011-04-11
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