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MAX7044
300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter
Low-Power, 300MHz to 450MHz, Crystal-Based ASK Transmitter has +13dBm Output Power
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Status
Active: In Production.
Description
The MAX7044 crystal-referenced phase-locked-loop (PLL) VHF/UHF transmitter is designed to transmit OOK/ASK data in the 300MHz to 450MHz frequency range. The MAX7044 supports data rates up to 100kbps, and provides output power up to +13dBm into a 50Ω load while only drawing 7.7mA at 2.7V.
The crystal-based architecture of the MAX7044 eliminates many of the common problems with SAW-based transmitters by providing greater modulation depth, faster frequency settling, higher tolerance of the transmit frequency, and reduced temperature dependence. The MAX7044 also features a low supply voltage of +2.1V to +3.6V. These improvements enable better overall receiver performance when using the MAX7044 together with a superheterodyne receiver such as the MAX1470 or MAX1473.
A simple, single-input data interface and a buffered clock-out signal at 1/16th the crystal frequency make the MAX7044 compatible with almost any microcontroller or code-hopping generator.
The MAX7044 is available in an 8-pin SOT23 package and is specified over the -40°C to +125°C automotive temperature range.
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Data Sheet
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An evaluation kit is available: MAX7044EVKIT
Key Features
- +2.1V to +3.6V Single-Supply Operation
- OOK/ASK Transmit Data Format
- Up to 100kbps Data Rate
- +13dBm Output Power into 50Ω Load
- Low 7.7mA (typ) Operating Supply Current*
- Uses Small, Low-Cost Crystal
- Small 3mm x 3mm 8-Pin SOT23 Package
- Fast-On Oscillator: 250µs Startup Time
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Applications/Uses
- Garage Door Openers
- Remote Keyless Entry (RKE)
- RF Remote Controls
- Security Systems
- Tire-Pressure Monitoring (TPM)
- Wireless Computer Peripherals
- Wireless Game Consoles
- Wireless Sensors
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Key Specifications:
| ISM RF Transmitters |
| Part Number |
Solutions |
Applications |
Band/ Freq.
(MHz) |
Features |
Footprint
(mm x mm) |
Smallest Available Pckg.
(mm2) |
Package/Pins |
Industry Qualified |
Budgetary Price |
| max w/pins |
See Notes |
| MAX7044 |
300 to 450MHz-ISM RKE |
| Automotive | | Garage Door Openers | | Home Automation | | ISM | | ISM (Europe) | | RF Remote Controls | | RKE | | Security Systems | | TPM |
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300 to 450 |
| 2.1V to 3.6V Single-Supply Operation | | Low 7.7mA Operating Supply Current (50% duty cycle) | | Output Power Adjustable to >+13dBm | | Supports ASK with 90dBm Modulation Depth | | Uses Small Low-Cost XTAL |
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3.0 x 3.0 |
9 |
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Automotive - General |
$1.26 @1k |
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See All ISM RF Transmitters (13)
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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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| *At 50% duty cycle (315MHz, 2.7V supply, +13dBm output power) |
Diagram
 Typical Operating Circuit
Application Notes
Product Guides
Reliability Reports
| Show FIT data for: |
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| Request Reliability Report for: |
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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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| MAX7044AKA+
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Active |
SOT;8 pin;9 mm²
Outline Drawing:21-0078 (PDF)
Land Pattern: 90-0176 (PDF)
Use pkgcode/variation: K8SN+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX7044AKA+T
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Active |
SOT;8 pin;9 mm²
Outline Drawing:21-0078 (PDF)
Land Pattern: 90-0176 (PDF)
Use pkgcode/variation: K8SN+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX7044AKA-T
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Active |
SOT;8 pin;9 mm²
Outline Drawing:21-0078 (PDF)
Land Pattern: 90-0176 (PDF)
Use pkgcode/variation: K8SN-1*
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-40°C to +125°C
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RoHS/Lead-Free: No
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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Similar Products by Function
| MAX1473 |
315MHz/433MHz ASK Superheterodyne Receiver with Extended Dynamic Range |
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Similar Products by Application
Evaluation Kits
Products with Similar Part Numbers
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-3221
Rev 4;
2011-04-05
This page last modified: 2012-01-31
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