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300MHz–960MHz (G)FSK Transmitter with I2C Interface

High Output Power for Long Range, with Low Current Consumption - Fully Programmable at a Low Implementation Cost

Product Details

Key Features

Applications/Uses

Parametric specs for ISM RF Transmitters < 1GHz
Band/ Freq. (MHz) 300 to 960
Tx Output Power (dBm) (max) 16
Modulation Mode (G)FSK
FSK
VSUPPLY (V) 1.8 to 3.6
Package/Pins UMAX/10
Budgetary
Price (See Notes)
0.73
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Simplified Block Diagram

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Parameters

Parametric specs for ISM RF Transmitters < 1GHz
Band/ Freq. (MHz) 300 to 960
Tx Output Power (dBm) (max) 16
Modulation Mode (G)FSK
FSK
VSUPPLY (V) 1.8 to 3.6
Package/Pins UMAX/10
Budgetary
Price (See Notes)
0.73

Key Features

  • Low Implementation Cost
    • Bits-to-RF Single Wire Operation
    • Low Bill-of-Materials (BOM)
    • Uses Single, Low-Cost, 16MHz Crystal
    • Small 3mm × 3mm µMAX-10 Package
  • Increased Range, Data Rates, and Security
    • Up to +16dBm PA Output Power
    • Fast Frequency Switching for FHSS/DSSS
    • Fast-On Oscillator: <250µs Startup Time
    • Up to 200kbps NRZ Data Rate
  • Extend Battery Life with Low Supply Current
    • < 12mA Typical Current Consumption at 315MHz
    • Selectable Standby and Shutdown Modes
    • Auto Shutdown at < 20nA (typ) Current
  • Ease-of-Use
    • Pin-Selectable Frequencies
    • Pin-Compatible ASK and FSK Versions
    • +1.8V to +3.6V Single-Supply Operation
    • Fully Programmable with 400kHz/1MHz I2C Interface

Applications/Uses

  • Automatic Meter Reading (AMR)
  • Building Automation and Security
  • Garage Door Openers (GDO)
  • Internet of Things (IoT)
  • Radio Control Toys
  • Remote and Passive Keyless Entry (RKE/PKE)
  • Tire Pressure Monitoring Systems (TPMS)
  • Wireless Sensors and Alarms

Description

The MAX41463/MAX41464 is a UHF sub-GHz ISM/SRD transmitter designed to transmit Frequency-Shift Keying (FSK), or Gaussian (G)FSK (or 2GFSK) data in the 286MHz to 960MHz frequency range. It integrates a fractional phase-locked-loop (PLL) so that a single, low-cost crystal can be used to generate commonly used world-wide sub-GHz frequencies. The fast response time of the PLL allows for frequency-hopping spread spectrum protocols for increased range and security. The chip also features preset modes with pin-selectable frequencies so that only one wire is required for an external microcontroller interface. The only frequency-dependent components required are for the external antenna-matching network. A buffered clock-out signal at 800kHz is also provided. Optionally, the device can be put into programmable mode and programmed using an I2C interface. The crystal-based architecture of the MAX41463/MAX41464 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 MAX41463/MAX41464 provides output power up to +13dBm into a 50Ω load while drawing < 12mA at 315MHz. The output load can be adjusted to increase power up to +16dBm, and a PA boost mode can be enabled at frequencies above 850MHz to compensate for losses. The PA output power can also be controlled using programmable register settings in I2C mode.

The MAX41463/MAX41464 also features single-supply operation from +1.8V to +3.6V. The device has an auto-shutdown feature to extend battery life and a fast oscillator wake-up with data activity detection.

The MAX41463/MAX41464 is available in a 10-pin µMAX package and is specified over the −40℃ to +105℃ extended temperature range.

Design Solution: How to Maximize the Wireless Power Range of Your UHF Sub-GHz Short-Range Device ›

Simplified Block Diagram

MAX41463, MAX41464: Simplified Block Diagram MAX41463, MAX41464: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .