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300MHz–960MHz ASK and (G)FSK Transmitter with SPI Interface

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

Product Details

Parametric specs for ISM RF Transmitters < 1GHz
Band/ Freq. (MHz) 300 to 960
Tx Output Power (dBm) (max) 16
Modulation Mode (G)FSK
ASK
FSK
OOK
VSUPPLY (V) 1.8 to 3.6
Package/Pins UMAX/10
Budgetary
Price (See Notes)
0.92
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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
ASK
FSK
OOK
VSUPPLY (V) 1.8 to 3.6
Package/Pins UMAX/10
Budgetary
Price (See Notes)
0.92

Key Features

  • Low Implementation Cost
    • Bits-to-RF Single-Wire Operation
    • Low Bill-of-Materials (BoM)
    • Uses Single, Low-Cost, 16MHz Crystal
    • Small 3mm x 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
    • < 8mA ASK Manchester Coded
    • < 12mA (G)FSK or 2GFSK at 315MHz
    • Selectable Standby and Shutdown Modes
    • Auto Shutdown at < 20nA (typ) Current
  • Ease-of-Use
    • +1.8V to +3.6V Single-Supply Operation
    • Fully Programmable with SPI Interface
    • 400kHz/1MHz I2C Versions Also Available

Applications/Uses

  • Automatic Meter Reading (AMR)
  • Building Automation and Security
  • Garage Door Openers (GDO)
  • Internet of Things (IoT) Sensor Networks
  • Radio Control Toys
  • Remote Keyless Entry (RKE)
  • Tire Pressure Monitoring Systems (TPMS)

Description

The MAX41460 is a UHF sub-GHz ISM/SRD transmitter is designed to transmit On-Off Keying (OOK), Amplitude-Shift Keying (ASK), Frequency-Shift Keying (FSK), and 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 only frequency-dependent components required are for the external antenna-matching network.

The crystal-based architecture of the MAX41460 provides greater modulation depth, faster frequency settling, higher tolerance of the transmit frequency, and reduced temperature dependence.

The MAX41460 provides output power up to +13dBm into a 50Ω load while only drawing < 8mA for ASK (Manchester coded) and < 12mA for (G)FSK transmission 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.

The MAX41460 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 on data activity detection. A serial programmable interface make the MAX41460 compatible with almost any microcontroller or code-hopping generator.

The MAX41460 is available in a 10-pin µMAX package and is specified over the -40°C to +105°C extended temperature range. The MAX41460 has an ESD rating of 2.5kV HBM.

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

Simplified Block Diagram

MAX41460: Simplified Block Diagram MAX41460: 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 .