300MHz–960MHz ASK Transmitter with I2C Interface

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



The MAX41461/MAX41462 is a UHF sub-GHz ISM/SRD transmitter is designed to transmit On-Off Keying (OOK) or Amplitude-Shift Keying (ASK) data in the 286MHz to 960MHz frequency range. It integrates a fractional phase-locked-loop (PLL), so 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 external microcontroller interface. The only frequency-dependent components required are for the external antenna matching network. Optionally, the device can be put into programmable mode and programmed using an I2C interface. The crystal-based architecture of the MAX41461/MAX41462 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. A clock-out signal at 800kHz is also provided.

The MAX41461/MAX41462 provides output power up to +13dBm into a 50Ω load while drawing < 8mA (Manchester coded). 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 MAX41461/MAX41462 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 MAX41461/MAX41462 is available in a 10-pin μMAX package and is specified over the -40°C to +105°C extended temperature range. The MAX41461/MAX41462 has an ESD rating of 2.5kV HBM.

MAX41461, MAX41462: Simplified Block Diagram MAX41461, MAX41462: TSimplified Block Diagram 放大+


  • 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
    • Selectable Standby and Shutdown Modes
    • Auto Shutdown at < 20nA (typ) Current
  • Ease of Use
    • Pin Selectable 300MHz–928MHz Frequencies
    • Pin Compatible ASK and FSK Versions
    • +1.8V to +3.6V Single-Supply Operation
    • Fully Programmable with 400kHz/1MHz I2C Interface


  • 自动抄表(AMR)
  • 楼宇自动化和安保
  • 车库开门器(GDO)
  • 物联网(IoT)
  • 无线遥控玩具
  • 遥控和无源无钥匙进入(RKE/PKE)
  • 胎压监测系统(TPMS)
  • 无线传感器和报警器
Part NumberSolutionsApplicationsBand/ Freq.
(mm x mm)
See Notes
MAX41461 300 to 960MHz ISM RF
Garage Door Openers
Home Automation
ISM (Europe)
RF Remote Controls
Security Systems
300 to 9603.0 x 3.0
$0.65 @1k
$0.66 @1k
查看所有ISM RF Transmitters (15)
Pricing Notes:

MAX41460EVKIT: MAX41460/MAX41463/MAX41464评估板
MAX41461EVKIT-315: MAX41460/MAX41463/MAX41464评估板
MAX41462EVKIT-434: MAX41460/MAX41463/MAX41464评估板
MAX41463EVKIT-915: MAX41460/MAX41463/MAX41464评估板


应用笔记 3587 FCC和ETSI对ASK调制、短距离UHF发送器的要求


申请可靠性报告: MAX41461 

CAD Symbols and Footprints

  • MAX41461GUB+
  • MAX41461GUB+T
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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    类型 编号 标题
    评估板10044MAX41461EVKIT-315 MAX41460/MAX41463/MAX41464评估板
    评估板10044MAX41463EVKIT-915 MAX41460/MAX41463/MAX41464评估板
    评估板10044MAX41462EVKIT-434 MAX41460/MAX41463/MAX41464评估板
    评估板10044MAX41460EVKIT MAX41460/MAX41463/MAX41464评估板