RX2A-433-64

EW N 24 August 2007 Radiometrix Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233 TX2H-4xx-64 UHF UHF High Power FM Transmitter The TX2H is a 433/434MHz single-channel FM transmitter module with a power output of 25mW nominal. It is a 100% pin-compatible drop-in replacement for the Radiometrix TX2 and can be used to replace the TX2 in applications where greater radiated power is desired (for example when space limitations dictate the use of small and inefficient antennas, or in countries where the extra power is permitted). The module will handle raw data rates up to 64kb/s. The TX2H transmitter can be used with either RX2 or RX2A receivers. Features • • • • • • • • Figure 1: TX2H-433-64-5V & RX2A-433-64 Standard frequencies: 433.92MHz and 434.42MHz Hi power drop in replacement for TX2 Data rates up to 64kbps Usable range over 500m Fully screened Low power requirements Conforms to European EN 301 489-3 and ETSI EN 300 220-3 (for ERP ≤10mW) Conforms to Australian/New Zealand AS/NZS 4268:2003 Instead of the SAW-based technology of the TX2, the TX2H uses a PLL circuit locked to a crystal for better frequency stability over a wider temperature range (-40C to +85C), at the expense of slightly slower power-up. The TX2H is available as standard on frequencies of 433.92MHz and 434.42MHz at 25mW power output, in either 3V(3.3V) or 5V versions. Custom frequencies may be available to order (consult factory). The module is designed to meet all applicable EMC and type approval requirements. The module can be made available if required in an extra-high-power version (TX2EH), in the same footprint and pinout but giving 90-100mW nominal output power at 5V supply with a current consumption of less than 45mA (DC to RF conversion efficiency better than 45%). Applications • • • • • • Handheld terminals Data loggers Industrial telemetry and telecommand In-building environmental monitoring and control High-end security and fire alarms Vehicle data up / download Technical Summary • • • • • • Size: 32 x 12 x 5.5mm Operating frequency: 433.92MHz and 434.42MHz Supply : 3V or 5V regulated Current consumption: 25mA typical Data bit rate: 64kbps max. Transmit power: +14dBm (25mW) nominal TX2H – Data Page - 1 - sales@radiometrix.com Functional description The TX2H transmitter module is a crystal based PLL controlled FM transmitter operating on either 3V or 5Vsupply and is available in 433.92MHz. R1 3 3V / 5V 868/915 MHz band pass filter 2 RF out amp buffer VCO ÷64 Loop Filter φ ref osc 35kHz LPF R2 5 TXD 1 RF GND 4 0V Figure. 2: TX2H block diagram User interface 32 mm 5.5 mm 12.0 mm Radiometrix TX2H UHF Transmitter 12.5 mm pin spacing: 2.54 mm 20.32 mm 1 2 3 4 5 PCB level 5 holes of 0.7 mm dia. pin spacing 2.54 mm 1 = RF gnd 2 = RF out 3 = Vcc 4 = 0V 5 = TXD Figure 3: TX2H pin-out and dimension TX2H pin 1 2 3 4 5 Name RFgnd RF out VCC 0V TXD Function RF ground, internally connected to the module screen and pin 4 (0V). This pin should be directly connected to the RF return path - e.g. coax braid, main PCB ground plane etc. 50Ω RF output to antenna. Internally DC-isolated. +ve supply pin. The module will generate RF when the Vcc supply is present. Max ripple content 0.1Vp-p. A 100nF de-coupling ceramic capacitor is suggested. DC supply ground. Internally connected to pin 1 and module screen. This DC coupled modulation input will accept either serial digital data ( 0 V to Vcc levels) or high level linear signals. Input impedance is 100 kΩ sales@radiometrix.com TX2H – Data Page - 2 - Preliminary Specifications (TX2H-433-64-5V): Figures apply at +25°C, 3.0V or 5.0V supply as applicable, unless otherwise stated. Operating temperature range Supply voltage (3V version) Supply voltage (5V version and TX2EH) Supply current Supply current (for TX2EH version) Output power Output power (for TX2EH version) DC to RF conversion efficiency (3V version) DC to RF conversion efficiency (5V version) DC to RF conversion efficiency (for TX2EH) Harmonics/spurious emissions Initial centre frequency accuracy Centre frequency variation over volts/temp FM deviation Power-up time (DC on to full RF output) Baseband bandwidth Maximum raw data rate Required TXD input levels -40°C to +85°C 2.5 - 3.5V (3.0V nominal, 4.0V absolute max.) 4.5 - 5.5V (5.0V nominal, 6.0V absolute max.) 25mA typical 45mA typical +14dBm (25mW), ±1dB +20dBm (100mW), ±1dB 33% approx. 20% approx. 45% approx.