Radiometrix RX Module 434.650 MHZ, 10KB

The NTX2 transmitter and NRX2 receiver offer a low power, reliable data link in a Radiometrix SIL standard pin out and foot print. This makes the NTX2/NRX2 pair ideally suited to those low power applications where existing single frequency wideband UHF modules have insufficient range.

The NRX2 module is a double conversion NBFM superhet receiver capable of handling data rates of up to 10kbps. It will operate from a supply of 2.9V to 15V and draws 14mA when receiving. A signal strength (RSSI) output with greater than 60dB of range is provided. The SIL style NRX2 measures 47 x 17 x 8 mm excluding the pins.

The NTX2 & NRX2 modules combine effective screening with internal filtering to minimize spurious radiation and susceptibility thereby ensuring EMC compliance. They can be used in existing low data rate (<10kbps) applications where the operating range of the system using TX2 transmitter and RX2 receiver need to be extended. They are particularly suitable for point-to-point and point-to-multi-point wireless links where longer ranges are required at low data rates. Applications include sensor nodes, EPOS and inventory tracking, remote industrial process monitoring, telemetry, telecommand and telecontrol. Because of their small size and low power consumption, both modules are ideal for use in battery-powered portable applications such as handheld terminals.

Quick Spec

• Conforms to ETSI EN 300 220-3 (radio) and EN 301 489-3 (EMC)
• Standard frequencies: 434.075MHz, 434.650MHz and 458.700MHz
• Data rates up to 10kbps
• Usable range over 500m
• 25kHz Channel spacing
• Feature-rich interface (RSSI, analogue and digital baseband)
• Longer range compared to Wide Band FM modules

Pinout & Dimensions

Pin Description

1. RF in - 50Ω RF input from the antenna
2. RF GND - RF Ground is internally connected to the module screen and pin 4 (0V). These pins should be directly connected to the RF return path - e.g. coax braid, main PCB ground plane etc
3. RSSI - Received Signal Strength Indicator with >60dB range.DC level between 0.5V and 2V
4. 0V - Ground
5. Vcc - 2.9 - 15V DC power supply
6. AF - 500mVpk-pk audio. DC coupled, approx 0.8V bias
7. RXD - Received Data output from the internal data slicer. The data is squared version of the Audio signal on pin 6 and is true data, i.e. as fed to the transmitter. Output is "open-collector" format with internal 10kΩpull-up to Vcc (pin 5). Suitable for bi-phase codes

Technical Summery

• Double conversion FM superhet
• SAW band pass filter, image rejection: 50dB
• Intermediate Frequencies (IF): 21.4MHz, 455kHz
• Supply range: 2.9V - 15V @ 14mA (internal 2.8V voltage regulator)
• Data bit rate: 10kbps max.
• Receiver sensitivity: -118dBm (for 12dB SINAD)
• Receiver sensitivity: -112dBm (for 1ppm BER)
• Local Oscillator (LO) re-radiation: <-60dBm
• Adjacent Channel: -70dBm
• Blocking: -84dB

Absolute Ratings

• Vcc, RXD (pins 7,9): -0.3V to +16.0V
• En, RSSI, AF (pins 4,5,8): -0.3V to +Vcc V
• RF in (pin 1): *50V @ <10MHz, +13dBm @ >10MHz

Code

Resources

• Product Page

Shipping List

• 1 x Radiometrix RX Module 434.650 MHZ, 10KB