U s e r s M a n u a l Models A2500R24A and A2500R24C Contents Overview ..........................5 1.1. A2500R24A ........................5 1.2. A2500R24C ........................5 1.3. Features .......................... 6 1.4. Theory of Operation ......................6 1.4.1. Typical Flow ......................9 1.5.
A2500R24x – Users Manual Page 5 of 26 Release Date 01/10/11 1. Overview The A2500R24C and A2500R24A are surface mount modules with an integrated crystal, internal voltage regulator, matching circuitry and filtering. The A2500R24A has an integral antenna, whereas the A2500R24C utilizes an external antenna through a U.FL connector (see Table 1).
Page 6 of 26 A2500R24x – Users Manual Release Date 01/10/11 1.3. Features Features: Benefits Summary: • • Frequency range: 2400 – 2483.5 MHz Operating temperature -40 to +85C • • Ultra small package size 9mm x 12mm 100% RF Tested in production •...
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A2500R24x – Users Manual Page 7 of 26 Release Date 01/10/11 To transmit, a frame of data is placed in the FIFO; this may include a destination address. A transmit command is given, which will transmit the data according to the initial setup of the registers.
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Page 8 of 26 A2500R24x – Users Manual Release Date 01/10/11 Figure 1 The functionality of the A2500R24A, using an integral antenna Figure 2 The functionality of the A2500R24C, using an external antenna.
A2500R24x – Users Manual Page 9 of 26 Release Date 01/10/11 Figure 3 Transceiver IC block diagram. 1.4.1. Typical Flow After initial setup of registers for desired behavior, the normal operation flow diagram is shown in Figure 4. In applications of infrequent data transmissions the transceiver would be in “sleep”...
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Page 10 of 26 A2500R24x – Users Manual Release Date 01/10/11 Medium access Figure 4 Transceiver state diagram...
A2500R24x – Users Manual Page 11 of 26 Release Date 01/10/11 1.5. Applications Ultra low-power wireless applications, operating in the 2400-2483.5 MHz ISM/SRD bands. Wireless alarm and security systems Industrial monitoring and control Wireless sensor networks AMR – Automatic Meter Reading...
Page 12 of 26 A2500R24x – Users Manual Release Date 01/10/11 2. Product Approvals The A2500R24C and A2500R24A have been designed to meet most national regulations for world-wide ISM-band use. In particular the radio modules have been certified to the following standards.
A2500R24x – Users Manual Page 13 of 26 Release Date 01/10/11 Contains Transmitter Module FCC ID: X7J-A10030501 -or- Contains FCC ID: X7J-A10030501 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Page 14 of 26 A2500R24x – Users Manual Release Date 01/10/11 The following statement must be included as a CAUTION statement in manuals and OEM products to alert end users of FCC RF Exposure compliance: To satisfy FCC RF Exposure requirements for mobile and base station transmission devices, a separation distance of 20 cm or more should be maintained between the antenna of this device and persons during operation.
A2500R24x – Users Manual Page 15 of 26 Release Date 01/10/11 Label: Contains IC: 8975A-A10030501 From section 7.1.6, RSS-Gen, Issue 2, June 2007, Digital Circuits: If the device contains digital circuitry that is not directly associated with the radio transmitter, the device shall also have to comply with ICES-003, Class A or B as appropriate, except for ICES-003 labeling requirements.
Page 16 of 26 A2500R24x – Users Manual Release Date 01/10/11 2.4. Potential Interference Sources The radio modules operate in the unlicensed ISM band, in which there are many other ® applications e.g. WLAN, Bluetooth and microwave ovens. This can cause interference that may, in certain conditions, prohibit radio communication.
The user should use one of the register configurations listed below. Anaren provides register setting files for optimal performance and compliance for each of the data rates given in the following at www.anaren.com. 2.5.1. USA & Canada Within the USA and Canada, the modules have been approved for use as digitally modulated transmitters, for which they must have a minimum occupied bandwidth (6dB) of 500kHz.
Page 18 of 26 A2500R24x – Users Manual Release Date 01/10/11 antenna gain may not exceed 1W. The following table shows configurations that are compliant with this use and the expected performance. Requirement Suggested Expected Data Rate Deviation F0min F0max...
A2500R24x – Users Manual Page 19 of 26 Release Date 01/10/11 3. Electrical Characteristics 3.1. Absolute Maximum Ratings Under no circumstances must the absolute maximum ratings given in Table 2 be violated. Stress exceeding one or more of the limiting values may cause permanent damage to the device.
The A2500R24C and A2500R24A radio modules share a common pin-out and foot print, that is also shared by Anaren modules using other frequencies -- thus enabling easy changeover from one to another, e.g. if changing the frequency, antenna scheme, or adaptive antenna tuning is desired.
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A2500R24x – Users Manual Page 21 of 26 Release Date 01/10/11 No Connect, the pin is not connected internally, but is reserved for future expansion. It is recommended not to connect this pin to anything. No Connect, the pin is not connected internally, but is reserved for future expansion.
Page 22 of 26 A2500R24x – Users Manual Release Date 01/10/11 connect this pin to anything. Do Not Connect. Internal GND connection used during testing, not recommended to connect to main GND. Table 3 Pin Descriptions 3.4. Recommended Layout Figure 6 Recommended PCB layout.
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A2500R24x – Users Manual Page 23 of 26 Release Date 01/10/11 Figure 8 Mounting the module along an edge Figure 7 Mounting the module in a corner Figure 10 Mounting the module along an Figure 9 Mounting the module along an edge, with a ground plane cut-out.
Page 24 of 26 A2500R24x – Users Manual Release Date 01/10/11 3.5. Power Supply Considerations Noise on the power supply line reduces the sensitivity of a receiver and modulates onto a transmitters signal, both of which causes a degradation of link quality and hence a reduction in range.
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A2500R24x – Users Manual Page 25 of 26 Release Date 01/10/11 HISTORY Date Author Change Note No./Notes 05/31/10 Richardson Initial Draft 07/15/10 Richardson Initial Release 12/17/10 Richardson Formatting applied – no content change 01/10/11 Richardson Corrected typographic errors...
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Thank you for learning more about the Anaren Integrated Radio (AIR) module line. If you have additional questions, need samples, or would like a quote – please do not hesitate to email the AIR team AIR@anaren.com or contact any of these authorized distributors of the AIR product line.
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