Control Technology 52201 Low Cost Low Power 2.4 GHz RF Transceiver User Manual

The CC2500 is a low-cost 2.4 GHz transceiver designed for very low-power wireless applications within the 2400-2483.5 MHz frequency range. It is controlled via an SPI interface and is typically used with a microcontroller and additional passive components. The RF transceiver includes a highly configurable baseband modem supporting various modulation formats with a data rate of up to 500 kBaud.

Features:

Hardware support for packet handling

Data buffering
Burst transmissions

Clear channel assessment (CCA)
Link quality indication (LQI)

Wake-on-radio feature

FAQ

Q: What frequency range does the CC2500 support?
- A: The CC2500 supports the 2400-2483.5 MHz ISM/SRD band systems.
Q: What modulation formats are supported by the baseband modem?
- A: The modem supports various modulation formats for flexible communication.
Q: How is the CC2500 powered?
- A: The CC2500 operates on a voltage of 3.3V.

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Applications

 2400-2483.5 MHz ISM/SRD band systems
 Consumer electronics
 Wireless game controllers
 Wireless audio
 Wireless keyboard and mouse
 RF enabled remote controls

Product Description

The CC2500 is a low-cost 2.4 GHz transceiver designed for very low-power wireless applications. The circuit is intended for the 2400- 2483.5 MHz ISM (Industrial, Scientific and Medical) and SRD (Short Range Device) frequency band.
The RF transceiver is integrated with a highly configurable baseband modem. The modem supports various modulation formats and has a configurable data rate up to 500 kBaud.

CC2500 provides extensive hardware support for packet handling, data buffering, burst transmissions, clear channel assessment, link quality indication, and wake-on-radio. The main operating parameters and the 64- byte transmit/receive FIFOs of CC2500 can be controlled via an SPI interface. In a typical system, the CC2500 will be used together with a microcontroller and a few additional passive components.

Features

Key Features

RF Performance

 High sensitivity (–104 dBm at 2.4 kBaud, 1% packet error rate)
 Low current consumption (13.3 mA in RX, 250 kBaud, input well above sensitivity limit)
 Programmable output power up to +1 dBm
 Excellent receiver selectivity and blocking performance
 Programmable data rate from 1.2 to 500 kBaud
 Frequency range: 2400 – 2483.5 MHz

Analog Features

 OOK, 2-FSK, GFSK, and MSK supported
 Suitable for frequency hopping and multichannel systems due to a fast settling frequency synthesizer with 90 us settling time
 Automatic Frequency Compensation (AFC) can be used to align the frequency synthesizer to the received centre frequency
 Integrated analog temperature sensor

Digital Features

 Flexible support for packet oriented systems: On-chip support for sync word detection, address check, flexible packet length, and automatic CRC handling
 Efficient SPI interface: All registers can be programmed with one “burst” transfer
 Digital RSSI output
 Programmable channel filter bandwidth
 Programmable Carrier Sense (CS) indicator
 Programmable Preamble Quality Indicator (PQI) for improved protection against false sync word detection in random noise
 Support for automatic Clear Channel Assessment (CCA) before transmitting (for listen-before-talk systems)
 Support for per-package Link Quality Indication (LQI)
 Optional automatic whitening and dewhitening of data

Low-Power Features

 400 nA SLEEP mode current consumption
 Fast startup time: 240 us from SLEEP to RX or TX mode (measured on EM design)
 Wake-on-radio functionality for automatic low-power RX polling
 Separate 64-byte RX and TX data FIFOs (enables burst mode data transmission)

General

 Few external components: Complete onchip frequency synthesizer, no external filters or RF switch needed
 Green package: RoHS compliant and no antimony or bromine
 Small size (QLP 4×4 mm package, 20 pins)
 Suited for systems compliant with EN 300 328 and EN 300 440 class 2 (Europe),\ FCC CFR47 Part 15 (US), and ARIB STDT66 (Japan)
 Support for asynchronous and synchronous serial receive/transmit mode for backwards compatibility with existing radio communication protocols

Specifications

Absolute Maximum Ratings

Under no circumstances must the absolute maximum ratings given in Table 1 be violated. Stress exceeding one or more of the limiting values may cause permanent damage to the device.

Caution! ESD sensitive device.
Precaution should be used when handling the device in order to prevent permanent damage.

Electrical Specifications

4.1 Current Consumption

Tc = 25C, VDD = 3.0 V if nothing else stated. All measurement results obtained using the CC2500EM reference design ([4]).

Parameter / Min / Typ / Max / Unit / Condition/Note

Current consumption in power down modes

400 nA Voltage regulator to digital part off, register values retained
(SLEEP state). All GDO pins programmed to 0x2F (HW to 0)
900 nA Voltage regulator to digital part off, register values retained, lowpower RC oscillator running (SLEEP state with WOR enabled)
92 A Voltage regulator to digital part off, register values retained,
XOSC running (SLEEP state with MCSM0.OSC_FORCE_ON set)
160 A Voltage regulator to digital part on, all other modules in power
down (XOFF state)

Pin Configuration

Note: The exposed die attach pad must be connected to a solid ground plane as this is the main ground connection for the chip.

Circuit Description

A simplified block diagram of CC2500 is shown in Figure 2. CC2500 features a low-IF receiver. The received RF signal is amplified by the lownoise amplifier (LNA) and down-converted in quadrature (I and Q) to the intermediate frequency (IF). At IF, the I/Q signals are digitised by the ADCs. Automatic gain control (AGC), fine channel filtering, demodulation bit/packet synchronization are performed digitally.

The transmitter part of CC2500 is based on direct synthesis of the RF frequency. The frequency synthesizer includes a completely on-chip LC VCO and a 90 degrees phase shifter for generating the I and Q LO signals to the down-conversion mixers in receive mode.

A crystal is to be connected to XOSC_Q1 and XOSC_Q2. The crystal oscillator generates the reference frequency for the synthesizer, as well as clocks for the ADC and the digital part. A 4-wire SPI serial interface is used for configuration and data buffer access. The digital baseband includes support for channel configuration, packet handling, and data buffering.

PACKAGING INFORMATION

(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) RoHS: TI defines “RoHS” to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, “RoHS” products are suitable for use in specified lead-free processes. TI may reference these types of products as “Pb-Free”.
RoHS Exempt: TI defines “RoHS Exempt” to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines “Green” to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. – The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a “~” will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead finish/Ball material – Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two lines if the finish value exceeds the maximum column width.

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Documents / Resources

Control Technology 52201 Low Cost Low Power 2.4 GHz RF Transceiver [pdf] User Manual
522PPPCDE0RB, 52201 Low Cost Low Power 2.4 GHz RF Transceiver, 52201, Low Cost Low Power 2.4 GHz RF Transceiver, Low Power 2.4 GHz RF Transceiver, 2.4 GHz RF Transceiver, RF Transceiver, Transceiver

References

User Manual

Control Technology 52201 Low Cost Low Power 2.4 GHz RF Transceiver

Product Usage Instructions

FAQ