AT86RF231-ZUR Atmel, AT86RF231-ZUR Datasheet - Page 116

• Manufacturer Part Number: AT86RF231-ZUR
• Description: IC RADIO TXRX 2.4GHZ 32-VQFN
• Manufacturer: Atmel

Specifications of AT86RF231-ZUR

• Frequency: 2.4GHz
• Data Rate - Maximum: 2Mbps
• Modulation Or Protocol: 802.15.4 Zigbee, 6LoWPAN, RF4CE, SP100, WirelessHART™, ISM
• Applications: Industrial Monitoring and Control, Wireless Alarm and Security Systems
• Power - Output: -17dBm ~ 3dBm
• Sensitivity: -101dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 12.3mA
• Current - Transmitting: 14mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 2405 MHz to 2480 MHz
• Interface Type: SPI
• Noise Figure: 6 dB
• Output Power: 20 dB
• Operating Supply Voltage: 2.5 V, 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 12.3 mA
• Minimum Operating Temperature: - 40 C
• Modulation: OQPSK
• Protocol Supported: 802.15.4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

9.6
9.6.1
9.6.2
8111C–MCU Wireless–09/09
Crystal Oscillator (XOSC)
Overview
Integrated Oscillator Setup
The main crystal oscillator features are:
The crystal oscillator generates the reference frequency for the AT86RF231. All other internally
generated frequencies of the radio transceiver are derived from this unique frequency. There-
fore, the overall system performance is mainly determined by the accuracy of crystal reference
frequency. The external components of the crystal oscillator should be selected carefully and the
related board layout should be done with caution (see
12).
The register 0x12 (XOSC_CTRL) provides access to the control signals of the oscillator. Two
operating modes are supported. It is recommended to use the integrated oscillator setup as
described in
nal circuitry by using an external clock reference as shown in
Using the internal oscillator, the oscillation frequency depends on the load capacitance between
the crystal pins XTAL1 and XTAL2. The total load capacitance C
load capacitance of the crystal itself. It consists of the external capacitors CX and parasitic
capacitances connected to the XTAL nodes.
Figure 9-7 on page 116
the pin input capacitance, summarized to C
Figure 9-7.
Additional internal trimming capacitors C
4.5 pF with a 0.3 pF resolution is selectable using XTAL_TRIM of register 0x12 (XOSC_CTRL).
• 16 MHz amplitude controlled crystal oscillator
• 330 µs typical settling time after leaving SLEEP state
• Configurable trimming capacitance array
• Configurable clock output (CLKM)
Figure 9-7 on page
Simplified XOSC Schematic with External Components
EVDD
XTAL_TRIM[3:0]
shows all parasitic capacitances, such as PCB stray capacitances and
V
DD
C
TRIM
116; nevertheless a reference frequency can be fed to the inter-
XTAL1
C
PAR
TRIM
PAR
CX
EVDD
are available. Any value in the range from 0 pF to
.
16MHz
Section 5. “Application Circuits” on page
XTAL2
CX
XTAL_TRIM[3:0]
Figure 9-8 on page
L
AT86RF231
must be equal to the specified
C
TRIM
C
PAR
PCB
AT86RF231
117.
116