AT86RF232 Atmel Corporation, AT86RF232 Datasheet - Page 10

• Manufacturer Part Number: AT86RF232
• Manufacturer: Atmel Corporation

Specifications of AT86RF232

• Max. Operating Frequency: 0 MHz
• Crypto Engine: AES
• Operating Voltage (vcc): 1.8 to 3.6
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 0.25
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3
• Receiver Sensitivity (dbm): -100
• Receive Current Consumption (ma): 11.8
• Transmit Current Consumption (ma): 13.8
• Link Budget (dbm): 103

5.1 Basic Application Schematic
5 Application Circuits
10
AT86RF232
A basic application schematic of the Atmel AT86RF232 with a single-ended RF
connector is shown in
100Ω differential RF port impedance using balun B1. The capacitors C1 and C2 provide
AC coupling of the RF input to the RF port, optional capacitor C4 improves matching if
required.
Figure 5-1. Basic Application Schematic.
The power supply decoupling capacitors (CB2, CB4) are connected to the external
analog supply pin 28 (EVDD) and external digital supply pin 15 (DEVDD). Capacitors
CB1 and CB3 are bypass capacitors for the integrated analog and digital voltage
regulators to ensure stable operation. All decoupling and bypass capacitors should be
placed as close as possible to the pins and should have a low-resistance and low-
inductance connection to ground to achieve the best performance.
The crystal (XTAL), the two load capacitors (CX1, CX2), and the internal circuitry
connected to pins XTAL1 and XTAL2 form the crystal oscillator. To achieve the best
accuracy and stability of the reference frequency, large parasitic capacitances should
be avoided. Crystal lines should be routed as short as possible and not in proximity of
digital I/O signals.
RF
C4
B1
C1
C2
Figure
1
2
3
4
5
6
7
8
AVSS
AVSS
AVSS
RFP
RFN
AVSS
DVSS
/RST
5-1. The 50Ω single-ended RF input is transformed to the
32
9
31
10 11 12 13 14 15 16
V
DD
30
CB1
AT86RF232
CB2
29
28
CB3
CX1
27
26
CB4
XTAL
25
CLKM
DVSS
DVSS
SCLK
MOSI
MISO
/SEL
IRQ
V
24
23
22
21
20
19
18
17
DD
CX2
8321A–MCU Wireless–10/11
C3
R1