XR18W753IL48-F Exar Corporation, XR18W753IL48-F Datasheet - Page 18

• Manufacturer Part Number: XR18W753IL48-F
• Description: IC RF TXRX 868-956MHZ 48QFN
• Manufacturer: Exar Corporation
• Type: RF Receiversr
• Series: -r

Specifications of XR18W753IL48-F

• Package / Case: 48-VFQFN Exposed Pad
• Frequency: 868MHz ~ 954MHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: DSSS
• Applications: ISM
• Power - Output: 0dBm
• Sensitivity: -94dBm
• Voltage - Supply: 2.2 V ~ 3.6 V
• Current - Receiving: 19mA
• Current - Transmitting: 22mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 100 KHz, 400 KHz
• Operating Supply Voltage: 2.2 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Noise Figure: 12 dB
• Supply Current: 0.5 mA, 1.7 mA, 19 mA, 22 mA
• Data Rate: 250Kbps
• Rf Ic Case Style: QFN
• No. Of Pins: 48
• Supply Voltage Range: 2.97V To 3.63V
• Operating Temperature Range: -40°C To +85°C
• Memory Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

XR18W753
SINGLE CHIP 868MHZ TO 956MHZ RF TRANSCEIVER
3.2 DETAILED REGISTERS DESCRIPTIONS
A
0x27
0x28
0x29
0x2A-0x2D
0x2E
0x2F - 0x30 RSSI_ACT_VALUE_0,1
0x31-0x4F
0x50
DDRESS
REGISTER NAME
AGC_ACT_VALUE
Reserved
SLICER_LEVEL
Reserved
ED_THRES
Reserved
TEST_0
AGC setting instantaneous value
DESCRIPTION
b[3:0] = 0000 --> IF-AGC set to 0dB
b[3:0] = 0001 --> IF-AGC set to -6dB
b[3:0] = 0010 --> IF-AGC set to -12dB
b[3:0] = 0011 --> IF-AGC set to -18dB
b[3:0] = 0100 --> IF-AGC set to -24dB
b[3:0] = 0101 --> IF-AGC set to -30dB
b[3:0] = 0110 --> IF-AGC set to -36dB
b[3:0] = 0111 --> IF-AGC set to -42dB
b[3:0] = 1000 --> IF-AGC set to -48dB
b[3:0] = 1001 --> not used
b[3:0] = 1010 --> not used
b[3:0] = 1011 --> not used
b[3:0] = 1100 --> not used
b[3:0] = 1101 --> not used
b[3:0] = 1110 --> not used
b[3:0] = 1111 --> not used
b[7:4] not used
Frequency offset in a link can be read out via this register. The
value is interpreted as an 8-bit two’s complement value (-128 to
+127). The conversion from this value to frequency is given below.
For 902 - 928 MHz application, the frequency offset is:
f
For 868 MHz application, the frequency offset is:
f
Energy detection threshold
In IEE802.15.4 specification, it has been defined how the result of
the ED measurement given in MODEM_ED (0x15) need to be
reported. The value of ED_THRES is used to align the receiver
with the IEE802.15.4 ED measurement specification.
Actual RSSI value_0, 1
The instantaneous level to the digital demodulator can be read via
these two registers. The value is interpreted as a two’s comple-
ment number. Together with the information of AGC_ACT_VALUE
(0x27), the instantaneous RF level can be calculated.
This register is used for factory test modes. For normal operation,
initialize this register to 0xD1.
offset
offset
= 1MHz x SLICER_LEVEL / 128
= 400 kHz x SLICER_LEVEL / 128
18
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-
-
REV. 1.0.0
T
R/W
R/W
YPE
R
R
R
-
-
-