SX1239IMLTRT Semtech, SX1239IMLTRT Datasheet - Page 70

• Manufacturer Part Number: SX1239IMLTRT
• Description: IC, RF RECEIVER, 1.02GHz, QFN-24
• Manufacturer: Semtech

Specifications of SX1239IMLTRT

• Applications: Wireless Sensor Networks, Automated Meter Reading, Home And Building Automation
• Receiving Current: 16mA
• Data Rate: 300Kbps
• Modulation Type: FSK, OOK
• Sensitivity Dbm: -120dBm
• Rohs Compliant: Yes
• Rf Ic Case Style: QFN
• No. Of Pins: 24
• Sensitivity (dbm): -120dBm
• Supply Voltage Range: 1.8V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Lead Free Status / Rohs Status: Supplier Unconfirmed

9. Chip Revisions
Three distinct chip populations exist and can be identified as follows:
Table 27 Chip Identification
This document describes the behavior and characteristics of the SX1239 V2c. Minor differences can be observed between
the three versions, and they are listed in the following sub sections.
9.1. RC Oscillator Calibration
On the SX1239 V2a, RC calibration at power-up needs to be performed according to the following routine:
This is not required in the version V2b any more, where the calibration is fully automatic.
9.2. Listen Mode
9.2.1. Resolutions
On the SX1239 V2a, the Listen mode resolutions were identical for the Idle phase and the Rx phase. They are now
independently configurable, adding flexibility in the setup of the Listen mode.
Rev 3 - Jan 2011
ADVANCED COMMUNICATIONS & SENSING
Chip
Version
V2a
V2b
V2c
/////// RC CALIBRATION (Once at POR) ///////
SetRFMode(RF_STANDBY);
WriteRegister(0x57, 0x80);
WriteRegister(REG_OSC1, ReadRegister(REG_OSC1) | 0x80);
while (ReadRegister(REG_OSC1) & 0x40 == 0x00);
WriteRegister(REG_OSC1, ReadRegister(REG_OSC1) | 0x80);
while (ReadRegister(REG_OSC1) & 0x40 == 0x00);
WriteRegister(0x57, 0x00);
////////////////////////////////////////////
Register Value
@ address 0x10
0x21
0x22
0x23
Figure 40.
Figure 41. Listen Mode Resolution, V2b
Lot Codes
(see Figure 3)
W0K976.00
W6A114.0A ¦ W0N382.00
W0N386.00 ¦ W0P051.00
W0S934.01 and all others
Listen Mode Resolutions, V2a
Page 70
Comment
Limited supply
Limited supply
Running production
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SX1239