Datasheet

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SX1272/73
WIRELESS, SENSING & TIMING DATASHEET
Rev. 2 - July 2014
©2014 Semtech Corporation
2.5. Chip Specification
The tables below give the electrical specifications of the transceiver under the following conditions: Supply voltage
VBAT1
= VBAT2 = VDD = 3.3 V, temperature = 25 °C, FXOSC = 32 MHz, F
RF
= 915 MHz, Pout = +13 dBm,
2
level FSK modulation without pre-filtering, FDA = 5 kHz, Bit Rate = 4.8 kbps and terminated in a matched 50 Ohm
impedance, unless otherwise specified. Shared Rx and Tx path matching.
Note Unless otherwise specified, the performance in the 868 MHz band is identical or better.
2.5.1. Power Consumption
Table 6 Power Consumption Specification
2.5.2. Frequency Synthesis
Table 7 Frequency Synthesizer Specification
Symbol Description Conditions Min Typ Max Unit
IDDSL Supply current in Sleep mode - 0.1 1 uA
IDDIDLE Supply current in Idle mode RC oscillator enabled - 1.5 - uA
IDDST Supply current in Standby mode Crystal oscillator enabled - 1.4 1.6 mA
IDDFS
Supply current in Synthesizer
mode
FSRx - 4.5 - mA
IDDR Supply current in Receive mode
LnaBoost Off
LnaBoost On
-
-
10.5
11.2
-
-
mA
IDDT
Supply current in Transmit mode
with impedance matching
RFOP = +20 dBm on PA_BOOST
RFOP = +17 dBm on PA_BOOST
RFOP = +13 dBm on RFO pin
RFOP = + 7 dBm on RFO pin
-
-
-
-
125
90
28
18
-
-
-
-
mA
mA
mA
mA
Symbol Description Conditions Min Typ Max Unit
FRF Synthesizer frequency range Programmable 860 - 1020 MHz
FXOSC Crystal oscillator frequency - 32 - MHz
TS_OSC Crystal oscillator wake-up time - 250 - us
TS_FS
Frequency synthesizer wake-up
time to PllLock signal
From Standby mode - 60 - us
TS_HOP
Frequency synthesizer hop time
at most 10 kHz away from the tar
-
get frequency
200 kHz step
1 MHz step
5 MHz step
7 MHz step
12 MHz step
20 MHz step
25 MHz step
-
-
-
-
-
-
-
20
20
50
50
50
50
50
-
-
-
-
-
-
-
us
us
us
us
us
us
us
FSTEP Frequency synthesizer step
FSTEP = FXOSC/2
19
- 61.0 - Hz
FRC RC Oscillator frequency After calibration - 62.5 - kHz