RFM22B-868-D QUASAR, RFM22B-868-D Datasheet - Page 13

• Manufacturer Part Number: RFM22B-868-D
• Description: MODULE, TRANSCEIVER, 20DB, 868MHZ
• Manufacturer: QUASAR

Specifications of RFM22B-868-D

• Modulation Type: FSK, GFSK, OOK
• Data Rate Max: 256Kbps
• Sensitivity: -121dBm
• Supply Voltage Range: 1.8V To 3.6V
• Supply Current: 85mA
• Interface Type: SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.1. Operating Modes
The RFM22B/23B provides several operating modes which can be used to optimize the power consumption for a
given application. Depending upon the system communication protocol, an optimal trade-off between the radio
wake time and power consumption can be achieved.
Table 9 summarizes the operating modes of the RFM22B/23B. In general, any given operating mode may be
classified as an active mode or a power saving mode. The table indicates which block(s) are enabled (active) in
each corresponding mode. With the exception of the SHUTDOWN mode, all can be dynamically selected by
sending the appropriate commands over the SPI. An “X” in any cell means that, in the given mode of operation,
that block can be independently programmed to be either ON or OFF, without noticeably impacting the current
consumption. The SPI circuit block includes the SPI interface hardware and the device register space. The 32 kHz
OSC block includes the 32.768 kHz RC oscillator or 32.768 kHz crystal oscillator and wake-up timer. AUX
(Auxiliary Blocks) includes the temperature sensor, general purpose ADC, and low-battery detector.
*Note: Using RFM23B at +13 dBm using recommended reference design.
TRANSMIT
STANDBY
RECEIVE
SENSOR
TUNING
READY
DOWN
SLEEP
SHUT-
Name
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Mode
OFF (Register
contents lost)
ON (Register
Digital LDO
contents
retained)
Fax: [phone]
OFF
SPI
ON
ON
ON
ON
ON
ON
ON
32 kHz OSC
Table 9. Operating Modes
OFF
OFF
ON
X
X
X
X
X
Circuit Blocks
E-mail: [e-mail]
AUX
OFF
OFF
ON
X
X
X
X
X
30 MHz
XTAL
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
PLL
ON
ON
ON
RFM22B/23B
http://www.hoperf.com
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
PA
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
RX
18.5 mA
30 mA*
450 nA
800 µA
8.5 mA
15 nA
I
1 µA
1 µA
VDD
13