MRF39RA Datasheet, PDF (60/72 Pages) Microchip Technology – Low-Power, Integrated UHF Receiver

MRF39RA
7.4 Device Specification
The tables below give the electrical specifications of
the receiver under the following conditions:
• Supply voltage VBAT1 = VBAT2 = VDD = 3.3V
• Temperature = 25°C
• FXOSC = 32 MHz
• FRF = 915 MHz
• 2-level FSK modulation without pre-filtering
• Bit Rate = 4.8 kbps and terminated in a matched
50-Ohm impedance, unless otherwise specified.
Note:
Unless otherwise specified, the
performance in the other frequency bands
is similar or better.
7.4.1 POWER CONSUMPTION
Table 7-3 shows the power consumption specification.
TABLE 7-3: POWER CONSUMPTION SPECIFICATION
Symbol
Description
Conditions
Min. Typ. Max. Unit
IDDSL
IDDIDLE
IDDST
IDDFS
IDDR
Supply current in Sleep mode
Supply current in Idle mode
Supply current in Standby mode
Supply current in Synthesizer mode
Supply current in Receive mode
—
— 0.1
1 uA
RC oscillator enabled
— 1.2 — uA
Crystal oscillator enabled — 1.25 1.5 mA
—
—
9
— mA
—
— 16 — mA
7.4.2 FREQUENCY SYNTHESIS
Table 7-4 shows the frequency synthesizer specification.
TABLE 7-4: FREQUENCY SYNTHESIZER SPECIFICATION
Symbol
Description
Conditions
FR
Synthesizer frequency range Programmable
FXOSC
TS_OSC
TS_FS
TS_HOP
FSTEP
FRC
BRF
BRO
Crystal oscillator frequency
See Section 6.1 “Crystal Reso-
nator Specification”
Crystal oscillator wake-up time
Frequency synthesizer
wake-up time to PllLock signal
Frequency synthesizer hop
time at most 10 kHz away from
the target
From Standby mode
200 kHz step
1 MHz step
5 MHz step
7 MHz step
12 MHz step
20 MHz step
25 MHz step
Frequency synthesizer step
RC Oscillator frequency
Bit rate, FSK
Bit rate, OOK
FSTEP = FXOSC/2¹⁹
After calibration
Programmable
Programmable
Min.
290
424
862
—
Typ.
—
—
—
32
Max.
340
510
1020
—
Unit
MHz
MHz
MHz
MHz
— 250
— 80
500 µs
150 µs
— 20
— 20
— 50
— 50
— 80
— 80
— 80
— µs
— µs
— µs
— µs
— µs
— µs
— µs
— 61.0
— Hz
— 62.5
— kHz
1.2 —
300 kbps
1.2 — 32.768 kbps
DS40001778B-page 60
 2015 Microchip Technology Inc.