ADF7025 데이터 시트보기 (PDF) - Analog Devices
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ADF7025 Datasheet PDF : 44 Pages
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ADF7025
SPECIFICATIONS
VDD = 2.3 V to 3.6 V, GND = 0 V, TA = TMIN to TMAX, unless otherwise noted. Typical specifications are at VDD = 3 V, TA = 25°C.
All measurements are performed using the EVAL-ADF7025DB1 using PN9 data sequence, unless otherwise noted.
Table 1.
Parameter
RF CHARACTERISTICS
Frequency Ranges (Direct Output)
Frequency Ranges (Divide-by-2 Mode)
Phase Frequency Detector Frequency
TRANSMISSION PARAMETERS
Data Rate
FSK
FSK Frequency Deviation
Deviation Frequency Resolution
Gaussian Filter BT
Transmit Power1
Transmit Power Variation vs. Temperature
Transmit Power Variation vs. VDD
Transmit Power Flatness
Programmable Step Size
−20 dBm to +13 dBm
Spurious Emissions
Integer Boundary
Reference
Harmonics
Second Harmonic
Third Harmonic
All Other Harmonics
VCO Frequency Pulling
Optimum PA Load Impedance
Min
862
902
431
RF/256
9.6
100
100
100
221
−20
RECEIVER PARAMETERS
FSK Input Sensitivity
Sensitivity at 38.4 kbps
Sensitivity at 172.8 kbps
Sensitivity at 384 kbps
Baseband Filter (Low-Pass) Bandwidths
LNA and Mixer, Input IP3
Enhanced Linearity Mode
Low Current Mode
High Sensitivity Mode
Rx Spurious Emissions3
Typ
Max Unit
Test Conditions
870
MHz
928
464
MHz
24
MHz
VCO adjust = 0, VCO bias = 10
VCO adjust = 3, VCO bias = 12
See conditions for direct output
384
kbps
311.89 kHz
PFD = 10 MHz, direct output
748.54 kHz
PFD = 24 MHz, direct output
374.27 kHz
PFD =24MHz, divide-by-2 mode
Hz
PFD = 3.625 MHz
0.5
+13
dBm
VDD = 3.0 V, TA = 25°C
±1
dB
From −40°C to +85°C
±1
dB
From 2.3 V to 3.6 V at 915 MHz, TA = 25°C
±1
dB
From 902 MHz to 928 MHz, 3 V, TA = 25°C
0.3125
dB
−55
dBc
50 kHz loop B/W
−65
dBc
−27
−21
−35
30
39 + j61
48 + j54
54 + j94
dBc
dBc
dBc
kHz rms
Ω
Ω
Ω
Unfiltered conductive
DR = 9.6 kbps
FRF = 915 MHz
FRF = 868 MHz
FRF = 433 MHz
−104.2
−100
−95.8
±300
±450
±600
At BER = 1E − 3, FRF = 915 MHz,
LNA and PA matched separately2
dBm
FDEV = 200 kHz, LPF B/W = ±300kHz
dBm
FDEV = 200 kHz, LPF B/W = ±450kHz
dBm
FDEV = 450kHz, LPF B/W = ±600kHz
Programmable
kHz
kHz
kHz
+6.8
dBm
Pin = −20 dBm, 2 CW interferers
−3.2
dBm
FRF = 915 MHz, f1 = FRF + 3 MHz
−35
dBm
F2 = FRF + 6 MHz, maximum gain
−57
dBm
<1 GHz at antenna input
−47
dBm
>1 GHz at antenna input
Rev. A | Page 4 of 44
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