Analog Devices ADF7021-V Manual page 8

ADF7021-V
Parameter
IMAGE CHANNEL REJECTION
868 MHz
460 MHz
BLOCKING
±1 MHz
±2 MHz
±5 MHz
±10 MHz
SATURATION (MAXIMUM
INPUT LEVEL)
RECEIVED SIGNAL STRENGTH
INDICATION (RSSI)
4
Input Power Range
Linearity
Absolute Accuracy
Response Time
AUTOMATIC FREQUENCY LOOP
(AFC)
Pull-In Range, Minimum
Pull-In Range, Maximum
Response Time
Accuracy
5
Rx SPURIOUS EMISSIONS
External 920 MHz VCO
External 920 MHz VCO
External 1738 MHz VCO
External 1738 MHz VCO
LNA INPUT IMPEDANCE
f = 915 MHz
RF
f = 868 MHz
RF
f = 470 MHz
RF
f = 450 MHz
RF
f = 426 MHz
RF
f = 315 MHz
RF
f = 175 MHz
RF
f = 169 MHz
RF
1 Using Gaussian or raised cosine filtering. The frequency deviation should be chosen to ensure that the transmit-occupied signal bandwidth is within the receiver
IF filter bandwidth.
2
4FSK f is defined as the frequency spacing from the RF carrier to +f
DEV
3 Calibration of the image rejection used an external RF source.
4
For received signal levels < −100 dBm, it is recommended that the RSSI readback value be averaged over a number of samples to improve RSSI accuracy at low input power.
5
Filtered conductive receive spurious emissions are measured on the EVAL-ADF7021-VDBxZ, which includes a T-stage harmonic filter (two inductors and one capacitor).
Min Typ Max
26/39
29/50
−29.5
−26.5
−26
−25.5
12
−120 to −47
±2
±3
333
0.5
1.5 × IF_
FILTER_BW
96
0.5
−54/−88
−45/−66
−85/−85
−39/−52
24 − j60
26 − j63
58 − j124
63 − j129
68 − j134
96 − j160
178 − j190
182.5 − j194
or −f
DEV
Rev. 0 | Page 8 of 60
Unit Test Conditions/Comments
Desired signal (2FSK, 9.6 kbps, ±4 kHz deviation) is 3 dB
above the sensitivity point (BER = 10
ferer (2FSK, 9.6 kbps, ±4 kHz deviation) is placed at the
image frequency of f
increased until BER = 10
dB Uncalibrated/calibrated,
dB Uncalibrated/calibrated,
Desired signal is 3 dB above the sensitivity point of
−109.5 dBm; rejection is measured as the level of an
unmodulated interferer to cause a BER of 10
desired signal; as per ETSI EN 300 220-1
dBm
dBm
dBm
dBm
dBm 2FSK mode, BER = 10
dBm
dB Input power range = −100 dBm to −47 dBm
dB Input power range = −100 dBm to −47 dBm
μs As per AGC gain stage, AGC clock = 3 kHz
kHz Range is programmable in Register 10 (Bits[DB31:DB24])
kHz Range is programmable in Register 10 (Bits[DB31:DB24])
Bits Dependent on modulation index
kHz Input power range = −100 dBm to +12 dBm
dBm <1 GHz at antenna input, unfiltered conductive/filtered
conductive
dBm >1 GHz at antenna input, unfiltered conductive/filtered
conductive
dBm <1 GHz at antenna input, unfiltered conductive/filtered
conductive
dBm
>1 GHz at antenna input, unfiltered conductive/filtered
conductive
RFIN to RFGND; refer to the AN-859 Application Note for
other frequencies
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
. It is also equal to half the frequency spacing between adjacent symbols.
DEV
−2 ); modulated inter-
− 200 kHz; the interferer level is
RF
−2
3 V = 3.0 V, T = 25°C
DD A
3
V = 3.0 V, T = 25°C
DD A
−2
for the
−3