ADF7021-V データシートの表示（PDF） - Analog Devices

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ADF7021-V

High Performance, Narrow-Band Transceiver IC

Analog Devices 

ADF7021-V

Parameter

Min Typ

Max

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)

Input Power Range4

Linearity

Absolute Accuracy

Response Time

AUTOMATIC FREQUENCY LOOP

(AFC)

Pull-In Range, Minimum

Pull-In Range, Maximum

Response Time

Accuracy

Rx SPURIOUS EMISSIONS5

External 920 MHz VCO

External 920 MHz VCO

External 1738 MHz VCO

External 1738 MHz VCO

LNA INPUT IMPEDANCE

fRF = 915 MHz

fRF = 868 MHz

fRF = 470 MHz

fRF = 450 MHz

fRF = 426 MHz

fRF = 315 MHz

fRF = 175 MHz

fRF = 169 MHz

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

Unit

dB

dB

dBm

dBm

dBm

dBm

dBm

Test Conditions/Comments

Desired signal (2FSK, 9.6 kbps, ±4 kHz deviation) is 3 dB

above the sensitivity point (BER = 10−2); modulated inter-

ferer (2FSK, 9.6 kbps, ±4 kHz deviation) is placed at the

image frequency of fRF − 200 kHz; the interferer level is

increased until BER = 10−2

Uncalibrated/calibrated,3 VDD = 3.0 V, TA = 25°C

Uncalibrated/calibrated,3 VDD = 3.0 V, TA = 25°C

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 10−2 for the

desired signal; as per ETSI EN 300 220-1

2FSK mode, BER = 10−3

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

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 fDEV is defined as the frequency spacing from the RF carrier to +fDEV or −fDEV. It is also equal to half the frequency spacing between adjacent symbols.

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).

Rev. 0 | Page 8 of 60

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