EVAL-ADF7021-NDBEZ Analog Devices Inc, EVAL-ADF7021-NDBEZ Datasheet - Page 45

• Manufacturer Part Number: EVAL-ADF7021-NDBEZ
• Description: 426MHz To 429 MHz, External L
• Manufacturer: Analog Devices Inc
• Type: Transceiver, FSKr

Specifications of EVAL-ADF7021-NDBEZ

• Frequency: 420MHz ~ 440MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ADF7021-N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q5835434A

APPLICATIONS CIRCUIT
The ADF7021-N requires very few external components for
operation. Figure 57 shows the recommended application
circuit. Note that the power supply decoupling and regulator
capacitors are omitted for clarity.
CONNECTION
*PIN 44 AND PIN 46 CAN BE LEFT FLOATING IF EXTERNAL INDUCTOR VCO IS NOT USED.
NOTES
1. PINS [13:18], PINS [20:21], AND PIN 23 ARE TEST PINS AND ARE NOT USED IN NORMAL OPERATION.
ANTENNA
T-STAGE LC
FILTER
Figure 57. Typical Application Circuit (Regulator Capacitors and Power Supply Decoupling Not Shown)
MATCHING
RESISTOR
VDD
RLNA
CVCO
CAP
VDD
VDD
RSET
RESISTOR
12
10
11
1
2
3
4
5
6
7
8
9
Rev. 0 | Page 45 of 64
VCOIN
CREG1
LOOP FILTER
VDD1
RFOUT
CREG4
GND4
RFGND
RFINB
R
VDD4
RSET
RFIN
LNA
EXT VCO L*
For recommended component values, refer to the ADF7021-N
evaluation board data sheet and AN-859 application note
accessible from the ADF7021-N product page. Follow the
reference design schematic closely to ensure optimum
performance in narrow-band applications.
ADF7021-N
VDD
TCXO
VDD
REFERENCE
TxRxDATA
TxRxCLK
CLKOUT
CREG2
SREAD
SDATA
ADCIN
GND2
SCLK
VDD2
SWD
SLE
36
35
34
33
32
31
30
29
28
27
26
25
CHIP ENABLE
TO MICROCONTROLLER
VDD
TO
MICROCONTROLLER
CONFIGURATION
INTERFACE
TO
MICROCONTROLLER
Tx/Rx SIGNAL
INTERFACE
ADF7021-N