ADF7021 IC Datasheet

ADF7021 Datasheet PDF, Equivalent


Part Number

ADF7021

Description

High Performance Narrow-Band Transceiver IC

Manufacture

Analog Devices

Total Page 30 Pages
Datasheet
Download ADF7021 Datasheet


ADF7021
Data Sheet
High Performance
Narrow-Band Transceiver IC
ADF7021
FEATURES
Low power, narrow-band transceiver
Frequency bands using dual VCO
80 MHz to 650 MHz
862 MHz to 950 MHz
Modulation schemes
2FSK, 3FSK, 4FSK, MSK
Spectral shaping
Gaussian and raised cosine filtering
Data rates supported
0.05 kbps to 32.8 kbps
2.3 V to 3.6 V power supply
Programmable output power
−16 dBm to +13 dBm in 63 steps
Automatic PA ramp control
Receiver sensitivity
−130 dBm at 100 bps, 2FSK
−122 dBm at 1 kbps, 2FSK
−113 dBm at 25 kbps, raised cosine 2FSK
Patent pending, on-chip image rejection calibration
On-chip VCO and fractional-N PLL
On-chip, 7-bit ADC and temperature sensor
Fully automatic frequency control loop (AFC)
Digital received signal strength indication (RSSI)
Integrated Tx/Rx switch
0.1 μA leakage current in power-down mode
APPLICATIONS
Narrow-band standards
ETSI EN 300 220, FCC Part 15, FCC Part 90, FCC Part 95,
ARIB STD-T67
Low cost, wireless data transfer
Remote control/security systems
Wireless metering
Private mobile radio
Wireless medical telemetry service (WMTS)
Keyless entry
Home automation
Process and building control
Pagers
RLNA
RSET
FUNCTIONAL BLOCK DIAGRAM
CE CREG(1:4)
TEMP
SENSOR
MUX
7-BIT ADC
LDO(1:4)
MUXOUT
TEST MUX
RFIN
RFINB
LNA
IF FILTER
RSSI/
LOG AMP
2FSK
3FSK
4FSK
DEMODULATOR
CLOCK
AND DATA
RECOVERY
Tx/Rx
CONTROL
GAIN
PA RAMP
AGC
CONTROL
AFC
CONTROL
SERIAL
PORT
RFOUT
÷1/÷2
VCO1
÷2
DIV P
N/N + 1
Σ-
MODULATOR
VCO2
MUX
CP PFD
DIV R
OSC
2FSK
3FSK
4FSK
MOD CONTROL
CLK
DIV
GAUSSIAN/
RAISED COSINE
FILTER
3FSK
ENCODING
TxRxCLK
TxRxDATA
SWD
SLE
SDATA
SREAD
SCLK
L1 L2 VCOIN CPOUT
OSC1 OSC2
Figure 1.
CLKOUT
Rev. D
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Technical Support
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ADF7021
ADF7021
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
General Description ......................................................................... 4
Specifications..................................................................................... 5
RF and PLL Specifications........................................................... 5
Transmission Specifications........................................................ 6
Receiver Specifications ................................................................ 8
Digital Specifications ................................................................. 10
General Specifications ............................................................... 11
Timing Characteristics .............................................................. 11
Absolute Maximum Ratings.......................................................... 15
ESD Caution................................................................................ 15
Pin Configuration and Function Descriptions........................... 16
Typical Performance Characteristics ........................................... 18
Frequency Synthesizer ................................................................... 22
Reference Input........................................................................... 22
MUXOUT.................................................................................... 23
Voltage Controlled Oscillator (VCO) ...................................... 24
Choosing Channels for Best System Performance................. 25
Transmitter ...................................................................................... 26
RF Output Stage.......................................................................... 26
Modulation Schemes.................................................................. 26
Spectral Shaping ......................................................................... 28
Modulation and Filtering Options ........................................... 29
Transmit Latency ........................................................................ 29
Test Pattern Generator............................................................... 29
Receiver Section.............................................................................. 30
RF Front End............................................................................... 30
IF Filter ........................................................................................ 30
RSSI/AGC.................................................................................... 31
Demodulation, Detection, and CDR ....................................... 32
Data Sheet
Receiver Setup............................................................................. 34
Demodulator Considerations ................................................... 36
AFC Operation ........................................................................... 36
Automatic Sync Word Detection (SWD)................................ 37
Applications Information .............................................................. 38
IF Filter Bandwidth Calibration............................................... 38
LNA/PA Matching...................................................................... 38
Image Rejection Calibration ..................................................... 39
Packet Structure and Coding.................................................... 41
Applications Circuit ................................................................... 44
Serial Interface ................................................................................ 45
Readback Format........................................................................ 45
Interfacing to Microcontroller/DSP ........................................ 46
Register 0—N Register............................................................... 47
Register 1—VCO/Oscillator Register...................................... 47
Register 2—Transmit Modulation Register ............................ 49
Register 3—Transmit/Receive Clock Register........................ 50
Register 4—Demodulator Setup Register ............................... 51
Register 5—IF Filter Setup Register......................................... 52
Register 6—IF Fine Cal Setup Register ................................... 53
Register 7—Readback Setup Register...................................... 54
Register 8—Power-Down Test Register .................................. 55
Register 9—AGC Register......................................................... 56
Register 10—AFC Register ....................................................... 57
Register 11—Sync Word Detect Register................................ 58
Register 12—SWD/Threshold Setup Register........................ 58
Register 13—3FSK/4FSK Demod Register ............................. 59
Register 14—Test DAC Register............................................... 60
Register 15—Test Mode Register ............................................. 61
Outline Dimensions ....................................................................... 62
Ordering Guide .......................................................................... 62
Rev. D | Page 2 of 62


Features Data Sheet High Performance Narrow-Band Transceiver IC ADF7021 FEATURES Low p ower, narrow-band transceiver Frequency bands using dual VCO 80 MHz to 650 MHz 862 MHz to 950 MHz Modulation schemes 2FSK, 3FSK, 4FSK, MSK Spectral shaping Gaussian and raised cosine filtering Da ta rates supported 0.05 kbps to 32.8 kb ps 2.3 V to 3.6 V power supply Programm able output power −16 dBm to +13 dBm in 63 steps Automatic PA ramp control R eceiver sensitivity −130 dBm at 100 b ps, 2FSK −122 dBm at 1 kbps, 2FSK − 113 dBm at 25 kbps, raised cosine 2FSK Patent pending, on-chip image rejection calibration On-chip VCO and fractiona l-N PLL On-chip, 7-bit ADC and temperat ure sensor Fully automatic frequency co ntrol loop (AFC) Digital received signa l strength indication (RSSI) Integrated Tx/Rx switch 0.1 μA leakage current i n power-down mode APPLICATIONS Narrow-b and standards ETSI EN 300 220, FCC Part 15, FCC Part 90, FCC Part 95, ARIB STD -T67 Low cost, wireless data transfer Remote control/security s.
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