SWRS045F January   2006  – November 2018 CC1021

PRODUCTION DATA.  

  1. 1Device Overview
    1. 1.1 Features
    2. 1.2 Applications
    3. 1.3 Description
    4. 1.4 Functional Block Diagram
  2. 2Revision History
  3. 3Terminal Configuration and Functions
    1. 3.1 Pin Diagram
    2. 3.2 Pin Configuration
  4. 4Specifications
    1. 4.1  Absolute Maximum Ratings
    2. 4.2  ESD Ratings
    3. 4.3  Recommended Operating Conditions
    4. 4.4  RF Transmit
    5. 4.5  RF Receive
    6. 4.6  RSSI / Carrier Sense
    7. 4.7  Intermediate Frequency (IF)
    8. 4.8  Crystal Oscillator
    9. 4.9  Frequency Synthesizer
    10. 4.10 Digital Inputs / Outputs
    11. 4.11 Current Consumption
    12. 4.12 Thermal Resistance Characteristics for VQFNP Package
  5. 5Detailed Description
    1. 5.1  Overview
    2. 5.2  Functional Block Diagram
    3. 5.3  Configuration Overview
      1. 5.3.1 Configuration Software
    4. 5.4  Microcontroller Interface
      1. 5.4.1 Configuration Interface
      2. 5.4.2 Signal Interface
      3. 5.4.3 PLL Lock Signal
    5. 5.5  4-wire Serial Configuration Interface
    6. 5.6  Signal Interface
      1. 5.6.1 Synchronous NRZ Mode
      2. 5.6.2 Transparent Asynchronous UART Mode
      3. 5.6.3 Synchronous Manchester Encoded Mode
        1. 5.6.3.1 Manchester Encoding and Decoding
    7. 5.7  Data Rate Programming
    8. 5.8  Frequency Programming
      1. 5.8.1 Dithering
    9. 5.9  Receiver
      1. 5.9.1  IF Frequency
      2. 5.9.2  Receiver Channel Filter Bandwidth
      3. 5.9.3  Demodulator, Bit Synchronizer and Data Decision
      4. 5.9.4  Receiver Sensitivity versus Data Rate and Frequency Separation
      5. 5.9.5  RSSI
      6. 5.9.6  Image Rejection Calibration
      7. 5.9.7  Blocking and Selectivity
      8. 5.9.8  Linear IF Chain and AGC Settings
      9. 5.9.9  AGC Settling
      10. 5.9.10 Preamble Length and Sync Word
      11. 5.9.11 Carrier Sense
      12. 5.9.12 Automatic Power-Up Sequencing
      13. 5.9.13 Automatic Frequency Control
      14. 5.9.14 Digital FM
    10. 5.10 Transmitter
      1. 5.10.1 FSK Modulation Formats
      2. 5.10.2 Output Power Programming
      3. 5.10.3 TX Data Latency
      4. 5.10.4 Reducing Spurious Emission and Modulation Bandwidth
    11. 5.11 Input and Output Matching and Filtering
    12. 5.12 Frequency Synthesizer
      1. 5.12.1 VCO, Charge Pump, and PLL Loop Filter
      2. 5.12.2 VCO and PLL Self-Calibration
      3. 5.12.3 PLL Turn-on Time versus Loop Filter Bandwidth
      4. 5.12.4 PLL Lock Time versus Loop Filter Bandwidth
    13. 5.13 VCO and LNA Current Control
    14. 5.14 Power Management
    15. 5.15 On-Off Keying (OOK)
    16. 5.16 Crystal Oscillator
    17. 5.17 Built-in Test Pattern Generator
    18. 5.18 Interrupt on Pin DCLK
      1. 5.18.1 Interrupt Upon PLL Lock
      2. 5.18.2 Interrupt Upon Received Signal Carrier Sense
    19. 5.19 PA_EN and LNA_EN Digital Output Pins
      1. 5.19.1 Interfacing an External LNA or PA
      2. 5.19.2 General-Purpose Output Control Pins
      3. 5.19.3 PA_EN and LNA_EN Pin Drive
    20. 5.20 System Considerations and Guidelines
      1. 5.20.1 SRD Regulations
      2. 5.20.2 Narrowband Systems
      3. 5.20.3 Low Cost Systems
      4. 5.20.4 Battery Operated Systems
      5. 5.20.5 High Reliability Systems
      6. 5.20.6 Frequency Hopping Spread Spectrum Systems (FHSS)
    21. 5.21 Antenna Considerations
    22. 5.22 Configuration Registers
      1. 5.22.1 Memory
  6. 6Applications, Implementation, and Layout
    1. 6.1 Application Information
      1. 6.1.1 Typical Application
    2. 6.2 Design Requirements
      1. 6.2.1 Input / Output Matching
      2. 6.2.2 Bias Resistor
      3. 6.2.3 PLL Loop Filter
      4. 6.2.4 Crystal
      5. 6.2.5 Additional Filtering
      6. 6.2.6 Power Supply Decoupling and Filtering
    3. 6.3 PCB Layout Guidelines
  7. 7Device and Documentation Support
    1. 7.1 Device Support
      1. 7.1.1 Device Nomenclature
    2. 7.2 Documentation Support
      1. 7.2.1 Community Resources
    3. 7.3 Trademarks
    4. 7.4 Electrostatic Discharge Caution
    5. 7.5 Export Control Notice
    6. 7.6 Glossary
  8. 8Mechanical Packaging and Orderable Information
    1. 8.1 Packaging Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.1.1 Typical Application

CC1021 typ_app_test_crct_swrs045.pngFigure 6-1 Typical Application and Test Circuit (Power Supply Decoupling Not Shown)
CC1021 alt_app_crct_swrs045.pngFigure 6-2 Alternative Application Circuit (Power Supply Decoupling Not Shown)

Table 6-1 Overview of External Components (Excluding Supply Decoupling Capacitors)

REF DESCRIPTION
C1 LNA input match and DC block, see Section 5.11
C3 PA output match and DC block, see Section 5.11
C4 Crystal load capacitor, see Section 5.16
C5 Crystal load capacitor, see Section 5.16
C6 PLL loop filter capacitor
C7 PLL loop filter capacitor (may be omitted for highest loop bandwidth)
C8 PLL loop filter capacitor (may be omitted for highest loop bandwidth)
C60 Decoupling capacitor
L1 LNA match and DC bias (ground), see Section 5.11
L2 PA match and DC bias (supply voltage), see Section 5.11
R1 Precision resistor for current reference generator
R2 PLL loop filter resistor
R3 PLL loop filter resistor
R10 PA output match, see Section 5.11
XTAL Crystal, see Section 5.16

Table 6-2 Bill of Materials for the Application Circuit in Figure 6-1(1)(2)

ITEM 433 MHz 868 MHz 915 MHz
C1(3) 10 pF, 5%, NP0, 0402 47 pF, 5%, NP0, 0402 47 pF, 5%, NP0, 0402
C3(3) 5.6 pF, 5%, NP0, 0402 10 pF, 5%, NP0, 0402 10 pF, 5%, NP0, 0402
C4 22 pF, 5%, NP0, 0402 22 pF, 5%, NP0, 0402 22 pF, 5%, NP0, 0402
C5 12 pF, 5%, NP0, 0402 12 pF, 5%, NP0, 0402 12 pF, 5%, NP0, 0402
C6 3.9 nF, 10%, X7R, 0603 3.9 nF, 10%, X7R, 0603 3.9 nF, 10%, X7R, 0603
C7 120 pF, 10%, X7R, 0402 120 pF, 10%, X7R, 0402 120 pF, 10%, X7R, 0402
C8 33 pF, 10%, X7R, 0402 33 pF, 10%, X7R, 0402 33 pF, 10%, X7R, 0402
C60 220 pF, 5%, NP0, 0402 220 pF, 5%, NP0, 0402 220 pF, 5%, NP0, 0402
L1(3) 33 nH, 5%, 0402 82 nH, 5%, 0402 82 nH, 5%, 0402
L2(3) 22 nH, 5%, 0402 3.6 nH, 5%, 0402 3.6 nH, 5%, 0402
R1 82 kΩ, 1%, 0402 82 kΩ, 1%, 0402 82 kΩ, 1%, 0402
R2 12 kΩ, 5%, 0402 12 kΩ, 5%, 0402 12 kΩ, 5%, 0402
R3 39 kΩ, 5%, 0402 39 kΩ, 5%, 0402 39 kΩ, 5%, 0402
R10 82 Ω, 5%, 0402 82 Ω, 5%, 0402 82 Ω, 5%, 0402
XTAL 14.7456 MHz crystal, 16 pF load 14.7456 MHz crystal, 16 pF load 14.7456 MHz crystal, 16 pF load
(1) The PLL loop filter is optimized for 38.4 kBaud data rate.
(2) The PLL loop filter component values in Table 6-2 (R2, R3, C6-C8) are optimized for 38.4 kBaud data rate. The SmartRF™ Studio software provides component values for other data rates using the equations in Section 5.12.1.
(3) Items shaded vary for different frequencies.

In the CC1020EMX reference design, which is also applicable for the CC1021 device, LQG15HS series inductors from Murata have been used. The switch is SW-456 from M/A-COM.

The LC filter in Figure 6-1 is inserted in the TX path only. The filter will reduce the emission of harmonics and the spurious emissions in the TX path. An alternative is to insert the LC filter between the antenna and the T/R switch as shown in Figure 6-2.

The filter will reduce the emission of harmonics and the spurious emissions in the TX path as well as increase the receiver selectivity. The sensitivity will be slightly reduced due to the insertion loss of the LC filter.