SI4438-C2A-GM datasheet, PDF - EEWORLD Datasheet

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SI4438-C2A-GM: DescriptionIC RF TXRX+MCU ISM<1GHZ 20-VFQFN; CategoryWireless rf/communication Telecom circuit; File Size1MB，44 Pages; ManufacturerSilicon Laboratories Inc; Environmental Compliance

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SI4438-C2A-GM Overview

IC RF TXRX+MCU ISM<1GHZ 20-VFQFN

SI4438-C2A-GM Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
package instruction	LEAD FREE, MO-220VGGD-8, QFN-20
Reach Compliance Code	compliant
JESD-30 code	S-XQCC-N20
length	4 mm
Number of functions	1
Number of terminals	20
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	UNSPECIFIED
encapsulated code	HVQCCN
Package shape	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Maximum seat height	0.9 mm
Nominal supply voltage	3.3 V
surface mount	YES
Telecom integrated circuit types	TELECOM CIRCUIT
Temperature level	INDUSTRIAL
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
width	4 mm
Base Number Matches	1

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S i4438- C

I G H

-P

E R F O R M A N C E

, L

O W

-C

U R R E N T

R A N SC E I V E R

Features



Frequency

range = 425–525 MHz

Receive sensitivity = –124 dBm

Modulation



(G)FSK



OOK



Excellent selectivity performance



dB adjacent channel



75 dB blocking at 1 MHz



Max output power



+20

dBm

Low active power consumption



mA RX

Ultra low current powerdown

modes



nA shutdown, 40 nA standby



Data rate = 100 bps to 500 kbps



Preamble Sense Mode



mA average Rx current at

1.2 kbps

Antenna diversity and T/R switch

control

Highly configurable packet handler

TX and RX 64 byte FIFOs

Auto frequency control (AFC)

Automatic gain control (AGC)

Low BOM

Low battery detector

Temperature sensor

20-Pin QFN package

IEEE 802.15.4g ready

Suitable for China regulatory (State

Grid)

Pin Assignments



Fast wake and hop times

Power supply = 1.8 to 3.8 V

Applications



China smart meters

Description

Silicon Laboratories' Si4438 is a high-performance, low-current

transceivers covering the sub-GHz frequency bands from 425 to

525 MHz. The Si4438 is targeted at the Chinese smart meter market and

is especially suited for electric meters. This device is footprint- and

pin-compatible with the Si446x radios, which provide industry-leading

performance for worldwide sub-GHz applications. The radios are part of

the EZRadioPRO

family, which includes a complete line of transmitters,

receivers, and transceivers covering a wide range of applications. All

parts offer outstanding sensitivity of –124 dBm while achieving extremely

low active and standby current consumption. The 58 dB adjacent channel

selectivity with 12.5 kHz channel spacing ensures robust receive

operation in harsh RF conditions. The Si4438 offers exceptional output

power of up to +20 dBm with outstanding TX efficiency. The high output

power and sensitivity results in an industry-leading link budget of 144 dB

allowing extended ranges and highly robust communication links.

Patents pending

Rev 1.0

Si4438-C

Si4438-C

A B L E O F

O N T E N T S

Section

Page

1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

3. Controller Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

3.1. Serial Peripheral Interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

3.2. Fast Response Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3.3. Operating Modes and Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3.4. Application Programming Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

3.5. Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

3.6. GPIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

4. Modulation and Hardware Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

4.1. Modulation Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

4.2. Hardware Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

4.3. Preamble Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

5. Internal Functional Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

5.1. RX Chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

5.2. RX Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

5.3. Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

5.4. Transmitter (TX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

5.5. Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

6. Data Handling and Packet Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

6.1. RX and TX FIFOs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

6.2. Packet Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

7. RX Modem Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

8. Auxiliary Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

8.1. Wake-up Timer and 32 kHz Clock Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

8.2. Low Duty Cycle Mode (Auto RX Wake-Up) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

8.3. Temperature, Battery Voltage, and Auxiliary ADC . . . . . . . . . . . . . . . . . . . . . . . . . .34

8.4. Low Battery Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

8.5. Antenna Diversity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

8.6. Preamble Sense Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

9. Pin Descriptions: Si4438-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

10. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

11. Package Outline: Si4438 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

12. PCB Land Pattern: Si4438 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

13. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

13.1. Si4438 Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

13.2. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Rev 1.0

SI4438-C2A-GM Related Products

	SI4438-C2A-GM	SI4438-C2A-GMR
Description	IC RF TXRX+MCU ISM<1GHZ 20-VFQFN	IC RF TXRX+MCU ISM<1GHZ 20-VFQFN

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