Silicon Laboratories SI4734/35-B20 DC Characteristics, AM/SW/LW Mode, Supplies and Interface

Page 5

Si4734/35-B20

Table 3. DC Characteristics

(VDD = 2.7 to 5.5 V, VIO = 1.5 to 3.6 V, TA = –20 to 85 °C)

Parameter

Symbol

Test Condition

Min

 

Typ

Max

Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FM Mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Supply Current

IFM

 

 

 

 

 

 

—

 

19.2

22

mA

Supply Current1

I

 

Low SNR level

—

 

19.8

23

mA

 

FM

 

 

 

 

 

 

 

 

 

 

 

RDS Supply Current2

I

 

 

 

 

 

 

 

—

 

19.9

23

mA

 

FM

 

 

 

 

 

 

 

 

 

 

 

Supply Current2

IFMD

Digital Output Mode

—

 

18.0

20.5

mA

AM/SW/LW Mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Supply Current

IAM

Analog Output Mode

—

 

17.3

20.5

mA

Supply Current2

I

 

Digital Output Mode

—

 

15.5

20.5

mA

 

AMD

 

 

 

 

 

 

 

 

 

 

 

Supplies and Interface

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interface Supply Current

IIO

 

 

 

 

 

 

—

 

320

600

µA

VDD Powerdown Current

IDDPD

 

 

 

 

 

 

—

 

10

20

µA

VIO Powerdown Current

IIOPD

SCLK, RCLK inactive

—

 

1

10

µA

High Level Input Voltage3

VIH

 

 

 

 

 

 

0.7 x VIO

—

VIO + 0.3

V

Low Level Input Voltage3

VIL

 

 

 

 

 

 

–0.3

 

—

0.3 x VIO

V

High Level Input Current3

I

IH

V

IN

= V

IO

= 3.6 V

–10

 

—

10

µA

 

 

 

 

 

 

 

 

 

 

 

Low Level Input Current3

IIL

 

 

VIN = 0 V,

–10

 

—

10

µA

 

 

 

 

VIO = 3.6 V

 

 

 

 

 

High Level Output Voltage4

V

OH

I

 

= 500 µA

0.8 x V

IO

—

—

V

 

 

 

OUT

 

 

 

 

 

 

 

Low Level Output Voltage4

VOL

IOUT = –500 µA

—

 

—

0.2 x VIO

V

Notes:

1.LNA is automatically switched to higher current mode for optimum sensitivity in weak signal conditions.

2.Specifications are guaranteed by characterization.

3.For input pins SCLK, SEN, SDIO, RST, RCLK, DCLK, and DFS.

4.For output pins SDIO, DOUT, GPO1, GPO2, and GPO3.

Rev. 1.0

5

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Contents Functional Block Diagram FeaturesApplications DescriptionSi4734/35-B20 Table of Contents Parameter Symbol Test Condition Min Typ Max Unit Electrical SpecificationsParameter Symbol Value Unit Recommended Operating ConditionsParameter Symbol Test Condition Min Typ Max Unit FM Mode DC CharacteristicsAM/SW/LW Mode Supplies and InterfaceGPO1, GPO2/INT Parameter Symbol Min Typ Max UnitRST Start Wire Control Interface Characteristics1,2,3Sclk Sdio Sclk SENSPI Control Interface Write Timing Parameters Dclk DFS Dout Fmdeemphasis = FM Receiver Characteristics1,2RDS Bler 5% Si4734/35-B20 KHz Long Wave LW 153 279 Crystal Oscillator RefclkprescaleRefclk Si4734/35-GM Typical Application SchematicOptional Components Bill of MaterialsComponents Value/Description Supplier Overview Functional Description5.5 3.6VFM Receiver Operating ModesAM Receiver SW ReceiverAudio Sample Rates Digital Audio Interface Si4735 OnlyAudio Data Formats I2S Digital Audio Format Stereo DAC Stereo Audio Processing De-emphasisSoft Mute RDS/RBDS Processor Si4735 OnlyBus Mode Select on Rising Edge TuningSeek Reference ClockSPI Control Interface Mode Reset, Power Up, and Power Down Firmware UpgradesProgramming with Commands GPO OutputsSi473x Command Summary Commands and PropertiesCmd DescriptionSi473x Property Summary Prop Name Description DefaultRxvolume RdsconfigAmdeemphasis AmchannelfilterPin Numbers Name Description Pin Descriptions Si4734/35-GMPart Number Description Package Operating Ordering GuideQFN RDS/RBDSTop Mark Explanation Package Markings Top MarksSi4734/35 Top Mark Package Outline Si4734/35 QFN Symbol Millimeters Min Nom MaxPCB Land Pattern PCB Land Pattern Si4734/35 QFNBSC PCB Land Pattern DimensionsSymbol Millimeters Min Max Additional Reference Resources Revision 0.4 to Revision Document Change ListContact Information

SI4734/35-B20 specifications

Silicon Laboratories SI4734/35-B20 is an advanced, highly integrated broadcast radio receiver designed for various consumer applications. Hailed for its compactness and versatility, the SI4734/35-B20 offers extensive features that enable radio reception across multiple frequency bands, including AM, FM, and shortwave. It caters to the needs of manufacturers looking to incorporate reliable radio capabilities into their devices, ensuring quality sound and performance without the cumbersome designs typically associated with traditional radio receivers.

At the heart of the SI4734/35-B20 are performance-optimized technologies. One standout feature is the device's ability to support digital and analog processing simultaneously, utilizing Silicon Labs’ proprietary digital signal processing (DSP) technology. This architecture not only enhances signal clarity but also helps in mitigating noise, enabling users to experience a superior audio quality across varied environments.

Another notable characteristic of the SI4734/35-B20 is its low power consumption, making it ideal for battery-operated devices. The receiver employs sophisticated power management techniques that allow it to operate efficiently, prolonging battery life while maintaining optimal performance. In this context, the “sleep” mode and fast wake-up times contribute to significant energy savings, affirming its suitability for portable applications.

The SI4734/35-B20 is designed with a robust set of features for ease of integration into various systems. The device supports multiple programmable interfaces, including I2C, providing flexibility in communication with microcontrollers and facilitating straightforward integration into existing designs. Because of its programmable architecture, developers can customize the receiver’s capabilities according to the specific needs of their applications.

Additional features include automatic frequency control (AFC) for stability in tuning, allowing seamless transitions while listening to programs. The built-in AGC (automatic gain control) optimizes the receiver's sensitivity to ensure clear reception even in weak signal conditions.

The SI4734/35-B20 also possesses a wide frequency range, accommodating both standard and niche applications. Its compact form factor and surface-mount technology (SMT) footprint further enhance its appeal to developers seeking to maximize board space in their designs.

In conclusion, the Silicon Laboratories SI4734/35-B20 is a significant advancement in radio receiver technology, combining advanced DSP, low power consumption, and ease of integration. These attributes make it a preferred choice for engineers and manufacturers looking to deliver high-quality audio experiences across a range of consumer electronics, from radios to multifunctional smart devices.
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