Silicon Laboratories SI4734/35-B20 manual Si4734/35-B20

Page 13

Si4734/35-B20

Table 9. FM Receiver Characteristics1,2 (Continued)

(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

 

 

 

 

 

 

 

Seek/Tune Time6

 

RCLK tolerance

—

—

80

ms/channel

 

 

= 100 ppm

 

 

 

 

 

 

 

 

 

 

 

Powerup Time6

 

From powerdown

—

—

110

ms

RSSI Offset12

 

Input levels of 8 and

–3

—

3

dB

 

 

60 dBµV at RF Input

 

 

 

 

 

 

 

 

 

 

 

Notes:

 

 

 

 

 

 

1.Additional testing information is available in Application Note AN388. Volume = maximum for all tests. Tested at RF = 98.1 MHz.

2.To ensure proper operation and receiver performance, follow the guidelines in “AN383: Antenna Selection and Universal Layout Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers.

3.FMOD = 1 kHz, 75 µs de-emphasis, MONO = enabled, and L = R unless noted otherwise.

4.Δf = 22.5 kHz.

5.BAF = 300 Hz to 15 kHz, A-weighted.

6.Guaranteed by characterization.

7.VEMF = 1 mV.

8.f2 – f1 > 2 MHz, f0 = 2 x f1 – f2. AGC is disabled. Refer to "6. Pin Descriptions: Si4734/35-GM" on page 30.

9.Δf = 75 kHz.

10.At LOUT and ROUT pins.

11.Analog audio output mode.

12.At temperature (25°C).

Rev. 1.0

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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 InterfaceRST Parameter Symbol Min Typ Max UnitGPO1, GPO2/INT Start Wire Control Interface Characteristics1,2,3Sclk Sdio Sclk SENSPI Control Interface Write Timing Parameters Dclk DFS Dout RDS Bler 5% FM Receiver Characteristics1,2Fmdeemphasis = Si4734/35-B20 KHz Long Wave LW 153 279 Refclk RefclkprescaleCrystal Oscillator Si4734/35-GM Typical Application SchematicComponents Value/Description Supplier Bill of MaterialsOptional Components Overview Functional Description5.5 3.6VFM Receiver Operating ModesAM Receiver SW ReceiverAudio Data Formats Digital Audio Interface Si4735 OnlyAudio Sample Rates 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/RBDSSi4734/35 Top Mark Package Markings Top MarksTop Mark Explanation Package Outline Si4734/35 QFN Symbol Millimeters Min Nom MaxPCB Land Pattern PCB Land Pattern Si4734/35 QFNSymbol Millimeters Min Max PCB Land Pattern DimensionsBSC 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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