Si4770-A20-GMR datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > Topical application> Wireless rf/communication> Si4770-A20-GMR

Si4770-A20-GMR: DescriptionRF receiver cons. elect. pro-aud AM/FM rds Rx; CategoryTopical application Wireless rf/communication; File Size2MB，54 Pages; ManufacturerSilicon; Environmental Compliance

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RF receiver cons. elect. pro-aud AM/FM rds Rx

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Si4770/77-A20

I G H

- P

ERFORMANCE

ONSUMER

LECTRONICS

ROADCAST

ADIO

ECEIVER A N D

HD R

ADIO

UNER

Features



Worldwide FM band support

(64–108 MHz)

Worldwide AM band support

(520–1710 kHz)

AM/FM HD Radio support

(Si4777 only)

Comprehensive signal quality

metrics: RSSI, SNR, multipath

interference, frequency offset,

adjacent channel RSSI,

frequency deviation, and image

RSSI

Advanced patented RDS soft-

decision decoder

Advanced, patented FM channel

equalizer for multipath

interference

Dynamic AM/FM channel

bandwidth control

Programmable AM/FM soft mute

FM stereo-mono blend

FM hi-blend control

AM/FM hi-cut control



AM lo-cut filter



L/R analog and digital (I

S) audio

outputs

Digital Low-IF architecture

Frequency synthesizer with fully

integrated PLL-VCO

Fully integrated AM/FM front-end

including high performance LNA,

AGC with integrated resistor and

capacitor banks, and RF and IF

peak detectors

Integrated crystal oscillator

Ordering Information:

See page 49.

Pin Assignments

Si4770/77-A20

LOUT/

MPXOUT

FMAGC1

FMAGC2

DACREF

RCLK/

XTAL2

XTAL1

GPIO1

GPIO2

ROUT

Digital (I

S) Zero-IF AM/FM I/Q

outputs (Si4777 only)



1.2 to 5 V power supplies



QFN 40-pin, 6x6x0.85 mm



Pb-free/RoHS

compliant

FMXIP

FMXIN

RFGND

RFREG

FMO

FMI

NC/BLEND

DCLK

DFS

DOUT

NC/QOUT

NC/IOUT

NC/IQFS

NC/IQCLK

VIO2

DBYP

GND PAD

Applications

Audio/video receivers



Consumer electronics



Boom boxes



Home theater systems



AMI

A1/INTB

NC/DCLK2

NC/DOUT2

RSTB

SDA

SCL

INTB/DFS2

VIO1

Description

The Si4770/77-A20 broadcast receiver and HD Radio tuner (Si4777 only)

employs an advanced, proven digital low-IF architecture to bring

outstanding receiver performance to high-performance consumer

electronics.

Patents pending

Rev. 0.9 6/12

Si4770/77-A20

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

Si4770/77-A20

ABLE

Section

ONTENTS

Page

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

2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3. Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.2. Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.3. Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.4. FM Receiver Front-End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.5. AM Receiver Front-End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.6. Received Signal Qualifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.7. Digital Audio Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.8. Channel Equalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.9. Digital ZIF I/Q Interface (Si4777 Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.10. IBOC Blend Mode for HD Radio (Si4777 Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4.11. Stereo Audio Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4.12. De-emphasis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.13. Analog Audio and FM MPX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.14. Soft Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.15. AM/FM Dynamic Bandwidth Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.16. Seek and Valid Station Qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.17. AM Hi-Cut Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.18. FM Hi-Cut Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.19. FM Hi-Blend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.20. AM Lo-Cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

5. RDS/RBDS Advanced Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6. Programming Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

7. I

C Control Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

7.1. I

C Device Address Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

7.2. I

C Standard Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8. Reset, Powerup, and Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

9. Pin Descriptions: Si4770/77-A20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

10. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

11. Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

12. PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

13. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

13.1. Si4770/77-A20 Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

13.2. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Rev. 0.9

Si4770-A20-GMR Related Products

	Si4770-A20-GMR	Si4777-A20-GMR
Description	RF receiver cons. elect. pro-aud AM/FM rds Rx	RF receiver Hi-performance CE AM/FM rcvr/HD-tuner

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