MAX9597CTI+T Maxim Integrated Products, MAX9597CTI+T Datasheet

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MAX9597CTI+T

Manufacturer Part Number
MAX9597CTI+T
Description
IC AUD/VID INTERACE 28TQFN-EP
Manufacturer
Maxim Integrated Products
Type
Audio/Video Interfacer
Datasheet

Specifications of MAX9597CTI+T

Applications
DVD, Set-Top Boxes
Mounting Type
Surface Mount
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX9597 single SCART interface routes audio and
video signals between a set-top box decoder chip and
an external SCART connector under I
Operating from a 3.3V supply and a 12V supply, the
MAX9597 consumes 53mW during quiescent operation
and 254mW during average operation when driving
typical signals into typical loads.
The MAX9597 audio section contains left and right audio
paths with an independent operational amplifier at the
inputs. The DirectDrive
2V
eliminating the need for bulky output capacitors and
reducing click-and-pop noise. The zero-cross detection
circuitry also further reduces clicks and pops by
enabling audio sources to switch only during a zero-
crossing.
The MAX9597 video section contains 4 channels of
video filter amplifiers. The standard-definition video sig-
nals from the set-top box decoder chip are lowpass fil-
tered to remove out-of-bandwidth artifacts. The
MAX9597 also supports slow-switching and fast-switch-
ing signals.
The MAX9597 is available in a compact 28-pin thin
QFN package and is specified over the 0°C to +70°C
commercial temperature range.
19-4159; Rev 1; 10/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
RMS
full-scale audio signal biased around ground,
________________________________________________________________ Maxim Integrated Products
General Description
®
output amplifiers create a
STB CHIP
ENCODER
STEREO
VIDEO
AUDIO
DAC
µC
Low-Power Audio/Video Interface
RGB, Y/C, CVBS
STEREO AUDIO
DIFFERENTIAL
SINGLE OR
I
2
C
2
C control.
for Single SCART Connectors
EP
12V
V
12
SLOW SWITCHING
FAST SWITCHING
AND REGISTERS
WITH DirectDrive
CHARGE PUMP
I
VIDEO FILTERS
2
3.3V
C INTERFACE
MAX9597
OUTPUTS
AUDIO
V
ID
♦ 53mW Quiescent Power Consumption
♦ 5µW Shutdown Consumption
♦ Audio Operational Amplifiers to Create Input
♦ Clickless/Popless, DirectDrive Audio
♦ Video Reconstruction Filter with 10MHz Passband
♦ 3.3V and 12V Supply Voltages
3.3V
+ Denotes a lead-free/RoHS-compliant package.
* EP = Exposed pad.
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
V
Filters
and 43dB Attenuation at 27MHz
AUD
MAX9597CTI+
Set-Top Boxes
AV Receivers
GND
PART
FAST AND SLOW SWITCHING
RGB, Y/C, CVBS
L/R AUDIO
System Block Diagram
Ordering Information
TEMP RANGE
0°C to +70°C
SCART
TV
TVs
DVD Players
Applications
PIN-PACKAGE
28 TQFN-EP*
Features
1

Related parts for MAX9597CTI+T

MAX9597CTI+T Summary of contents

Page 1

... VIDEO ENCODER STEREO AUDIO DAC ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Low-Power Audio/Video Interface for Single SCART Connectors ♦ 53mW Quiescent Power Consumption ♦ 5µW Shutdown Consumption 2 C control ...

Page 2

Low-Power Audio/Video Interface for Single SCART Connectors ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) V ..........................................................................-0.3V to +4V VID ................................................................-0.3V to +14V ...............................................................-0.3V to +4V AUD EP to GND ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 3.3V 12V, GND = load, T VID AUD +25°C.) (Note 1) A PARAMETER SYMBOL Max Input Source Resistance Bias Voltage Input Resistance DC CHARACTERISTICS ...

Page 4

Low-Power Audio/Video Interface for Single SCART Connectors ELECTRICAL CHARACTERISTICS (continued 3.3V 12V, GND = load, T VID AUD +25°C.) (Note 1) A PARAMETER SYMBOL AC CHARACTERISTICS Filter ...

Page 5

ELECTRICAL CHARACTERISTICS (continued 3.3V 12V, GND = load, T VID AUD +25°C.) (Note 1) A PARAMETER SYMBOL VIDEO TO AUDIO INTERACTION Crosstalk INPUT AMPLIFIER OPEN-LOOP CHARACTERISTICS Input ...

Page 6

Low-Power Audio/Video Interface for Single SCART Connectors ELECTRICAL CHARACTERISTICS (continued 3.3V 12V, GND = load, T VID AUD +25°C.) (Note 1) A PARAMETER SYMBOL Input Low Voltage ...

Page 7

V = 3.3V 12V, GND = video load is 150Ω to GND, audio load is 10kΩ to GND, T VID AUD 12 wise noted.) VIDEO SMALL-SIGNAL GAIN vs. FREQUENCY 100mV ...

Page 8

Low-Power Audio/Video Interface for Single SCART Connectors ( 3.3V 12V, GND = video load is 150Ω to GND, audio load is 10kΩ to GND, T VID AUD 12 wise noted.) DIFFERENTIAL GAIN ...

Page 9

V = 3.3V 12V, GND = video load is 150Ω to GND, audio load is 10kΩ to GND, T VID AUD 12 wise noted.) V QUIESCENT SUPPLY CURRENT VID vs. TEMPERATURE 14.3 14.2 ...

Page 10

Low-Power Audio/Video Interface for Single SCART Connectors ( 3.3V 12V, GND = video load is 150Ω to GND, audio load is 10kΩ to GND, T VID AUD 12 wise noted.) INPUT-AMPLIFIER SMALL-SIGNAL ...

Page 11

Low-Power Audio/Video Interface PIN NAME Audio Supply. Connect to a 3.3V supply. Bypass with a 10µF aluminum electrolytic capacitor AUD parallel with a 0.1µF ceramic capacitor to EP. 2 C1P Charge-Pump Flying Capacitor Positive Terminal. Connect a ...

Page 12

Low-Power Audio/Video Interface for Single SCART Connectors Detailed Description The MAX9597 represents Maxim’s third generation of SCART audio/video (A/V) switches. Under I these devices route audio, video, and control informa- tion between the set-top box decoder chip and a SCART ...

Page 13

The full-scale output of the independent operational amplifiers is 0.5V . The closed-loop gain of the oper- RMS ational amplifier circuit should be designed such that the resulting full-scale output is 0.5V gain-of-4 amplifiers that follow the independent opera- tional ...

Page 14

Low-Power Audio/Video Interface for Single SCART Connectors ENC_CVBS_IN ENC_R/C_IN ENC_G_IN ENC_B_IN Figure 3. MAX9597 Video Section Function Diagram video transmitter circuit might have a different ground than the video receiver, thereby level shifting the DC bias. The 50Hz power line ...

Page 15

Table 1. Recommended Coupling for Incoming Video Signals and Input Circuit Configuration** VIDEO ORIGIN FORMAT External CVBS External RGB External Y External C Internal CVBS Internal Internal Y, C Internal Y, Pb, Pr Internal CVBS Internal R, ...

Page 16

Low-Power Audio/Video Interface for Single SCART Connectors Table 3. Slave Address DEV_ADDR GND VID SCL SDA SDA t SU, DAT t LOW SCL t ...

Page 17

Conditions section). SDA and SCL idle high when the bus is not busy. START and STOP Conditions SDA and SCL idle high when the bus is not in use. A master initiates communication by issuing a START ...

Page 18

Low-Power Audio/Video Interface for Single SCART Connectors ACKNOWLEDGE FROM MAX9597 S SLAVE ADDRESS 0 R/W Figure 7. Writing a Byte of Data to the MAX9597 ACKNOWLEDGE FROM MAX9597 ACKNOWLEDGE FROM MAX9597 S SLAVE ADDRESS 0 A R/W Figure 8. Writing ...

Page 19

ACKNOWLEDGE FROM MAX9597 ACKNOWLEDGE FROM MAX9597 S SLAVE ADDRESS 0 A R/W Figure 9. Reading One Indexed Byte of Data from the MAX9597 ACKNOWLEDGE FROM MAX9597 ACKNOWLEDGE FROM MAX9597 S SLAVE ADDRESS 0 A REGISTER ADDRESS R/W Figure 10. Reading ...

Page 20

Low-Power Audio/Video Interface for Single SCART Connectors MAX9597 TV_CVBS_OUT Figure 11. Application Circuit to Connect CVBS and Mono Audio from TV SCART to RF Modulator Table 6. Conditions for Average Power Consumption Measurement PIN NAME 1 V AUD 8 ENC_B_IN ...

Page 21

STB CHIP µC VIDEO ENCODER 75Ω 75Ω 75Ω 75Ω 124Ω 15nF STEREO 124Ω AUDIO DACS WITH DIFFERENTIAL OUTPUTS 124Ω 124Ω NOTE: OPTIONAL RESISTOR CAN BE PLACED FROM AUDIO DAC OUTPUTS TO GROUND TO DECREASE SWING AT AUDIO DAC OUTPUTS. Figure ...

Page 22

Low-Power Audio/Video Interface for Single SCART Connectors PCM1742 DAC LEFT RIGHT NOTE: ALL RESISTORS ARE 1%. Figure 13. Lowpass Filter Configuration for the Burr-Brown PCM1742 To better protect the MAX9597 against excess voltages during the cable discharge condition or ESD ...

Page 23

CS4334 DAC 10µF LEFT 270kΩ 10µF RIGHT 270kΩ NOTE: ALL RESISTORS ARE 1%. Figure 15. Lowpass Filter Configuration for the Cirrus CS4334 Keep the full-scale audio output of the preamplifiers to 0.5V . Capacitors C1 and C2 create a one-pole, ...

Page 24

Low-Power Audio/Video Interface for Single SCART Connectors STB CHIP LEFT_P LEFT_N RIGHT_P RIGHT_N Figure 17. Differential to Single-Ended Conversion Circuit for Voltage Mode, Differential Audio Signals Stand-Alone Operational Amplifier Applications The input amplifier of the audio section can be utilized ...

Page 25

STB CHIP µC VIDEO ENCODER STEREO AUDIO DAC Figure 18. Set-Top Box with CVBS Output, S-Video Output, and Stereo Audio Outputs The MAX9597 provides separate ground connections for video and audio supplies. For best performance, use separate ground planes for ...

Page 26

Low-Power Audio/Video Interface for Single SCART Connectors Table 7. Data Format for Write Mode REGISTER ADDRESS BIT 7 BIT 6 (HEXADECIMAL) 0x00 Not used ZCD 0x01 0x02 0x03 0x04 0x05 0x06 Not 0x07 Not used used Not 0x08 Not used ...

Page 27

Table 8. Register 00h: Audio Control DESCRIPTION — TV audio mute — — Zero-crossing detector — Table 9. Register 07h: TV Video Output Control DESCRIPTION — — Set TV slow switching — — — — Set TV fast switching — ...

Page 28

Low-Power Audio/Video Interface for Single SCART Connectors Table 11. Register 0Dh: Output Enable DESCRIPTION — TV_FS_OUT enable — — TV_CVBS_OUT enable — — TV_B_OUT enable — — TV_G_OUT enable — — TV_R/C_OUT enable — Table 12. Register 10h: Operating Modes ...

Page 29

Low-Power Audio/Video Interface for Single SCART Connectors 12V +3.3V 0.1µ STB CHIP SDA µC SCL DEV_ADDR VIDEO ENCODER ENC_CVBS_IN 75Ω ENC_R/C_IN 75Ω ENC_G_IN 75Ω ENC_B_IN 75Ω ENC_INL+ 124Ω 15nF (R ) (C1) F ENC_INL- STEREO 124Ω 15nF AUDIO ...

Page 30

Low-Power Audio/Video Interface for Single SCART Connectors For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 28 TQFN-EP 30 ______________________________________________________________________________________ Package Information PACKAGE CODE T2855-8 DOCUMENT NO. 21-0140 ...

Page 31

For the latest package outline information and land patterns www.maxim-ic.com/packages. ______________________________________________________________________________________ Low-Power Audio/Video Interface for Single SCART Connectors Package Information (continued) 31 ...

Page 32

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 32 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products ...

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