STA120D STMicroelectronics, STA120D Datasheet

IC RECEIVER AUDIO DIGITAL 28SOIC

STA120D

Manufacturer Part Number
STA120D
Description
IC RECEIVER AUDIO DIGITAL 28SOIC
Manufacturer
STMicroelectronics
Type
Digital Audio Interface Receiverr
Datasheet

Specifications of STA120D

Mounting Type
Surface Mount
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Applications
-
Other names
497-3942-5
497-3942-5
497-3943-5

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DESCRIPTION
The STA120 is a monolithic CMOS device that re-
ceives and decodes audio data according to the
AES/EBU, IEC 958, S/PDIF, & EIAJ CP-340/1201
interface standards.
The STA120 recovers the clock and synchroniza-
BLOCK DIAGRAM
December 2002
MONOLITHIC CMOS RECEIVER
3.3V SUPPLY VOLTAGE
LOW-JITTER, ON-CHIP CLOCK RECOVERY
256xFs OUTPUT CLOCK PROVIDED
SUPPORTS: AES/EBU, IEC 958, S/PDIF, &
EIAJ CP-340/1201 PROFESSIONAL AND
CONSUMER FORMATS
EXTENSIVE ERROR REPORTING REPEAT
LAST SAMPLE ON ERROR OPTION
RXN
RXP
9
10
VD+
7
CS12/FCK
Receiver
RS422
MUX
DGND
8
13
SEL
VA+
16
CLOCK & DATA
RECOVERY
22
C0/E0
FILT
DIGITAL AUDIO INTERFACE RECEIVER
6
20
Ca/E1
AGND
5
21
Cb/E2
MCK
MUX
4
19
Cc/F0
DE MUX
3
tion signals and de-multiplexes the audio and dig-
ital data. Differential or single ended inputs can be
decoded.
The STA120 de-multiplexes the channel, user and
validity data directly to serial output pins with ded-
icated output pins for the most important channel
status bits.
Cd/F1
2
Ce/F2
ORDERING NUMBER: STA120D
27
M3
17
SERIAL PORT
M2
ERF
AUDIO
REGISTERS
18
25
M1
SO28
24
CBL
M0
15
23
D97AU613A
STA120
26
12
11
14
28
1
SDATA
SCK
FSYNC
C
U
VREF
1/15

Related parts for STA120D

STA120D Summary of contents

Page 1

... FILT AGND MCK CLOCK & DATA RECOVERY DE MUX MUX C0/E0 Ca/E1 Cb/E2 Cc/F0 Cd/F1 STA120 SO28 ORDERING NUMBER: STA120D AUDIO SERIAL PORT REGISTERS D97AU613A Ce/F2 ERF CBL SDATA ...

Page 2

STA120 ABSOLUTE MAXIMUM RATINGS Symbol Power Supply Voltage Input Voltage ( excluding pins 9, 10 Ambient Operating Temperature (power applied) amb T Storage Temperature stg PIN CONNECTIONS (Top view) PINS DESCRIPTION N. ...

Page 3

PINS DESCRIPTION (continued) N. Name Control Pins 1 C Channel Status Output. Received channel status bit serial output port. FSYNC may be used to latch this bit externally. Except in I Fsync Channel Status Output Bits.These pin are ...

Page 4

STA120 PINS DESCRIPTION (continued) N. Name 16 SEL Select.Control pin that selects either channel status information (SEL = 1) or error and frequency information (SEL = displayed on six (C0, Ca Cb, Cc, Cd, Ce) pins. 27 ...

Page 5

Figure 1. Circuit Diagram RECEIVER CIRCUIT (See Appendix A) CHANNEL STATUS and/or ERROR/FREQUENCY REPORTING 330 0.47 F GENERAL DESCRIPTION The STA120 is a monolithic CMOS circuit that receives and decodes audio and digital data according to the AES/EBU, IEC 958, ...

Page 6

STA120 frequency detectors pull the VCO frequency within the lock range of the PLL. When no digital audio data is present, the VCO frequency is pulled to its minimum value. Figure 2. Jitter Attenuator Characteristics. (dB 100 ...

Page 7

Table 1. Normal Audio Port Modes ( Special Modes ( When M3 is high, the special audio modes ...

Page 8

STA120 This timing is illustrated in Figure 5. The C output contains the channel status bits with CBL rising indicating the start of a new channel status block. CBL is high for the first four bytes of channel status (32 ...

Page 9

Figure 4. Special Audio Port Formats 12 and 13 FSYNC(out) SCK(out) SDATA(out) AUX LSB FSYNC(out) SCK(out) SDATA(out) AUX LSB Error And Frequency Reporting When SEL is low, error and received frequency information are selected. The error information is encoded on ...

Page 10

STA120 The validity flag indicates that the validity bit for a previous sample was high since the last clearing of the error codes. The slipped sample error can only occur when FSYNC and SCK of the audio serial port are ...

Page 11

Professional Channel Status ( When C0 is low, the received channel status block is encoded according to the professional / broadcast format. The Ca through Ce pins are defined for some of the more important professional bits. As ...

Page 12

STA120 APPENDIX A: RS422 RECEIVER INFORMATION The RS422 receivers on the STA120 is designed to receive both the professional and consumer interfac- es, and meet all specifications listed in the digital audio standards. Figure 6 illustrates the internal sche- matic ...

Page 13

Grounding the shield of the cables a tricky issue. In the configuration of systems important to avoid ground loops and DC current flowing down the shield of the cable that could results when boxes with dif- ferent ground ...

Page 14

STA120 mm DIM. MIN. TYP. MAX. A 2.65 a1 0.1 0.3 0.004 b 0.35 0.49 0.014 b1 0.23 0.32 0.009 C 0 (typ.) D 17.7 18.1 0.697 E 10 10.65 0.394 e 1.27 e3 16.51 F 7.4 7.6 ...

Page 15

... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics ...

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