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DigitalAudio192 .pdf


Original filename: DigitalAudio192.pdf
Title: Microsoft Word - Digital Audio Series, 28-192KHz, Rev 2.doc
Author: Linda

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Digital Audio Interface Transformer
For Sampling Rates 28KHz to 192KHz
Functions of Transformer:
- Isolation of the system power return from ground loops
- Impedance matching between Driver and Receiver
- DC blocking
- Common Mode Noise and EMI rejection
- High frequency rejection
Features:
- Works with transmitter ICs: Cirrus Logic (Crystal), Rane,
TI/Burr-Brown, AKM, Yamaha, Wolfram, etc.
- Works in ambient temperature: 0°C to 70°C

Applications
Connections
Between
RCA

RCA

BNC

BNC

XLR

XLR

Line

Digital
Audio
Interface

Unbalanced

SPDIF

Differences Between Interfaces
Impeda
nce
Ratio

XFMR
Turns
Ratio

AES3

110:100

Balanced
XLR-3

Unbalanced
BNC

Unbalanced
RCA

Impedance



110

75

75

1:1

Output Level

Vp-p

2-7

1.0

0.5

Max Output
V

Vp-p

7

1.2

0.6

Max Current

mA

64

1.6

8

Min Input

V

0.2

0.32

0.2

STP

Coax

Coax

100

1000

10

Trans
mitter

XLR

Balanced

AES3

110:110

1:1

Trans
mitter

RCA

Unbalanced

SPDIF

300:75

2:1

XLR

RCA

110:75

1.21:1

BNC

AE-3id
BalancedUnbalanced

BNC

From AES3
To SPDIF

SPDIF

Unit

AE-3id
Balanced

AES-3id

Line
Connector

1:1

75:75

AES3

Cable
Max Distance

m

Requirements for Transformer
Sampling Rate
32KHz

Sampling Rate Versus Bandwidth
Sampling Rate

(KHz)

28

32

48

96

192

Pass Range
(-1dB Max)
Low Cut-off
Frequency
High Cut-off
Frequency
Bandwidth (-3dB)

(MHz)

3.6

4.1

6.2

12.3

24.6

(MHz)
Max.
(MHz)
Min.
(MHz)

0.3

0.4

0.6

1.2

2.5

40

50

70

130

250

Vo/Vi
(dB)

28KHz

96KHz

48KHz

192KHz

0
-1
-3

0.3-250
0.3

3.6

Bandwidth

6.1
4.1

24.6
12.3

250

F
(MHz)

Electrical Specifications @25°C
Schott
P/N

Turns
Ratio

OCL
(Cable Side)
uH Min.

LL

IWC

DCR

DCR

uH Max.

pF Max

Ω ± 20%

Ω± 20%

Style

Foot Print

#

A22083

1:1

225

0.2

100

0.44

0.44

T case

4 Pin THD

5

A22133

1:1

225

0.2

20

0.12

0.12

ER9.5

6 Pin THD

4

A22160

1:1

225

0.2

100

0.12

0.12

ER9.5

6 Pin THD

1

A22523

1:1.22

225

0.2

20

0.12

0.15

ER9.5

6 Pin THD

4

Shield,
75Ω:100Ω

A24393

1:3

225

0.2

100

0.14

0.43

ER9.5

6 Pin THD

1

Higher Voltage

A37211

1:1

225

0.2

100

0.12

0.12

ER9.5

8 Pin SMD

2

A37246

1:1

225

0.2

20

0.12

0.12

ER9.5

8 Pin SMD

3

A1001

1:2

225

0.2

100

0.12

0.24

ER9.5

8 Pin SMD

6

Schott Magnetics - Tacna International Corp.

210 N. Saint Olaf, Canby, MN 56220

(507) 223-5572

Package

Website: www.SchottMagnetics.com

Schematic
Specialty
Shield

5/21/09 Rev 2

Page 1

Digital Audio Interface Transformer
For Sampling Rates 28KHz to 192KHz

6
1

58
6

4

Schott Magnetics - Tacna International Corp.

210 N. Saint Olaf, Canby, MN 56220

(507) 223-5572

Website: www.SchottMagnetics.com

85

5/21/09 Rev 2

Page 2


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