7787

Document 244-1
ADSL Transformers
For Analog Devices
chipsets
This product is not RoHS-compliant. Contact Coilcraft
for current status or possible alternatives.
These transformers have been designed to provide optimum performance with various ADSL chip sets from
Analog Devices.
They feature a compact size, minimum DC resistance
and very low leakage inductance. Primary inductance is
stable from -40°C to +85°C and the longitudinal balance
is optimized for the best overall performance at the ADSL
transmission speed. Most parts have been designed to
meet UL 1950 requirements.
For free evaluation samples or to discuss custom designs,
please contact Coilcraft.
SPECIFICATIONS
Line side
Leakage
DCR max (Ohms)
Part
inductance inductance
number Style
Chip set
(mH)
max (µH)
Chip side Line side
AS7787-A
THT
AD20MSP910/918 CO/CPE 5.0 ± 10%
16
1.21 (10-8), 1.65 (9-7)
1.42 (1-3, 2-4)
AS8456-A
SMT
AD20MSP910/918 CO/CPE 5.0 ± 10%
16
1.21 (10-8), 1.65 (9-7)
1.42 (1-3, 2-4)
AS8923-A
THT
AD20MSP930 CO
2.03 min
7.5
0.60 (1-3, 2-4)
0.60 (10-8), 0.60 (9-7)
AS8908-A
SMT
AD20MSP930 CO
2.03 min
7.5
0.60 (1-3, 2-4)
0.60 (10-8), 0.60 (9-7)
AS8925-A
THT
AD20MSP930 CPE
2.42 min
7.5
0.55 (1-3, 2-4)
0.58 (10-8), 0.58 (9-7)
AS8924-A
SMT
AD20MSP930 CPE
2.42 min
7.5
0.55 (1-3, 2-4)
0.58 (10-8), 0.58 (9-7)
Part
number
AS7787-A
AS8456-A
AS8923-A
AS8908-A
AS8925-A
AS8924-A
Dielectric
strength
Turns ratio
Capacitance
(V)
line:chip
max (pF)
1875
1 : 1
55
1875
1 : 1
55
2300
1.1 : 1
2300
1.1 : 1
2300
1.2 : 1
2300
1.2 : 1
Longitudinal
balance
min (dB)
40 (20 kHz – 1.1 MHz)
40 (20 kHz – 1.1 MHz)
40 (20 kHz – 1.1 MHz)
40 (20 kHz – 1.1 MHz)
40 (20 kHz – 1.1 MHz)
40 (20 kHz – 1.1 MHz)
THD
@ 20 kHz
typ (dB)
–89
–89
–85
–85
–85
–85
Designed
to meet
UL 1459, 1950
UL 1459, 1950
UL 1459, 1950
UL 1459, 1950
UL 1459, 1950
UL 1459, 1950
1.All electrical specifications referenced to line side.
2.Operating temperature range -40°C to +85°C.
3.Electrical specifications at 25°C.
[email protected]
subject to change without notice.
US +1-847-639-6400
Please check our
website for latest information.
UK +44-1236-730595
[email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 244-1 Revised 10/20/10
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 244-2
ADSL Transformers for Analog Devices
AS7787-A, AS8923-A, AS8925-A
AS8456-A, AS8908-A, AS8924-A
B
Dot above pin1
10
1
C
C
A
6
5
B
D
E
E
6
6
5
10
1
F
5
F
A
F
H
G
10
1
Recommended
Board Layout
G
Recommended
Land Pattern
A max B max C max D min E
F typ G dia H dia
0.5500.550 0.500 0.100 0.4000.100 0.013 0.032
13,9713,97 12,70 2,54 10,162,54 0,33 0,82
A max B max C max E
F typ
G typ
0.5300.6990.5000.5900.0980.050 × 0.061
13,4617,7512,7014,992,50 1,27 × 1,55
Packaging 50 parts per tray
Packaging
AS8908-A, AS8924-A: 100 parts per tray
AS8456-A: 175 per 13″ reel. Plastic tape: 32 mm wide, 0.5 mm thick,
28 mm pocket spacing, 12.93 mm pocket depth
Schematics
AS7787-A, AS8456-A
Line
side
Chip
side
AS8923-A, AS8908-A
AS8925-A, AS8924-A
Line
side
Chip
side
1
10
10
3
8
8
3
2
9
9
2
4
7
7
4
1
[email protected]
subject to change without notice.
US +1-847-639-6400
Please check our
website for latest information.
UK +44-1236-730595
[email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 244-2 Revised 10/20/10
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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