
Coilcraft, Inc. 2010
Specifications subject to change without notice.
Please check our website for latest information.
Coilcraft, Inc. 2010
Document 244-1
Revised 10/20/10
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 de-
signed to meet UL 1950 requirements.
For free evaluation samples or to discuss custom de-
signs, please contact Coilcraft.
SPECIFICATIONS
1. All electrical specifications referenced to line side.
2. Operating temperature range -40°C to +85°C.
3. Electrical specifications at 25°C.
Line side
Leakage
Part
inductance
DCR max (Ohms)
number
Style
Chip set
(mH)
max (H)
Chip side
Line side
AS7787-A
Leaded
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
Leaded
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
Leaded
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)
Dielectric
Longitudinal
THD
Part
strength
Turns ratio
Capacitance
balance
@ 20 kHz
Designed
number
(V)
line:chip
max (pF)
min (dB)
typ (dB)
to meet
AS7787-A
1875
1:1
55
40 (20 kHz – 1.1 MHz)
-89
UL 1459, 1950
AS8456-A
1875
1:1
55
40 (20 kHz – 1.1 MHz)
-89
UL 1459, 1950
AS8923-A
2300
1.1:1
40 (20 kHz – 1.1 MHz)
-85
UL 1459, 1950
AS8908-A
2300
1.1:1
40 (20 kHz – 1.1 MHz)
-85
UL 1459, 1950
AS8925-A
2300
1.2:1
40 (20 kHz – 1.1 MHz)
-85
UL 1459, 1950
AS8924-A
2300
1.2:1
40 (20 kHz – 1.1 MHz)
-85
UL 1459, 1950
ADSLTransformers
For Analog Devices
chipsets
This product is not RoHS-compliant. Contact Coilcraft
for current status or possible alternatives.