AS7787-A Datasheet, PDF (1/2 Pages) Coilcraft lnc. – ADSL Transformers

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 de-
signed to meet UL 1950 requirements.
For free evaluation samples or to discuss custom de-
signs, please contact Coilcraft.
SPECIFICATIONS
Part
number
Style
Chip set
Line side
inductance
(mH)
AS7787-A
AS8456-A
AS8923-A
AS8908-A
AS8925-A
AS8924-A
Leaded
SMT
Leaded
SMT
Leaded
SMT
AD20MSP910/918 CO/CPE
AD20MSP910/918 CO/CPE
AD20MSP930 CO
AD20MSP930 CO
AD20MSP930 CPE
AD20MSP930 CPE
5.0 ± 10%
5.0 ± 10%
2.03 min
2.03 min
2.42 min
2.42 min
Leakage
inductance
max (µH)
DCR max (Ohms)
Chip side
Line side
16
1.21 (10-8), 1.65 (9-7)
1.42 (1-3, 2-4)
16
1.21 (10-8), 1.65 (9-7)
1.42 (1-3, 2-4)
7.5
0.60 (1-3, 2-4) 0.60 (10-8), 0.60 (9-7)
7.5
0.60 (1-3, 2-4) 0.60 (10-8), 0.60 (9-7)
7.5
0.55 (1-3, 2-4) 0.58 (10-8), 0.58 (9-7)
7.5
0.55 (1-3, 2-4) 0.58 (10-8), 0.58 (9-7)
Part
number
Dielectric
strength
(V)
Turns ratio
line:chip
Capacitance
max (pF)
AS7787-A
1875
1:1
55
AS8456-A
1875
1:1
55
AS8923-A
2300
1.1:1
AS8908-A
2300
1.1:1
AS8925-A
2300
1.2:1
AS8924-A
2300
1.2:1
1. All electrical specifications referenced to line side.
2. Operating temperature range -40°C to +85°C.
3. Electrical specifications at 25°C.
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
© Coilcraft, Inc. 2008
Specifications subject to change without notice.
Please check our website for latest information. Document 244-1 Revised 09/25/08