Document 550
For Analog Devices Isolated
SMT Power Transformers RS-485 Transceivers
• Developed for Analog Devices ADM2482E, ADM2485 and
ADM2487E RS-485 Transceivers for stepping up 5 V or 3.3 V
to 6 V.
• Center tapped primary and secondary windings
• 2500 Vrms, one minute interwinding isolation.
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight 0.94 – 1.0 g
Ambient temperature –40°C to +125°C
Storage temperature Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 600/13″ reel Plastic tape: 24 mm wide, 0.37 mm thick,
16 mm pocket spacing, 6.1 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf
Leakage
inductance4
max (µH)
Volt-time
product5
(V-µsec)
DCR max (Ohms)3
Pri/sec
voltage
Inductance2
min (µH)
Power6 Turns ratio
Part number1
pri
sec
(W)
pri : sec
DA2303-AL_
DA2304-AL_
5 V to 6 V
3.3 V to 6 V
45.6
17.8
0.130
0.086
0.260
0.232
1.0
0.43
34.4
21.5
7.2
7.2
1 : 1.5
1 : 2.2
4
1. When ordering, please specify termination and packaging codes:
DA2303-ALD
8
Dot indicates pin 1
1
Internal code
Termination: L =RoHS compliant tin-silver over tin over nickel over
phos bronze.
3
2
7
Pri
Sec
8
5
6
5
Special order:
0.394
max
T = RoHS tin-silver-copper (95.5/4/0.5) or
10,00
4
S = non-RoHS tin-lead (63/37).
1
Packaging: D=13″ machine ready reel. EIA-481 embossed plastic
tape (600 per full reel).
Primary windings and secondary
windings to be connected
B=Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge),
use code letter D instead.
0.475
12,07
max
in series on the PC board.
Parts manufactured prior
2. Inductance is tested between pins 4 and 3 at 500 kHz, 0.5 Vrms, 0 Adc.
3. DCR is per winding.
4. Leakage inductance is for the primary with both windings connected in
series and with the secondary windings shorted.
5. Based on Bsat of the core at 25°C and number of turns on winding 4-3.
6. Calculated output power based on 150 kHz operating frequency.
Power varies depending on application.
to November 2011 may
be marked differently.
0.235
5,97
max
0.004/0,10
0.319 0.004
8,1 0,1
7. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
0.028
0,70
0.358
9,10
0.067
1,70
4
1
0.079
2,00
5
8
1
Recommended
Land Pattern
0.079
2,00
0.063
1,60
inches
mm
Dimensions are in
Document 550 Revised 11/29/11
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2014
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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