© Coilcraft, Inc. 2010
Specifications subject to change without notice.
Please check our website for latest information.
Document 550
Document 550
Revised 01/05/09
8
5
4
1
1
1
5
4
Recommended
Land Pattern
0.394
10,00
0.475
12,07
0.235
5,97
0.358
9,10
0.067
1,70
0.063
1,60
0.028
0,70
0.319 ±0.004
8,1 ±0,1
0.079
2,00
0.079
2,00
max
Dot indicates pin 1
max
max
0.004 / 0,10
8
SMT Power Transformers
Leakage
Volt-time
Pri / sec
Inductance2
DCR max (Ohms)3
inductance4
product5
Power6
Turns ratio
Part number1
voltage
min (µH)
pri
sec
max (µH)
(V-µsec)
(W)
pri : sec
DA2303-AL_
5 V to 6 V
45.6
0.130
0.260
1.0
34.4
7.2
1 : 1.5
DA2304-AL_
3.3 V to 6 V
17.8
0.086
0.232
0.43
21.5
7.2
1 : 2.2
1. When ordering, please specify termination and packaging codes:
DA2303-A
LD
Termination: L = RoHS compliant tin-silver over tin over nickel over
phos bronze.
Special order: T = RoHS tin-silver-copper (95.5/4/0.5)
or S = non-RoHS tin-lead (63/37).
Packaging:
D =13
″ machine ready reel. EIA-481 embossed plastic
tape (600 per full reel).
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.
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.
7. Operating temperature range -40°C to +85°C.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
For Analog Devices ADM2485
Isolated RS-485 Transceiver
8
5
4
2
7
3
Pri
Sec
Primary windings and secondary
windings to be connected
in series on the PC board.
1
6
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.
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 Only pure water or alcohol recommended
• Developed specifically for Analog Devices ADM2485
Isolated RS-485 Transceiver for stepping up 5 V or 3.3 V to 6 V.
• Center tapped primary and secondary windings
• 2500 Vrms interwinding isolation.
Dimensions are in
inches
mm
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