Transformer for
Analog Devices RS-485 Transceivers
- Developed for use with ADI's ADM2482E and ADM2487E RS-485 Transceivers
- Center tapped primary and secondary
- 5 V to 3.3 V primary to secondary voltage
- 2500 Vrms primary to secondary isolation
- RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations.
SPECIFICATIONS
Dimensions
Schematic 
Tape and reel specifications 
3D model
|
Part number1 Click to get parts |
Pri/sec voltage |
Inductance2 min (µH) |
DCR max (Ohms)3 |
Leakage inductance4 max (µH) |
Volt-time product5 (Vµsec) |
Power6 (W) |
Turns ratio pri : sec |
|
|---|---|---|---|---|---|---|---|---|
| 1/2 pri | 1/2 sec | |||||||
| GA3157-AL_ | 5 V to 3.3 V | 45.6 | 0.130 | 0.155 | 1.14 | 34.4 | 7.2 | 1 : 0.88 |
| 1 | When ordering, please specify termination and packaging codes: e.g. GA3157-ALD | |
| 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 parts 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 (half the primary) at 500 kHz, 0.5 Vrms, 0 Adc. | ||
| 3 | DCR is for each half of the primary and secondary at 25°C. For other operating temperatures, use this DCR at Temperature calculator. | ||
| 4 | Leakage inductance is for the primary with both windings connected in series and with the secondary windings shorted. | ||
| 5 | Volt-time product based on Bsat of the core at 25°C and number of turns on winding 4-3 (half the primary). | ||
| 6 | Calculated output power based on 150 kHz operating frequency. Power varies depending on application. | ||
| 7 | Ambient temperature range: | −40°C to +125°C | |
| 8 | Storage temperature range: | Component: −40°C to +125°C Tape and reel packaging: −40°C to +80°C |
|
| 9 | Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between. | ||
| 10 | Electrical specifications at 25°C. | ||
| Refer to Soldering Coilcraft Components before soldering. | |||
| PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info. | |||
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