ST458RFW Datasheet, PDF (1/3 Pages) Coilcraft lnc. – WidebandTransformersforCriticalApplications

Wideband Transformers
Wideband Transformers for Critical Applications
■ Miniature wideband transformer: 4 mm square 3 mm high
■ 300 V interwinding isolation, 1/4 Watt RF input power
■ 250 mA max current rating
Core material Ferrite
Terminations  Tin-silver-copper over silver-platinum-glass frit. Other
terminations available at additional cost.
Ambient temperature  –40°C to +85°C
Storage temperature  Component: –55°C to +85°C.
Tape and reel packaging: –55°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)
Packaging  750/7″reel; 3000/13″ reel  Plastic tape:  12 mm wide,
0.3 mm thick, 8 mm pocket spacing, 2.9 mm pocket depth

Impedance
^  ratio² Bandwidth
  _{Part number}1
Schem. pri : sec
(MHz)
ST458RFW01A1LZ
A
ST458RFW01B1LZ
B
ST458RFW02B1LZ
B
ST458RFW03B1LZ
B
ST458RFW04B1LZ
B
1 : 1
0.400 – 600
1 : 1
0.250 – 750
1 : 2
0.200 – 500
1 : 3
0.300 – 900
1 : 4
0.250 – 750
ST458RFW04B2LZ
B
ST458RFW04B3LZ
B
ST458RFW04B4LZ
B
ST458RFW08B1LZ
B
ST458RFW09B1LZ
B
1 : 4
1.500 – 1200
1 : 4
0.500 – 1000
1 : 4
0.300 – 700
1 : 8
0.150 – 600
1 : 9
0.300 – 500
ST458RFW16B1LZ
B
ST458RFW04C1LZ
C
1 : 16
1 : 4
0.600 – 300
0.250 – 800
Insertion        Pins ^{1 – 3 (primary)       Pins 4 – 6 (secondary)} DC
loss max ^  L min^{3  } DCR max^{4  } L min^{3  } DCR max^{4  } imbalance⁵
(dB)
(µH) (mOhm) (µH) (mOhm) max (mA)
0.40
10
120
10
120
—
0.58
9.5
75
9.5
75
36
0.50
10
120
20
150
8.5
0.60
9.0
100
27
150
8.5
1.0
9.0
55
36
120
30
2.0
2.0
50
8.0
100
15
0.90
5.0
80
20
120
10
0.65
9.0
80
36
200
7.5
0.60
22
120
176
310
17
0.54
9.0
80
81
230
5.0
0.80
5.0
80
80
230
5.0
1.0
9.0
60
36
120
30
1. When ordering, please specify termination and testing codes:
ST458RFW04C1LZ
Termination: L = Tin-silver-copper (95.5/4/0.5) over silver palladium-platinum-glass frit.
Special order: S = Tin-lead (63/37).
Testing: Z = COTS
H = Screening per Coilcraft CP‑SA‑10001
2. Impedance ratio is for the full primary winding to the full secondary winding.
3. Inductance measured at 100 kHz, 0.1 V, 0 Adc on an Agilent/HP 4192 or equivalent.
4. DCR measured on a micro-ohmmeter.
5. DC imbalance is the maximum difference in current measured at pins 4 and 6 with the source at pin 5.
Inductance drop is 15% at maximum imbalance.
6. Electrical specifications at 25°C. Measurements are referenced to 50 Ohms.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Schematics
A¹
Pri
3
B¹
Pri
3
6
Sec
4
6
5 ^Sec
4
C¹
6
Pri 2
5 Sec
© Coilcraft, Inc. 2012
3
4
®
Specifications subject to change without notice.
Please check our website for latest information. Document ST424-1  Revised 03/09/12
1102 Silver Lake Road
Cary IL 60013
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