Alpha Industries, Inc. [781] 935-5150 •Fax [617] 824-4579 •Email sales@alphaind.com •www.alphaind.com 1
Specifications subject to change without notice. 6/99A
Surface Mount Schottky
Quad Mixer Diodes
Features
■Tight Parameter Distribution
■Available as Ring Quads, Crossover
Quads, Bridge Quads and Octoquads
■100% DC Tested
■Designed for High Volume Commercial
Applications
■Available in Tape and Reel Packaging
Description
Alpha Industries offers a series of low cost devices in a
SOT-143 package. They cover low, medium and high
barrier junctions as ring quads, crossover quads and
bridge quads. An octoquad ring is also offered for high
dynamic range applications. These devices are
constructed utilizing Alpha’s monolithic chip technology,
assuring uniformity of electr ical characteristics for each
junction. The low capacitance of Alpha’s ring and
crossov er quads are designed f or double balanced mix er
applications covering wireless frequencies into C-band.
The bridge quads are designated for modulators and
frequency multiplier applications. These diodes are 100%
DC tested and deliver tight parameter distribution,
minimizing performance variability. They compliment
Alpha’ s product line of Schottky singles and pairs a vailab le
in SC-70, SC-79, SOD-323, SOT-23 and SOT-143
packages. Available in tape and reel for pick and
place manufacturing.
Characteristic Value
Reverse Voltage (VR) Rated VB
Forward Current - Steady State (IF) 50 mA
Power Dissipation (PD) 75 mW
Storage Temperature (TST) -65°C to +150°C
Operating Temperature (TOP) -65°C to +150°C
Junction Temperature (TJ) 150°C
Soldering Temperature 260°C for 5 Seconds
ESD Human Body Model Class 1B
Absolute Maximum Ratings
VB∆∆VFRT1
@ 10 µµAC
JV
F@ 1 mA @ 10 mA
Barrier (V) @ 0 V @ 1 mA (mV) (ΩΩ)
(pF) (mV) SOT-143
Min. Max. Max. Ring Quad Crossover Quad Bridge Quad Octoquad
Low 2 0.3-0.5 200-270 10 8 ♦ SMS3926-022 ♦ SMS3926-023 ♦ SMS3929-021 ♦ SMS3938-026
Marking: SE4 Marking: SE5 Marking: SQE Marking: SUG
Medium 3 0.3-0.5 310-370 10 8 ♦ SMS3927-022 ♦ SMS3927-023 ♦ SMS3930-021 ♦ SMS3939-026
Marking: SX4 Marking: SJ5 Marking: SRE Marking: SVG
High 4 0.3-0.5 520-580 10 8 ♦ SMS3928-022 ♦ SMS3928-023 ♦ SMS3931-021 ♦ SMS3940-026
Marking: SK4 Marking: SK5 Marking: SSE Marking: STG
Electrical Specifications at 25°C (Per Junction)
♦ Available through distribution.
1. RTis the slope resistance.
All parameters are based upon a single junction.
Surface Mount Schottky Quad Mixer Diodes
2Alpha Industries, Inc. [781] 935-5150 •Fax [617] 824-4579 •Email sales@alphaind.com •www.alphaind.com
Specifications subject to change without notice. 6/99A
SPICE Model Parameters (Per Junction)
Parameter Unit SMS3926 SMS3927 SMS3928
SMS3929 SMS3930 SMS3931
SMS3938 SMS3939 SMS3940
IS A 2.5E-07 1.3E-09 9E-13
RSΩ4 4 4
N 1.04 1.04 1.04
TT S 1E–11 1E–11 1E–11
CJ0 pF 0.42 0.39 0.39
M 0.32 0.37 0.42
EGeV 0.69 0.69 0.69
XTI 2 2 2
FC0.5 0.5 0.5
BVV 2 3 4
IBV A 1.00E–05 1.00E–05 1.00E–05
VJV 0.495 0.595 0.800
All parameters are based upon a single junction.
Typical Forward Voltage Characteristics at 25°C
Part Number VF@ 0.01 mA (mV) VF@ 0.10 mA (mV) VF@ 1.0 mA (mV) VF@ 10.0 mA (mV)
Typ. Typ. Typ. Typ.
SMS3926 100 165 232 324
SMS3927 206 271 338 428
SMS3928 423 488 555 641
SOT-143
0.110 (2.80 mm) MIN.
0.120 (3.04 mm) MAX.
0.083 (2.10 mm) MIN.
0.104 (2.64 mm) MAX.
0.012 (0.30 mm) MIN.
0.020 (0.50 mm) MAX.
0.0005 (0.01 mm) MIN.
0.004 (0.15 mm) MAX.
0.031 (0.80 mm) MIN.
0.047 (1.20 mm) MAX.
0.030 (0.76 mm) MIN.
0.035 (0.89 mm) MAX.
0.047 (1.20 mm) MIN.
0.055 (1.40 mm) MAX.
0.003 (0.08 mm) MIN.
0.008 (0.20 mm) MAX.
0.022 (0.55 mm) REF.
8˚ MAX.
0.020 (0.50 mm) REF.
0.028 (0.70 mm) REF.
0.068 (1.72 mm) REF.
0.076 (1.92 mm) REF.
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