CeramicBandpass Filter50Ω

BFCQ-3852A+

37 to 40 GHz

The Big Deal

• Innovative and industry leading• 5G n260 bandpass filter• Low Insertion Loss – Mid band 2.5dB typical• Surface mountable pick and place standard case style• Small size 2.5mm x 2.0mm• High quality distributed filter topology• Wide rejection band

CASE STYLE: NL1008C-6

Product Overview

The BFCQ-3852A+ LTCC Bandpass Filter covers the 5G n260 band. This corresponds to a passband of 37
to 40 GHz, with as low as 2.5dB passband loss, and up to 40dB stopband rejection. This model handles up
to 1W RF input power and provides a wide operating temperature range from -55 to +125°C. Utilizing a proprietary
LTCC material system and a distributed filter topology, this filter is able to achieve repeatable performance on alot-to-lot basis, up to mmWave frequencies.

Key Features
FeatureAdvantages

5G n260 band compatible

Designed for 5G Telecommunications, n260 band, 37 – 40 GHz

Proprietary mmWave compatible
LTCC material system

Low loss and repeatable performance on a lot-to-lot basis up to mmWave frequencies.

Cost effective

LTCC is scalable technology that allows for cost reduction at volume.

Small size (2.5mm x 2.0mm)

Allows for high layout density of circuit boards, while minimizing effects of parasitics.

Surface Mountable

Suitable for very high volume automated assembly process.

Notes
A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document.
B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions.
C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitledto the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp

Mini-Circuits®

www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com

Page 1 of 3

Ceramic

Bandpass Filter50Ω

BFCQ-3852A+

37 to 40 GHz

Generic photo used for illustration purposes onlyFeatures

CASE STYLE: NL1008C-6• Standard miniature 1008 package case style• 5G n260 band compatible• Shielded construction preventing filter from de-tuning• Reduced footprint area by employing LGA (land grid array)• Suited for very high-volume production• Surface mountable+RoHS Compliant
The +Suffix identifies RoHS Compliance. See our web sitefor RoHS Compliance methodologies and qualifications

Electrical Specifications1 at 25°C
ParameterApplications

F#Center Frequency• 5G Telecommunications

Insertion Loss

F1-F2

Return Loss (In)
Return Loss (Out)F1-F2

Stop Band, Lower

Insertion Loss

DC-F3

Stop Band, Upper

Insertion Loss

F4-F5

Pass Band

Functional Schematic

Frequency (GHz)

Min.

Typ.

Max.

Unit

38.5
2.9
2.5
10105545253630

—
—
3.4—
—
—
—
—
—
—

GHz

37 - 38.6
38.6 - 40
37 - 40
37 - 40
0.1 - 28
28 - 33.2
44.8 - 47
47 - 54
54 - 58

——
—
—
—
45
30
2030
20—dBdBdBdBdB

1. Measured on Mini-Circuits Test Board TB-BFCQ-3852AC+ with feedline losses removed by normalization of S12 and S21 traces tomeasurement of TB thru-line.

Maximum Ratings
Operating Temperature
Storage Temperature
RF Power Input-55°C to 125°C-55°C to 125°C
1W

Permanent damage may occur if any of these limits exceeded.

Typical Performance Data at 25°C
Frequency(MHz)

Typical Frequency Response
F2F4F5INSERTION LOSS (dB)F1

BFCQ-3852A+
INSERTION LOSS
INSERTION LOSS (dB)

1INSERTION LOSS (dB)

0102030405060708090100010000

20000

30000

40000

FREQUENCY (MHz)

50000

85.26
70.51
64.52
73.53
75.86
60.17
51.82
2.10
1.60
1.61
36.70
36.70
48.91
36.29
31.74

0.05
0.38
0.57
0.88
1.30
1.15
1.82
13.39
13.18
14.39
1.57
1.57
1.59
2.03
2.27

60000

BFCQ-3852A+
INSERTION LOSS (Zoomed)

23435000

37000

39000

BFCQ-3852A+
RETURN LOSS

0RETURN LOSS (dB)F3Return Loss
(dB)

10
5000
10000
20000
25000
30000
34000
37000
38500
40000
45000
45000
50000
58000
60000

FREQUENCY (MHz)DC

Insertion Loss(dB)

41000

43000

FREQUENCY (MHz)51015202530010000

20000 30000 40000
FREQUENCY (MHz)

50000

Notes
A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document.
B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions.
C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitledto the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp

Mini-Circuits®

www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com

60000

REV. OR
ECO-007929
BFCQ3852A+
DL/CP210614
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BFCQ-3852A+

Bandpass Filter

Pad Connections

Outline Drawing

INPUT

1

OUTPUT

2

GROUND

3Product Marking: NSEvaluation Board MCL P/N: TB-BFCQ-3852AC+Suggested PCB Layout (PL-707)

Outline Dimensions ( inchmm )
A.098
2.49

B.079
2.01C.028
0.71

D.024
0.6

E.024
0.6

F.020
0.51

G.012
0.3

H.008
0.2

J.004
0.1

K.004
0.1

wt
grams.019

Notes
A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document.
B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions.
C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitledto the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp

Mini-Circuits®

www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com

Page 3 of 3