The KV1851K is a variable capacitance diode designed for
UHF applications.
The KV1851K is available in a very small UFD Surface
Mount Package.
CLASSIFICATION
RANK
C
MIN
C
1
MAX
1
25.00
26.90
2
26.50
28.50
(Unit: pF)
3
28.10
30.00
KV1851K
Note: Rank is determined after testing and marked on the
reel. All the diodes on a reel have the same rank, but rank
can not be specified when ordering.
ORDERING INFORMATION
KV1851K
Tape/Reel Code
TAPE/REEL CODE
TR: Tape Right
August 1999 TOKO, Inc.
Page 1
KV1851K
ABSOLUTE MAXIMUM RATINGS
Reverse Voltage ....................................................... 18 V
Forward Current .................................................... 10 mA
Power Dissipation ................................................ 50 mW
Storage Temperature Range ................... -55 to +150
°C
Operating Temperature Range ................... -55 to +85
°C
ELECTRICAL CHARACTERISTICS
Test conditions: T
A
= 25
°C
SYMBOL
V
REV
I
REV
C
1
C
4
R
S
A
PARAMETER
Reverse Voltage
Reverse Current
Diode Capacitance 1
Diode Capacitance 4
Series Resistance
Capacitance Ratio
TEST CONDITIONS
I
REV
= 10 µA
V
REV
= 10 V
V
REV
= 1 V, f = 1 MHz
V
REV
= 4 V, f = 1 MHz
V
REV
= 4 V, f = 100 MHz
C
1
/ C
4
3.90
25.00
4.90
MIN
16
5.00
30.00
7.00
1.7
TYP
MAX
UNITS
V
nA
pF
pF
Ω
Note 1: Diode Capacitance measured with HP 4279A or equivalent instruments (at OSC level 20 mVrms,
±
5 mVrms).
Note 2: Series Resistance measured with HP 4191A or equivalent instruments.
Page 2
August 1999 TOKO, Inc.
KV1851K
TYPICAL PERFOMANCE CHARACTERISTICS
CAPACITANCE vs.
REVERSE VOLTAGE
100
TA = +25
°C
f = 1 MHz
1000
QUALITY FACTOR vs.
REVERSE VOLTAGE
TA = +25
°C
f = 50 MHz
100 MHz
CAPACITANCE (pF)
10
Q
100
1
0
1
2
3
4
5
6
7
8
9 10
VREV (V)
10
0
1
2
3
4
5
6
7
8
9 10
VREV (V)
SERIES RESISTANCE
vs. FREQUENCY
10
VREV = 5 V
TA = +25
°C
REVERSE CURRENT vs.
REVERSE VOLTAGE
10
TA = +85°C
1
+55°C
IREV (nA)
RS (Ω)
1
0.1
+25°C
0.01
0.1
10
100
FREQUENCY (MHz)
C (TA)
1000
0.001
0
2
4
6
8
10
12 14 16
VREV (V)
1.08
1.06
1.04
C (25
°C)
vs. REVERSE VOLTAGE
TEMPERATURE COEFFICIENT
vs. REVERSE VOLTAGE
1000
TA = -55
°C
to +85
°C
f = 1 MHz
TA = +85
°C
+55
°C
+25
°C
f = 1 MHz
C (25 C)
C (TA)
1.02
1.00
0.98
0.96
0.94
0.92
0
∆C
/∆ TA (ppm/ C)
5
6
7
8
9 10
-15
°C
-55
°C
1
2 3
4
VREV (V)
300
100
0
1
2
3
4
5
6
7
8
9 10
VREV (V)
August 1999 TOKO, Inc.
Page 3
KV1851K
PACKAGE OUTLINE
Marking Information
Product Code
1.7
Cathode Orientation Marking
Marking
0.8
UFD
E
+ 0.1
0.8
0.6
1.2
1.6
+ 0.1
+ 0.1
0.3
+ 0.05
Recommended Mount Pad
+ 0.1
Dimensions are shown in millimeters
Tolerance: x.x =
±
0.2 mm (unless otherwise specified)
0.11
+0.10
-0.05
Toko America, Inc. Headquarters
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070
Fax: (847) 699-7864
TOKO AMERICA REGIONAL OFFICES
Midwest Regional Office
Toko America, Inc.
1250 Feehanville Drive
Mount Prospect, IL 60056
Tel: (847) 297-0070
Fax: (847) 699-7864
Western Regional Office
Toko America, Inc.
2480 North First Street , Suite 260
San Jose, CA 95131
Tel: (408) 432-8281
Fax: (408) 943-9790
Eastern Regional Office
Toko America, Inc.
107 Mill Plain Road
Danbury, CT 06811
Tel: (203) 748-6871
Fax: (203) 797-1223
Semiconductor Technical Support
Toko Design Center
4755 Forge Road
Colorado Springs, CO 80907
Tel: (719) 528-2200
Fax: (719) 528-2375
Visit our Internet site at http://www.tokoam.com
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its
products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of
third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
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