Page 1
KV1845E
VARIABLE CAPACITANCE DIODE
FEATURES
■ Very Small URD Surface Mount Package
■ Very Low Series Resistance
■ Large Capacitance Ratio (A = 2.2 minimum)
■ Excellent Linearity (CV Curve)
■ Very Small Capacitance Deviation at Tape/Reel
DESCRIPTION
The KV1845E is a variable capacitance diode designed for
UHF applications.
The KV1845E is available in a very small URD Surface
Mount Package.
CLASSIFICATION
RANK
C
MIN 9.45 9.80 10.75
C
1
MAX 10.05 11.00 11.35
12 3
(Unit: pF)
APPLICATIONS
■ UHF Communications Equipment
■ Voltage Controlled Oscillator
■ 900 MHz Communications Systems
KV1845E
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
KV1845E
Tape/Reel Code
TAPE/REEL CODE
TR: Tape Right
October 1999 TOKO, Inc. Page 1
Page 2
KV1845E
ABSOLUTE MAXIMUM RATINGS
Reverse Voltage....................................................... 15 V
Forward Current ...................................................... 7 mA
Power Dissipation ................................................ 25 mW
ELECTRICAL CHARACTERISTICS
Test conditions: T
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
= 25 °C
A
Storage Temperature Range ................... -55 to +150 °C
Operating Temperature Range ...................-55 to +85 °C
V
REV
I
REV
C
1
C
4
R
S
A Capacitance Ratio C
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.
Reverse Voltage I
Reverse Current V
Diode Capacitance 1 V
Diode Capacitance 4 V
= 1 µA 10 V
REV
= 10 V 5.00 nA
REV
= 1 V, f = 1 MHz 9.45 10.40 11.35 pF
REV
= 4 V, f = 1 MHz 4.15 4.67 5.19 pF
REV
Series Resistance C = 5 pF, f = 470 MHz 0.25 0.30
/ C
1
4
2.20
Ω
Page 2 October 1999 TOKO, Inc.
Page 3
TYPICAL PERFOMANCE CHARACTERISTICS
I
(
A)
KV1845E
CAPACITANCE vs.
REVERSE VOLTAGE
100
10
CAPACITANCE (pF)
1
0 2 4 6
V
(V)
REV
REVERSE CURRENT vs.
REVERSE VOLTAGE
0.01
n
0.001
REV
TA = 25 °C
f = 1 MHz
TA = +85°C
TA = +55°C
SERIES RESISTANCE
vs. REVERSE VOLTAGE
1.0
f = 470 MHz
(Ω)
S
R
0.1
0 2 4 6
V
(V)
REV
QUALITY FACTOR vs.
REVERSE VOLTAGE
1000
Q
300 MHz
100
TA = 25 °C
f = 50 MHz
100 MHz
470 MHz
C (TA °C)/C (25 °C)
1.08
1.06
1.04
1.02
1.00
0.98
C (TA C)/C (25 C)
0.96
0.94
0.92
1.00
(Ω)
S
R
vs. REVERSE VOLTAGE
TA = 85 °C
55 °C
25 °C
-15 °C
-55 °C
0 1 2 3 4 5 6
V
(V)
REV
SERIES RESISTANCE
vs. FREQUENCY
f = 1 MHz
VR = 3.5 V
TA = 25 °C
TA = +25°C
0.0001
0 2 4 6 8 10
V
(V)
REV
TEMPERATURE-COEFFICIENT
1000
(ppm/ C)
A
∆C/ ∆T
100
vs. REVERSE VOLTAGE
TA = -55 °C to 85 °C
f = 1 MHz
0 2 4 6
V
(V)
REV
10
0 2 4 6
V
(V)
REV
0.10
100 1000
FREQUENCY (MHz)
October 1999 TOKO, Inc. Page 3
Page 4
KV1845E
PACKAGE OUTLINE
URD
0.2 min
1.7
+ 0.3
2.5
Cathode Mark
Marking
+0.15
-0.05
0.13
1.25
0.8
0.8
2.3
Recommended Mount Pad
0.3
Marking Information
Product Code S
0.9
0 ~ 0.1
Dimensions are shown in millimeters
Tolerance: x.x = ± 0.2 mm (unless otherwise specified)
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.
Page 4 October 1999 TOKO, Inc.
© 1999 Toko, Inc.
All Rights Reserved
IC-xxx-KV1845E
0798O0.0K
Printed in the USA
Loading...