Zetex (Now Diodes) FSD273TA, ZMDC953TA, ZV950V2TA, ZV952V2TA, ZV953V2TA Schematic [ru]
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950 series
SILICON LOW VOLTAGE HYPERABRUPT VARACTOR DIODES
ZV950V2, ZV952V2, ZV953V2, ZMDC953, FSD273
Device Description
A range of silicon varactor diodes for use in frequency control and filtering. Featuring closely controlled CV characteristics, low voltage operation and high Q. Low reverse current ensures very low phase noise performance. These parts can be used with control voltages from 0.5V to 2.5V, making them ideal for 3 volt systems. Available in miniature surface mount packages.
Features
•Close tolerance C-V characteristics
•Tuning from 0.5 to 2.5 Volts to suit 3 volt systems
•Low IR (typically 10pA)
•Excellent phase noise performance
•High Q at low voltage
•Miniature surface mount packages
•Band selection for DAB applications - FSD273
Applications
•VCXO and TCXO
•Wireless communications
•Pagers
•Mobile radio
•Digital Radio receivers
ISSUE 2 - MAY 2002
1
950 series
TUNING CHARACTERISTICS at Tamb = 25
C
PART |
CAPACITANCE pF |
CAPACITANCE pF |
CAPACITANCE |
Minimum Q |
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VR=0.5V, f=1MHz |
VR=1.5V, |
f=1MHz |
RATIO C0.5 / C2.5 |
VR=0.5V |
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f=1MHz |
f=50MHz |
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Min |
Min |
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Max |
Min |
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ZV950V2 |
9.5 |
6.3 |
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7.8 |
2.0 |
250 |
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ZV952V2 |
19 |
12.7 |
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15.7 |
2.0 |
250 |
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ZV953V2 |
45 |
30 |
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37 |
2.0 |
200 |
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ZMDC953(DUAL) |
45 |
30 |
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37 |
2.0 |
250 |
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ZMDC953 is available banded to tighter capacitance range. This product has the order code FSD273TA. Measured at VR=1.5V the bands are
Band A = 30.0 to 32.5
Band B = 32.3 to 34.7
Band C = 34.5 to 37.0
Product is supplied in reels. A banded reel will only contain a single band. Shipments containing several reels may have reels in different bands. It is not possible to supply a specific band as processing affects which bands are available
ABSOLUTE MAXIMUM RATINGS
PARAMETER |
SYMBOL |
MAX |
UNIT |
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Reverse voltage |
VR |
12 |
V |
Forward current |
IF |
100 |
mA |
Power dissipation at Tamb = 25 C SOD523 |
Ptot |
250 |
mW |
Power dissipation at Tamb = 25 C SOT323 |
Ptot |
300 |
mW |
ELECTRICAL CHARACTERISTICS at Tamb = 25°C
PARAMETER |
CONDITIONS |
MIN. |
TYP. |
MAX. |
UNIT |
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Reverse breakdown voltage |
IR = 10uA |
12 |
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V |
Reverse voltage leakage |
VR = 8V |
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0.010 |
20 |
nA |
ISSUE 2 - MAY 2002
2
950 series
TYPICAL CHARACTERISTICS
100 |
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1.4 |
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Resistance( ) |
Tj = 25°C |
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1.2 |
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ZV953V2 |
1.0 |
ZV950V2 |
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10 |
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ZMDC953 |
0.8 |
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Capacitance(pF) |
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ZV952V2 |
0.6 |
ZV952V2 |
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0.4 |
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ZV950V2 |
ZV953V2 |
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J |
Tj = 25°C |
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Series |
0.2 |
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C |
f = 1MHz |
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ZMDC953 |
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S |
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1 |
0.1 |
1 |
10 |
R |
0.010 |
100 |
1000 |
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VR Reverse Voltage (V) |
Frequency (MHz) |
Capacitance v Reverse Voltage |
Series Resistance v Frequency |
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1.08 |
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1000 |
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Capacitance |
1.06 |
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Tj |
= 85°C |
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(ppm/°C) |
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Tj = -55°Cto +85°C |
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1.04 |
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Tj = 55°C |
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800 |
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f = 1MHz |
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1.02 |
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600 |
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Normalised |
1.00 |
Tj |
= 25°C |
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C |
400 |
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0.98 |
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/T |
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0.96 |
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J |
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Tj = -15°C |
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200 |
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0.94 |
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Tj = -55°C |
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0.920 |
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00 |
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1 |
2 |
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5 |
6 |
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1 |
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5 |
6 |
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VR Reverse Voltage (V) |
VR Reverse Voltage (V) |
Normalised Capacitance v Voltage |
CJ Temperature Coefficient v VR |
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1000 |
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(pA) |
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+85°C |
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Leakage |
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100 |
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+55°C |
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Reverse |
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10 |
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+25°C |
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R |
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I |
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10 |
2 |
4 |
6 |
8 |
10 |
12 |
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VR Reverse Voltage (V)
Leakage v Reverse Voltage
ISSUE 2 - MAY 2002
3