Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
Surface Mount Zero Bias Schottky B8250
Detector Diodes Series
Pin Connection
Ordering Information
Package Part No.
SOT-26 B850XK6 -X.X
Description
The B-8250 line of zero bias Schottky detector diodes by
Bay Linear have been engineered for use in small signal
(Pin<-20 dBm) applications at frequencies below 2.0
GHz. The ideal applications are for RF/ID and RF Tags
where primary (DC bias) power is not available.
At Bay Linear, our commitment to quality components
gives our customers a reliable second source of products,
which are tested at a more stringent level than our
competitors. Manufacturing techniques assure that when
two diodes are mounted into a single package they are
taken from adjacent sites on the wafer.
In cross referenced parts, we guarantee pin to pin
compatibility. The various package configurations
available provide a low cost solution to a wide variety of
design problems.
Features
• Surface Mount SOT-23 3 Pin Packages
• SOT-143 Packages 4 Pin Packages
• Miniature SOT-323/363 3 pin and 6 pin
• High Detection Sensitivity:
up to 50mV/µW at 915 MHz
• Low Flicker Noise: -165 dBV/Hz at 100Hz
• Low reverse leakage
• Matched Diodes
• High Thermal Conductivity for greater Power
Bay Linear
Inspire the Linear Power
Pin Connections and
Package Marking
Notes:
1. Package marking provides
orientation and identification
2. See “Electrical Specifications”
for appropriate package marking
3
1
2
4
5
6
C4Z
3
1
2
4
5
6
C4ZC4Z
Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B8250
Equivalent Linear Circuit Model
RS=series resistance (see Table of SPICE parameters)
CJ = junction capacitance (see Table of SPICE parameters)
RJ = 8.33 X 10-5nT
where
Ib = externally applied bias current in amps
Is = saturation current (see table of SPICE parameters)
T = temperature, °K
n = ideality factor (see table of SPICE parameters)
SOT-23/SOT-143 Package
Lead Code Identification
(top view)
SINGLE SERIES
UNCONNECTED
3
12
2
3
1
4
PAIR
3
12
3
12
B 8255
B 8250 B 8252
SERIES
SOT-323 Package Lead
Code Identification
(top view)
SINGLE
3
12
3
12
SOT-23 Package 6 Lead
Code Identification
(top view)
UNCONNECTED
TRIO
BRIDGE
QUAD
13
56
2
4
13
56
2
4
SOT-23 Package 6 Lead
Code Identification
(top view)
UNCONNECTED
TRIO
BRIDGE
QUAD
13
56
2
4
13
56
2
4
B 8256 B 8254
Rj
Cj
RS
Rj
Cj
RS
Parameter Units B 825X
BV V 5.0
CJO pF 0.175
EG eV 0.68
IBV A 2.9 E-4
IS A 2.9 E-6
N 1.03
RS Ω 26
PB (VJ) V 0.350
PT(XT1) 1.95
M 0.49
SPICE PARAMETE
R
Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B8250
Absolute Maximum Ratings
Parameter Symbol SOT-23/143 SOT-323 Units
Peak Inverse Voltage PIV 2.0 2.0 V
Junction Temperature TJ 150 150 °C
Storage Temperature TSTG -65 to 150 -65 to 150 °C
Operating Temperature TNP -65 to 150 -65 to 150 °C
Thermal Resistance[2] θjc 500 150 °C/W
DC Electrical Specifications (TC = 25°C, Single Diode)
Part No. Package
Marking Configuration
Maximum
Forward Voltage
VF (mV)
Typical Capacitance
CT (pF)
8250
8251
8252
8253
8254
8255
8256
C0
C1
C2
C3
C4
C5
C6
Single
Single
Series Pair[2,3]
Series Pair[2,3]
Bridge Quad
Unconnected Pair[2,3]
Unconnected Trio
150 250
0.30
Test Conditions
IF=0.1 mA IF=1.0 mA
VF=-0.5V to -1.0V
F=1 MHz
DC Electrical Specifications, TC = +25°C, Diode Pairs
Part Number
Maximum Forward Voltage
Difference
∆VF (mV)
Maximum Capacitance Difference
∆CT (pF)
8252
8253
15 -0.5
Test Conditions
IF = 0.1mA
VF = -0.5V to -1.0 V
F = 1 MHz
Notes:
1. Operation in excess of any one of these conditions may result in permanent damage to the device
2. TC = +25°C, where TC is defined to be the temperature at the package pins where contact is made to the
circuit board
Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B8250
Graph 4: +25°C Output
Voltage vs. Temperature.
TEMPERATURE (°C)
010203040
50 60 70 80 90 100
0.9
1.1
1.3
1.5
1.7
1.9
2.1
2.3
2.5
2.7
2.9
3.1
OUTPUT VOLTAGE (mv)
FREQUENCY = 2.45 GHz
PIN = -40 dBm
RL= 100 KΩ
MEASUREMENTS MADE USING A
FR4 MICROSTRIP CIRCUIT.
Graph 3: +25°C Expanded Output Voltage
vs. Input Power. See Figure 2.
POWER IN (dBm)
30
10
1
0.3
-50 -40 -30
VOLTAGE OUT (mV)
915 MHz
RL= 100 KΩ
DIODES TESTED IN FIXED-TUNED
FR4 MICROSTRIP CIRCUITS.
Graph 1: Typical Forward Current
vs. Forward Voltage
V
F
- FORWARD VOLTAGE (V)
I
F
– FORWARD CURRENT (mA)
100
10
1
0.1
0.01
00.2 0.80.60.4 1.0 1.2 1.4 1.6 1.8
Graph 2: +25°C Output Voltage
vs. Input Power at Zero Bias
POWER IN (dBm)
VOLTAGE OUT (mV)
10000
1000
100
10
1
0.1
-50 -40 -30 -20 -10 0
915 MHz
R
L
= 100 KΩ
DIODES TESTED IN FIXED-TUNED
FR4 MICROSTRIP CIRCUITS.
Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations,
computer simulations and/ or initial prototype evaluation.
Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are
subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges.
The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit
design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any
industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different
applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application.
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Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical
implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without
the specific written consent of Bay Linear President.
