Dual Pico Amp Diodes
CORPORATION
DPAD1 / DPAD2 / DPAD5 / DPAD10 / DPAD20 / DPAD50 / DPAD100
SSTDPAD5 / SSTDPAD10 / SSTDPAD20 / SSTDPAD50 / SSTDPAD100
FEATURES
•
High OFF Isolation. . . . . . . . . . . . . . . . . 1 pA max DPAD1
Isolation between diodes. . . . . . Typical 20
f
A
•
ExcellentCapacitance
Matched
•
•
Op Amp Protection Devices
•
Diode Switching
•
High Impedance Protection
DESCRIPTION
Calogic’s ultra low leakage dual pico amp diodes out perform
conventional diodes for applications where reverse current
(leakage) is critical and must be kept at a minimum. The
devices have very low capacitance and are also fast
switching. Housed in a compact dual hermetic package and a
plastic surface mount SO-8 this product is also available in
chip form for hybrid uses.
ORDERING INFORMATION
Part
DPAD1
DPAD2/50
SSTDPAD5/100
XDPAD5/100
Package
Temperature Range
-55 to +150
o
C
-55 to +150
o
C
-55 to +150
o
C
-55 to +150
o
C
Hermetic TO-78
Hermetic TO-71
Plastic SO-8
Sorted Chips in Carriers
APPLICATIONS
PIN CONFIGURATION
TO-71
(MODIFIED)
(PINS 2 AND
6 REMOVED)
TO-78
(MODIFIED)
(DPAD1 ONLY)
N/C
A2
C2
C2
C1
C1
A1
N/C
SO-8
A
1
C
2
A
2
C
1
C
2
3
2
A
1
1
A
2
4
C
C
2
A
1
A
2
C
1
CASE
C
2 3
A
1
C
2
4
A
2
5
1
C
1
CJ1, CJ2, CJ4
C
1
BOTTOM VIEW
(ALTERNATE)
BOTTOM VIEW
SCHEMATIC DIAGRAM
A
C
C
A
DPAD1 / DPAD2 / DPAD5 / DPAD10 / DPAD20 / DPAD50 / DPAD100
SSTDPAD5 / SSTDPAD10 / SSTDPAD20 / SSTDPAD50 / SSTDPAD100
CORPORATION
ABSOLUTE MAXIMUM RATINGS (25
o
C)
Forward Gate Current, Each Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Total Device Dissipation @ T
A
= 25
o
C
Derate 4.0 mW/
o
C to 125
o
C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 mW
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125
o
C
Lead Temperature (1/16" from case for 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
o
C
ELECTRICAL CHARACTERISTICS
(25
o
C unless otherwise noted)
SYMBOL
STATIC
-1
-2
-5
I
R
Reverse Current
-10
-20
-50
-100
-45
BV
R
V
F
DYNAMIC
0.8
C
R
Capacitance
2.0
| CR1 - CR2 | Differential Capacitance
0.1
0.2
pF
V
R1
= V
R2
= -5 V, f = 1 MHz
pF
V
R
= -5 V, f = 1 MHz
DPAD10, 20, 50, 100
DPAD1, 2, 5, 10, 20, 50, 100
DPAD1, 2, 5
Breakdown Voltage (Reverse)
-35
Forward Voltage Drop
0.8
1.5
V
-120
I
R
= -1µA
DPAD10, 20, 50, 100
I
F
= 5 mA
DPAD1, 2, 5, 10, 20, 50, 100
pA
VR = -20 V
DPAD1
DPAD2
DPAD5
DPAD10
DPAD20
DPAD50
DPAD100
DPAD1, 2, 5
CHARACTERISTICS
MIN
TYP
MAX
UNIT
TEST CONDITIONS
DPAD10
_
D
1
D
3
+15V
D
2
+
D
4
-15V
e
in
I
R
< 1 pA
DPAD1
+V
-V
DPAD1
+
1
J110
C
CONTROL SIGNAL
J210
V
OUT
APPLICATION
Operational Amplifier Protection. Input Differential Voltage
limited to 0.8 V (typ) by DPADS D
1
and D
2
Common mode
input voltage limited by DPADS D
3
and D
4
to
±15V.
Typical sample and hold circuit with clipping, DPAD diodes
reduce offset voltages fed capacitively from the FET switch
gate.
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