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IH401A Datasheet

QUAD Varafet Analog Switch

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Semiconductor
April 1999
Features
NO
Call
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IH401A
QUAD Varafet Analog Switch
Description
• rDS(ON) (Typ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
• ID(OFF) (Typ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10pA
• Switching Times (RL = 1k)
- tON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25ns
- tOFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75ns
• Built-In Overvoltage Protection . . . . . . . . . . . . . . ±25V
• Charge Injection Error (Typ) into 0.01µF Capacitor . . 3mV
• CISS (Typ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <1pF
• Can Be Used for Hybrid Construction
Part Number Information
PART
NUMBER
IH401A
TEMP. RANGE
(oC)
PACKAGE
-55 to 125
16 Ld CERDIP
The IH401A is made up of 4 monolithically constructed
combinations of varacitor type diode and a N-Channel JFET.
The JFET itself is very similar to the popular 2N4391, and
the driver diode is specially designed, such that its
capacitance is a strong function of the voltage across it. The
driver diode is electrically in series with the gate of the
N-Channel FET and simulates a back-to-back diode
structure. This structure is needed to prevent forward biasing
the source-to-gate or drain-to-gate junctions of the JFET
when used in switching applications.
Previous applications of JFETs required the addition of
diodes, in series with the gate, and then perhaps a gate-to-
source referral resistor or a capacitor in parallel with the
diode; therefore, at least 3 components were required to
perform the switch function. The IH401A does this same job
in one component (with a great deal better performance
characteristics).
Like a standard JFET, the practically perform a solid state
switch function translator should be added to drive the diode.
This translator takes the TTL levels and converts them to
voltages required to drive the diode/FET system (typically a
0V to -15V translation and a 3V to +15V shift). With ±15V
power supplies, the IH401A will typically switch 22VP-P at
any frequency from DC to 20MHz, with less than 50
rDS(ON) .
Pinout
IH401A
(CERDIP)
TOP VIEW
S1 1
D1 2
DR1 3
4
DR2 5
S2 6
D2 7
8
16 D4
15 S4
14 DR4
13
12 DR3
11 S3
10 D3
9
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © Harris Corporation 1999
14-1
File Number 3128.2


Intersil Electronic Components Datasheet

IH401A Datasheet

QUAD Varafet Analog Switch

No Preview Available !

IH401A
Absolute Maximum Ratings
Thermal Information
Supply Voltage
VS to VD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
VG to VS, VD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V
Maximum Junction Temperature (Ceramic Package) . . . . . . . . . 175oC
Storage Temperature Range . . . . . . . . . . . . . . . . . . .-65oC to 150oC
Lead Temperature (Soldering, 10s). . . . . . . . . . . . . . . . . . . . . 300oC
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . .55oC to 125oC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of
the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Electrical Specifications At 25oC/125oC
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
Switch “ON” Resistance
Pinch-Off Voltage
Switch “OFF” Current or “OFF” Leakage
Switch “OFF” Leakage at 125oC
Switch “OFF” Current
Switch “OFF” Leakage at 125oC
Switch Leakage When Turned “ON”
AC Input Voltage Range without Distortion
Charge Injection Amplitude
Diode Reverse Breakdown Voltage. This
Correlates to Overvoltage Protection
rDS(ON)
VDRIVE = 15V,
VDRAIN = -10V,
ID = 10mA
VP ID = 1nA, VDS = 10V
ID(OFF)
VDRIVE = -15V,
VSOURCE = -10V,
VDRAIN = +10V
ID(OFF)
VDRIVE = -15V,
VSOURCE = -10V,
VDRAIN = +10V
IS(OFF)
VDRIVE = -15V,
VDRAIN = -10V,
VSOURCE = +10V
IS(OFF)
VDRIVE = -15V,
VSOURCE = -10V,
VDRAIN = +10V
ID(ON) = VD = VS = -10V,
IS(ON) VDRIVE= +15V
VANALOG See Figure 2
VINJECT See Figure 3
BVDIODE
VD = VS = -V,
IDRIVE = 1µA,
DRIVE = 0V
- 35 50
245
V
-
10 ±500
pA
- 0.25 50
nA
-
10 ±500
pA
- 0.3 50
nA
- 0.02 ±2
20 22
-3
-30 -45
-
-
-
nA
VP-P
mVP-P
V
Gate to Source or Gate to Drain Reverse
Breakdown Voltage
BVGSS
VDRIVE = -V,
VD = VS = 0V,
DRIVE = 1µA
30 41
-
V
Maximum Current Switch can Deliver (Pulsed)
IDSS
VDRIVE = 15V,
VS = 0V,
D = +10V
35 55
-
mA
Switch “ON” Time (Note 1)
tON
Switch “OFF” Time (Note 1)
tOFF
NOTE:
1. Driving waveform must be >100ns rise and fall time.
See Figure 1
See Figure 1
- 50 -
- 150 -
ns
ns
14-2


Part Number IH401A
Description QUAD Varafet Analog Switch
Maker Intersil Corporation
Total Page 5 Pages
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