CA3098 Datasheet, PDF (1/12 Pages) Intersil Corporation – Programmable Schmitt Trigger with Memory, Dual Input Precision Level Detector

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CA3098
January 1999
File Number 896.5
Programmable Schmitt Trigger with
Memory, Dual Input Precision Level
Detector
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The CA3098 Programmable Schmitt Trigger is a monolithic
silicon integrated circuit designed to control high operating
current loads such as thyristors, lamps, relays, etc. The
CA3098 can be operated with either a single power supply
with maximum operating voltage of 16V, or a dual power
supply with maximum operating voltage of ±8V. It can
directly control currents up to 150mA and operates with
microwatt standby power dissipation when the current to be
controlled is less than 30mA. The CA3098 contains the
following major circuit function features (see Block Diagram):
1. Differential amplifiers and summer: the circuit uses two
differential amplifiers, one to compare the input voltage
with the “high” reference, and the other to compare the
input with the “low” reference. The resultant output of the
differential amplifiers actuates a summer circuit which
delivers a trigger that initiates a change in state of a flip-
flop.
2. Flip-flop: the flip-flop functions as a bistable “memory”
element that changes state in response to each trigger
command.
3. Driver and output stages: these stages permit the circuit
to “sink” maximum peak load currents up to 150mA at
terminal 3.
4. Programmable operating current: the circuit incorporates
access at terminal 2 to permit programming the desired
quiescent operating current and performance parameters.
Pinout
CA3098
(PDIP)
TOP VIEW
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LOW REF. 1
I_BIAS 2
OUT 3
V- 4
8 +IN
7 HIGH REF.
6 V+
5 CURRENT
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Features
• Programmable Operating Current
• Micropower Standby Dissipation
• Direct Control of Currents Up to . . . . . . . . . . . . . . . 150mA
• Low Input On/Off Current of Less Than 1nA for
Programmable Bias Current of 1µA
• Built-in Hysteresis . . . . . . . . . . . . . . . . . . . . . 20mV (Max)
Applications
• Control of Relays, Heaters, LEDs, Lamps, Photosensitive
Devices, Thyristors, Solenoids, etc.
• Signal Reconditioning
• Phase and Frequency Modulators
• On/Off Motor Switching
• Schmitt Triggers, Level Detectors
• Time Delays
• Overvoltage, Overcurrent, Overtemperature Protection
• Battery-Operated Equipment
• Square and Triangular-Wave Generators
Part Number Information
PART
NUMBER
TEMP
RANGE (^oC)
PACKAGE PKG. NO.
CA3098E
-55 to 125 8 Ld PDIP
E8.3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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