QT310 Datasheet, PDF (1/20 Pages) Quantum Research Group – PROGRAMMABLE CAPACITANCE SENSOR IC

LQ
QPROX^™ QT310
PROGRAMMABLE CAPACITANCE SENSOR IC
Single channel digital advanced capacitance sensor IC
Spread spectrum burst modulation for high EMI rejection
Full autocal capability
User programmable via cloning process
Internal eeprom storage of user setups, cal data
Variable drift compensation & recalibration times
BG and OBJ cal modes for learn-by-example
Sync pins for daisy-chaining or noise suppression
Variable gain via Cs capacitor change
Selectable output polarity, high or low
Toggle mode (optional via setups)
Push-pull output
Completely programmable output behavior
via cloning process from a PC
HeartBeat™ health indicator (can be disabled)
APPLICATIONS
Fluid level sensors
Industrial panels
Appliance controls
Security systems
Access controls
Material detection
Micro-switch replacement Toys & games
This device requires only a few external passive parts to operate. It uses spread-spectrum burst modulation to dramatically
reduce interference problems.
The QT310 charge-transfer (“QT’”) touch sensor IC is a self-contained digital IC capable of detecting proximity, touch, or fluid
level when connected to a corresponding type of electrode. It projects sense fields through almost any dielectric, like glass,
plastic, stone, ceramic, and wood. It can also turn metal-bearing objects into intrinsic sensors, making them respond to
proximity or touch. This capability coupled with its ability to self calibrate continuously or to have fixed calibration by example
can lead to entirely new product concepts.
It is designed specifically for advanced human interfaces like control panels and appliances or anywhere a mechanical switch
or button may be found; it can also be used for material sensing and control applications, and for point-level fluid sensing.
The ability to daisy-chain permits electrodes from two or more QT310’s to be adjacent to each other without interference. The
burst rate can be programmed to a wide variety of settings, allowing the designer to trade off power consumption for response
time.
The IC’s RISC core employs signal processing techniques pioneered by Quantum; these are specifically designed to make
the device survive real-world challenges, such as ‘stuck sensor’ conditions and signal drift. All operating parameters can be
user-altered via Quantum’s cloning process to alter sensitivity, drift compensation rate, max on-duration, output polarity,
calibration mode, Heartbeat™ feature, and toggle mode. The settings are permanently stored in onboard eeprom.
The Quantum-pioneered HeartBeat™ signal is also included, allowing a host controller to monitor the health of the QT310
continuously if desired.
By using Quantum’s advanced, patented charge transfer principle, the QT310 delivers a level of performance clearly superior
to older technologies yet is highly cost-effective.
LQ
AVAILABLE OPTIONS
TA
0⁰C to +70⁰C
-40⁰C to +85⁰C
SOIC
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QT310-IS
8-PIN DIP
QT310-D
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Copyright © 2002 QRG Ltd
QT310/R1.03 21.09.03