Datasheet > QT301-D

QT301-D

更新时间： 2024-02-23 04:57:45

品牌	Logo	应用领域
昆腾 - QUANTUM		/
页数	文件大小	规格书
11页	264K
描述
CAPACITANCE TO ANALOG CONVERTER

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中文翻译

获取价格

技术参数
数据手册

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QT301-D 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	,	Reach Compliance Code：	unknown
风险等级：	5.92	Is Samacsys：	N
Base Number Matches：	1

QT301-D 数据手册

QT301

CAPACITANCE TO

NALOG

CONVERTER

ꢀ Capacitance to Analog Converter (CAC) IC

ꢀ Patented charge-transfer conversion method

ꢀ Sub-ranging Direct-to-Analog conversion

ꢀ Rescaleable PWM: wide dynamic range

ꢀ End-to-end calibration (gain, span) via CAL pins

ꢀ 100 kHz PWM

SYNC

CAL_DN

SNS1

VDD

CAL_UP

PWM

ꢀ Spread spectrum acquisition bursts for low noise

ꢀ Sample on demand via Sync pin

VSS

SNS2

ꢀ Only one external sample capacitor

APPLICATIONS

ꢀ Fluid level sensors

ꢀ Moisture detection

ꢀ Position sensing

ꢀ Transducer driver

ꢀ Material sensors

ꢀ Proximity sensors

The QT301 charge-transfer (QT) IC is a self-contained Capacitance-to-Analog-Converter (CAC) capable of detecting

femotofarad level changes in capacitance. This part is designed primarily for stand-alone instrumentation applications.

Primary applications include fluid level sensors, distance sensors, material detectors, transducer amplifiers for pressure and

humidity sensing functions, and other uses requiring quantified capacitance data.

Unlike other Quantum products, the QT301 does not process its acquired data. Its only output is raw, unprocessed data in

filterable PWM form that can be translated into an analog voltage by a simple RC network. This allows the designer to treat

the device as a CAC for measurement applications.

The PWM range is set via two inputs that control the starting and ending point of the conversion range. For example, if the

capacitance range of Cx is from 27pF to 38pF, the QT301 can be calibrated so that the PWM zero point occurs at 27pF, and

the endpoint (255) occurs at 38pF. In this way, the PWM range is optimized for the zone of interest. These calibration points

are stored in internal EEPROM and do not have to be reacquired after a power reset. This means that the resolution of the

part can be compared easily to other methods that might otherwise require 12 or more bits of overall resolution.

The device operates on demand via a sync input pin. The sync input can also be used to avoid external noise sources and

cross-interference from adjacent QRG capacitive sensors. Unique among capacitance sensors, this device features

spread-spectrum burst modulation, permitting extremely high noise rejection characteristics for very robust signals even in

high EMI environments.

The device requires only a single sampling capacitor (Cs) to acquire signals. The value of this capacitor controls the gain of

the sensor, and it can be adjusted over 2½ decades of range from 1nF to 500nF. No external switches, opamps, or other

components are required.

AVAILABLE OPTIONS

T_A

0⁰C to +70⁰C

-40⁰C to +85⁰C

SOIC

QT301-IS

8-PIN DIP

QT301-D

QT301 R1.06 12/03

12 3 4 5 6 7...11

中文翻译

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与QT301-D相关器件

型号	品牌	获取价格	描述	数据表
QT301-IS	QUANTUM	获取价格	CAPACITANCE TO ANALOG CONVERTER
QT310	QUANTUM	获取价格	PROGRAMMABLE CAPACITANCE SENSOR IC
QT310-D	QUANTUM	获取价格	PROGRAMMABLE CAPACITANCE SENSOR IC
QT310-IS	QUANTUM	获取价格	PROGRAMMABLE CAPACITANCE SENSOR IC
QT320	QUANTUM	获取价格	2 CHANNEL PROGAMMABLE ADVANCED SENSOR IC
QT320-D	QUANTUM	获取价格	2 CHANNEL PROGAMMABLE ADVANCED SENSOR IC
QT320-IS	QUANTUM	获取价格	2 CHANNEL PROGAMMABLE ADVANCED SENSOR IC
QT332IC.A1A0	QT	获取价格	Single Color LED, High Efficiency Red, Red Clear, T-1 3/4, 5mm,
QT332IC.A1R0	QT	获取价格	Single Color LED, High Efficiency Red, Red Clear, T-1 3/4, 5mm,
QT332IC.A1R1	QT	获取价格	Single Color LED, High Efficiency Red, Red Clear, T-1 3/4, 5mm,

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