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MAS1641 – Capacitance Change Detection with Piezo Alarm

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Helsinki, Finland – 21 February 2019

MAS1641 – Capacitance Change Detection with Piezo Alarm

Micro Analog Systems Oy introduces a very low power single chip solution for a capacitance change detection and a piezo alarm. Typical applications include battery powered alarm systems detecting infusion liquid level drop or water leakage.

The MAS1641 can be configured to detect either capacitance reduction or increase over a threshold which is adjustable by external resistors. A very high sound pressure level (SPL) alarm is achieved by voltage boosting solution which is based on an inductor free, low EMI and high efficiency 3x charge pump. The output driver stage can drive up to 18Vpp intermittent alarm signal to the piezo just from a low 3V supply. It can operate from a low supply voltage down to 2.25V and it draws only a very low 36uA current when monitoring capacitance change.

The MAS1641 is available in a small QFN-16 3x3x0.75 mm package. Samples are available. Price for a QFN packaged device is USD 0.70 (1 000 pcs). For further information and samples, please contact Micro Analog Systems Oy at info-mas@mas-oy.com.

MAS6241 – 18Vpp Piezo Driver IC for Self-Drive Type Piezoelectric Sounders

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Helsinki, Finland – 21 February 2019

MAS6241 – Piezo Driver IC for Self-Drive Type Piezoelectric Sounders

Micro Analog Systems Oy introduces a high efficiency, easy to use and low cost solution for piezo sound applications requiring a high sound pressure level (SPL). Typical applications include piezo buzzers, alarm devices, white goods and handheld or portable devices with sound feature.

It is an inductor free low EMI and low profile solution for achieving a high sound pressure level. It includes a high efficiency 3x mode charge pump to boost input voltage to a high level. It can operate from a low supply voltage down to 2.2V and over a wide temperature range from -40°C to +125°C.

The MAS6241 is available in a small QFN-12 3x3x0.75 mm package. Samples are available. Price for a QFN packaged device is USD 0.67 (1 000 pcs). For further information and samples, please contact Micro Analog Systems Oy at info-mas@mas-oy.com.

MAS6260 – Li-ion and LiPo battery charger IC with LDO

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Helsinki, Finland – 21 February 2019 

MAS6260 – Li-ion and LiPo battery charger IC with LDO

Micro Analog Systems Oy introduces Li-ion and LiPo battery charger IC with LDO primarily intended for portable electronic products.

MAS6260 is a charger IC for single-cell Li-Ion and LiPo batteries. It includes 150mA low-dropout (LDO) regulator and protection functions for battery and the IC. Charging uses CC/CV algorithm and its fast charge current is programmable up to 400mA with an external resistor. Pre-charge and termination currents are determined relative to programmed fast charge current. The MAS6260 is available with three different floating voltage options; 4.2V, 4.35V and 4.4V.

The device has automatic power path control. When input supply voltage is available all power is taken from the input. That includes battery charging and loading from LDO and SYS pins. When valid input voltage is not available and the battery is not empty the device switches to battery power. MAS6260 includes battery overcharge, overdischarge and overtemperature protection. Additionally, there is overcurrent protection at the input (VIN) and at both outputs (SYS, LDO). There are four different faulty conditions at which the device gives distinctive fault condition signals. Charging and shutdown modes are controlled from the system. In shutdown mode the battery current consumption is minimized to maximize battery life.

Samples are available in a small DFN-12 3x3x0.75 mm package. Price for a DFN packaged device is USD 1.17 (1 000 pcs). For further information and samples, please contact Micro Analog Systems Oy at info-mas@mas-oy.com.

MAS6505 – 22-bit Low Power Low Noise Piezoresistive Sensor Signal Interface IC

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Helsinki, Finland – 19 June 2018 

MAS6505 – 22-bit Low Power Low Noise Piezoresistive Sensor Signal Interface IC

Micro Analog Systems Oy introduces piezoresistive sensor signal interface IC primarily intended for MEMS based pressure sensor modules. The device offers extremely low current consumption (down to 0.8 uA, one measurement in a second) which make it an ideal solution for battery powered and power critical applications. The heart of the IC comprises of a chopper amplifier with very low noise performance (0.27 uVrms) and delta-sigma analog-to-digital converter (ADC) with very high resolution (22-bit).

The MAS6505 can operate in very wide range of supply voltages (1.71 V…5.5 V) and over industrial temperature range (-40 °C…+90 °C). For temperature compensation purposes it supports two different temperature sensing methods; sensor bridge resistance sensing or using external temperature sensing diode. 512-bit EEPROM memory is available for storing sensor trimming and calibration coefficients on chip. The device is operated using standard I2C and SPI serial bus interfaces.

Samples are available in die form and in QFN-24 4x4x0.85 package. For further information and samples, please contact Micro Analog Systems Oy at info-mas@mas-oy.com.

 

MAS6251 – 35Vpp Piezo and LED Driver IC for Self Drive Type Piezo

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Helsinki, Finland – 3 November 2017 

MAS6251 – Piezo and LED Driver IC for Self Drive Type Piezo

Micro Analog Systems Oy introduces combined piezo and LED driver IC in a small QFN-16 3x3x0.75 mm package. It is a high efficiency, easy to use and low cost solution for piezo sound applications requiring highest sound pressure level (SPL). Typical applications include piezo buzzers, various alarm products, white goods and handheld or portable devices with sound feature. The MAS6251 includes LED driver which offers additional area and cost saving in many applications using LEDs.

The heart of the IC is a high efficiency synchronous boost DC/DC converter requiring only a small 0806 sized 2.2mH inductor. The output voltage is regulated and adjustable up to 17.5V by external resistors. The bridge-tied load (BTL) output of the piezo driver is capable of driving up to 35Vpp signal in a very wide supply voltage range from 1.2V to 5.5V. The piezo driver is designed for three terminal self drive type piezoelectric transducers which produce very loud sound at resonance frequency of the piezo.

The LED driver supports use of pulse-width modulation (PWM) dimming control and is capable of driving up to 15mA current. The LED current is adjustable by external resistor. When not used the device enters shut down operating mode (typ 0.11mA) to save power.

The MAS6251 is available in QFN-16 3x3x0.75 mm package. Samples are available. Price for a QFN packaged device is USD 0.98 (3 000 pcs). For further information and samples, please contact Micro Analog Systems Oy at info-mas@mas-oy.com.

MAS6250 – 35Vpp Piezo and LED Driver IC for Multi-Tone Sound

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Helsinki, Finland – 15 September 2017 

MAS6250 – Piezo and LED Driver IC for Multi-Tone Sound

Micro Analog Systems Oy introduces combined piezo and LED driver IC in a small QFN-16 3x3x0.75 mm package. It is a high efficiency, easy to use and low cost solution for piezo sound applications requiring high sound pressure level (SPL). Typical applications include piezo buzzers, various alarm products, white goods and handheld or portable devices with sound feature. The MAS6250 includes LED driver which offers additional area and cost saving in many applications using LEDs.

The heart of the IC is a high efficiency synchronous boost DC/DC converter requiring only a small 0806 sized 2.2mH inductor. The output voltage is regulated and adjustable up to 17.5V by external resistors. The bridge-tied load (BTL) output of the piezo driver is capable of driving up to 35Vpp signal in a very wide supply voltage range from 1.2V to 5.5V. In addition to multi-tone sound the device supports single-tone sound which frequency is adjustable by external resistor.

The LED driver supports use of pulse-width modulation (PWM) dimming control and is capable of driving up to 15mA current. The LED current is adjustable by external resistor. When not used the device enters shut down operating mode (typ 0.11uA) to save power.

The MAS6250 is available in QFN-16 3x3x0.75 mm package. Samples are available. Price for a QFN packaged device is USD 0.98 (3 000 pcs). For further information and samples, please contact Micro Analog Systems Oy at info-mas@mas-oy.com.

MAS6240 – Piezo Driver for Multi-Tone Sound in new smaller package

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Helsinki, Finland – 05 February 2016 

MAS6240 – Piezo Driver for Multi-Tone Sound in 2 x 2 QFN package

Micro Analog Systems Oy introduces new smaller 2 x 2 x 0.5 QFN package for MAS6240, a piezo driver IC designed to create a multi-tone sound. It is a high efficiency, easy and low cost IC for wrist watches, alarm clocks, GPS, PDAs and other handheld or portable solutions. Traditionally multi-tone sound has been implemented using an external inductor for each different output frequency. This has been solved with a new design also giving a wider audio bandwidth. The inductorless design causes significantly less disturbance to the surrounding circuits, making it an ideal choice for sensitive designs. Only four small value capacitors are needed in addition to a sound element. MAS6240 can also be used in other applications for example as a white LED driver.

MAS6240 can drive outputs up to 18 VP-P from single 3 V supply voltage. An input voltage amplification factor can be selected as 1, 2 or 3. The output can be selected as a single mode or a differential mode. A sound signal is feeded in a digital form. The digital sound signal also controls audio and shutdown states, so additional power on control is not needed. A shut down current is less than 1 ?A. The chip is available in 2 x 2 x 0.5 as well as 3 x 3x 0.75 mm 12 pin QFN packages and also as EWS tested wafer. Samples are available. Price for a QFN packaged device is USD 0.57 (3 000 pcs).
For further information and samples, please contact Micro Analog Systems Oy at info-mas@mas-oy.com

MAS6240smaller

Micro Analog Systems releases 24-bit Low Power Capacitive Sensor Signal Interface IC

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Helsinki, Finland – 15 November 2013

Micro Analog Systems Oy today announced MAS6510, a 24-bit Capacitive Sensor Signal Interface IC primarily intended for MEMS based pressure sensor modules.

The device uses a ratiometric capacitance to digital (CDC) principle employing a delta-sigma (DS) conversion technique, giving very good noise performance. Its current consumption is extremely low (47.9 ?A, one pressure conversion in a second with 17.5-bit resolution) and it can operate at low supply voltage from 1.8 V to 3.6 V which makes it an ideal solution for interfacing a capacitive sensor in power consumption critical portable applications. The effective number of bits (ENOB) of the CDC is 17.5-bits. The over sampling ratio (OSR) of the DS-converter has five values to choose from for further optimization between conversion accuracy, speed and current consumption. Two capacitance measurement modes are supported and the output can be proportional either to capacitance difference (CS-CR) or to capacitance ratio (CS-CR)/CS. The on chip temperature sensor serves temperature measurement and temperature compensation purposes. The MAS6510 also features supply voltage monitoring mode which is especially useful in battery operated systems. For communication standard 2-wire I2C bus and SPI serial interfaces are available.

FEATURES
• Low Standby Current Consumption 0.01 ?A Typ
• Very Low Supply Current: 3.3 ?A…47.9 ?A Typ
• Supply Voltage: 1.8 V…3.6 V
• Ratiometric >? Conversion
• Sensor Offset and Gain Adjustment
• Changing Capacitance Range 2pF…30pF
• Internal Offset Capacitance Matrix 0pF…22pF
• External Capacitance up to 40pF (or higher using external clock)
• Over Sampling Ratio: 4096, 2048, 1024, 512 and 256
• Conversion Times 5.8 ms…82.6 ms Typ
• On Chip Temperature Sensor -40°C…+85°C
• Internal Clock Oscillator
• 2-Wire Serial Data Interface (I2C Bus) and Serial Peripheral Interface (SPI)
• 256 Bit EEPROM Memory
• Good Noise Performance thanks to the >? Architecture
• VDD monitoring mode
MAS6510 is available in a QFN-16 4x4x0.75 package as well as tested wafers or dies in waffle pack. For further information and samples please contact Micro Analog Systems Oy.

 

About Micro Analog Systems
Founded in 1984, Micro Analog Systems Oy is a privately owned fabless
semiconductor house located in Helsinki, Finland. MAS supplies Application Specific
Standard Parts and ASICs for worldwide customer base. MAS current product
portfolio consists of time signal receiver ICs, crystal oscillator ICs and AD converters
for sensor applications as well as of other high performance analog ICs.

For More Information
Company Contact:
Juha Majakulma
Director
+358 50 331 5638
juha.majakulma@mas-oy.com

Micro Analog Systems releases 24-bit Low Power Piezo Resistive Sensor Signal Interface IC

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Helsinki, Finland – 3 October 2013

Micro Analog Systems Oy today announced MAS6503, a 24-bit Piezo Resistive Sensor Signal Interface IC primarily intended for MEME Based pressure sensor modules. The device uses a ratiometric AD-converter principle employing a delta-sigma (DS) conversion technique, giving very good noise performance. Its current consumption is extremely low (18.3 µA, one pressure conversion in a second at maximum resolution and including sensor bridge current) and it can operate at low supply voltage from 1.8 V to 3.6 V which makes it an ideal solution for interfacing a piezo-resistive sensor in power consumption critical portable applications. The effective number of bits (ENOB) of the ADC is 17.4 bits. The over sampling ratio (OSR) of the DS-converter has five values to choose from for further optimization between conversion accuracy, speed and current consumption. MAS6503 also features supply voltage monitoring mode which is especially useful in battery operated systems. The external sensor bridge can be used to sense not only pressure but also temperature, using the built-in sensor sampling switches. The MAS6503 communicates via a standard 2-wire I²C serial bus interface.