PDF EM6420 Data sheet ( Hoja de datos )

Número de pieza	EM6420
Descripción	Ultra Low Power Capacitive Touch Sensor Interface IC
Fabricantes	EM Microelectronic
Logotipo
Hay una vista previa y un enlace de descarga de EM6420 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas
No Preview Available ! EM MICROELECTRONIC - MARIN SA EM6420www.DataSheet4U.com Ultra Low Power Capacitive Touch Sensor Interface IC Description The EM6420 is an ultra low power Touch Sensor Interface IC able to scan sequentially up to 16 capacitive sensors. The device parameters (number of used sensors, sensors scan frequency, sensors sensitivity level, IRQ condition) are configurable either from a host microcontroller through a communication port or through configuration inputs. Recognised touch inputs will be signaled with an active edge at the IRQ pad and data are ready to be read through the communicaion port by the host MCU. Conditions for the IRQ to get active are configurable : at the end of every scan, at the end of a scan if at least one sensor is active or at the end of a scan if the sensors state has changed. The EM6420 can also detect the most active sensor in applications where sensors are tightly spaced. It compares relative levels among sensors and selects the sensor with the largest signal strength. To increase the number of sensors >16, use several EM6420 in parallel. Depending on the selected supply voltage range, 3 or 4 decoupling capacitors are required for the entire functionality of the EM6420 from -40 to + 85°C. Features Up to 16 analogue sensor inputs User selectable communication interfaces : 4-wire SPI, I2C, 4-bit parallel interface and 8-bit direct output User-selectable active edge IRQ output signal Active high enable input No software development and tuning required Development tools and documentations available Complete touch module available: IC + electrodes design on various non-conductive substrates Electrical Characteristics Supply voltage Power consumption Low Power Mode Ultra Low Power Mode 1.2 V to 2.0 V or 2.2 to 3.6 V 8.0 µA @ 3.0 V (14.5 µA @1.5 V) for 16 sensors scanned at 8 Hz 2.0 µA @ 3.0 V (5.0 µA @1.5 V) for 16 sensors scanned at 8 Hz Nominal sensor capacitance 3 to 31 pF Sensors frequency scan 1 Hz to 128 Hz *frequency depending on number of sensors COM clock frequency up to 400 kHz Availability Naked die SMT package MLF32-36-40 Design Considerations The EM6420 is well suited for battery and mains powered applications where the following features are important : Tamper proof applications Nice and clean designs Touch function to avoid buttons and keys Slider functions Hygienic issues, cleaning aspects Waterproof designs Applications Mobile phones, cordless phones PDA, keyboards White & brown goods Toys Lighting - Sliders for dimming Copyright 2010, EM Microelectronic-Marin SA 6420-DS.doc, Version 2.0, 10-Jun-10 1 www.emmicroelectronic.com 1 page EM6420www.DataSheet4U.com 2. GENERAL DESCRIPTION The EM6420 is a very low power ASIC that includes a Touch Screen interface able to handle up to 16 capacitive sensors. Several devices can be used in parallel to manage more than 16 sensors. The application parameters (number of used sensors, sensors scan frequency, sensors sensitivity level, IRQ condition …) are fully configurable either from a host microcontroller through a communication port or from several configuration inputs. Host Microcontroller IO IRQ COM port VDD 100 nF IRQ VDD COM port S0 - S15 Connexion to Touch Screen Sensors EM6420 IO En_TSI En VDDA COMCfg port VSS VDDD 22 nF 100 nF Figure 2-1: Typical Operating Configuration Depending on the IRQ condition parameter, a user-selectable IRQ active edge can be generated: At the end of every scan. At the end of a scan if the sensors state has changed. At the end of a scan if either the sensors state has changed or at least one sensor is active. The sensors state can then be read by the host microcontroller through the communication port. The EM6420 can also detect the most activated sensor in applications where sensors are tightly spaced by comparing relative levels among sensors and by selecting the one with the largest signal strength. Supply voltage range can be selected either from 1.2 V to 2.0 V or from 2.2 V to 3.6 V. Depending on selected supply voltage range, 3 or 4 decoupling capacitors are required for overall functionality. No other external component is needed. The EM6420 can operate over a wide temperature range, from -40°C to +85°C. It is available in die form or in different SMT packages. Ultra low current consumptions have been achieved with the EM6420 starter kit1, typically2 : 8.0 µA @ 3.0 V (14.5 µA @1.5 V) for 16 sensors scanned at 8 Hz in Low Power Mode 2.0 µA @ 3.0 V (5.0 µA @1.5 V) for 16 sensors scanned at 8 Hz in Ultra Low Power Mode 5.0 µA @ 3.0 V (9.0 µA @1.5 V) for 8 sensors scanned at 2 Hz in Low Power Mode 0.7 µA @ 3.0 V (1.2 µA @1.5 V) for 8 sensors scanned at 2 Hz in Ultra Low Power Mode 1 Please ask EM Microelectronic-Marin SA for EM6420 starter kit availability 2 Other values may be obtained depending on electrode design and selected parameters Copyright 2010, EM Microelectronic-Marin SA 6420-DS.doc, Version 2.0, 10-Jun-10 5 www.emmicroelectronic.com 5 Page High supply voltage range configuration Low supply voltage range configuration EM6420www.DataSheet4U.com VDD CVDD 100 nF En IRQ CIO0 CIO1 CIO2 CIO3 CIO4 CIO5 CIO6 CIO7 CI8 CIS0 CIS1 CIS2 TCK TIC VDD LSV VSS EM6420 S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 CBH CBL VCP VDDD VDDA VDD CVDDA 22 nF CVDDD 100 nF VDD CVDD 100 nF En IRQ CIO0 CIO1 CIO2 CIO3 CIO4 CIO5 CIO6 CIO7 CI8 CIS0 CIS1 CIS2 TCK TIC VDD LSV VSS EM6420 S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 CBH CBL CB 47 nF VCP VDDD VDDA VDD CVCP 100 nF CVDDA 22 nF Figure 6-3 : EM6420 simplified schematic of both supply voltage configurations 6.4 STANDARD OPERATING CONDITIONS The EM6420 can be used in two different modes according to customer application requirements: Low Power Mode or Ultra Low Power Mode (see § 8.3.3). In Low Power Mode, the EM6420 device remains always in Active Mode, i.e. during the scans of the sensors and also between them. The Touch Screen interface settings are internally chosen in order to minimize the current consumption. Furthermore, the communication between the host microcontroller and the EM6420 is more efficient than in Ultra low Power Mode. The EM6420 is indeed always active and so it takes less time to reply to a received command. In Ultra Low Power Mode, the EM6420 device remains in Active Mode only during the scans of the sensors and goes in Sleep Mode between them. The Touch Screen interface settings are internally chosen in order to scan as fast as possible the sensors, thus shortening as much as possible the time the EM6420 device remains in Active Mode. Furthermore, receiving a command while in Sleep Mode may slow down the communication between the host microcontroller and the EM6420, as it has first to return in Active Mode before preparing and sending the reply. But when this mode is selected, it reduces the EM6420 power consumption with full functionality to the minimum (see typical values above). If the Touch Screen interface has to be switched off for a long time, it is strongly recommended to put the EM6420 in Disable Mode by putting the En input to VSS instead of simply sending a stopTS command (see § 8.3.2). In this case, the current consumption is reduced to a few nA, but the EM6420 loses the application parameters and the host microcontroller must send them again next time the En input is set to VDD. Copyright 2010, EM Microelectronic-Marin SA 6420-DS.doc, Version 2.0, 10-Jun-10 11 www.emmicroelectronic.com 11 Page

Páginas	Total 30 Páginas
PDF Descargar	[ Datasheet EM6420.PDF ]

Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
EM6420	Ultra Low Power Capacitive Touch Sensor Interface IC	EM Microelectronic

Número de pieza	Descripción	Fabricantes
SLA6805M	High Voltage 3 phase Motor Driver IC.	Sanken
SDC1742	12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.	Analog Devices

DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.

DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar