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ISL29044A Folha de dados(PDF) 1 Page - Intersil Corporation |
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ISL29044A Folha de dados(HTML) 1 Page - Intersil Corporation |
1 / 2 page 1 Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital Output ISL29044A The ISL29044A is an integrated ambient and infrared light-to-digital converter with a built-in IR LED and I2C Interface (SMBus Compatible). This device uses two independent ADCs for concurrently measuring ambient light and proximity in parallel. The flexible interrupt scheme is designed for minimal micro-controller utilization. For ambient light sensor (ALS) data conversions, an ADC converts photodiode current (with a light sensitivity range up to 3200Lux) in 100ms per sample. The ADC rejects 50Hz/60Hz flicker noise caused by artificial light sources. For proximity sensor (Prox) data conversions, the built-in driver turns on an internal infrared LED and the proximity sensor ADC converts the reflected IR intensity to digital. This ADC rejects ambient IR noise (such as sunlight) and has a 547μs conversion time. The ISL29044A provides low power operation of ALS and proximity sensing with a typical 133μA normal operation current (108μA for sensors and internal circuitry, ~25μA for LED) with 220mA current pulses for a net 100μs, repeating every 800ms (or under). The ISL29044A uses both a hardware pin and software bits to indicate an interrupt event has occurred. An ALS interrupt is defined as a measurement that is outside a set window. A proximity interrupt is defined as a measurement over a threshold limit. The user may also require that both ALS/Prox interrupts occur at once, up to 16 times in a row before activating the interrupt pin. The ISL29044A is designed to operate from 2.25V to 3.63V over the -40°C to +85°C ambient temperature range. It is packaged in a clear, lead-free 8 Ld ODFN package. Features • Internal LED + Sensor = complete solution • Works under all light sources including sunlight • Dual ADCs measure ALS/Prox concurrently •<1.0μA Supply current when powered down • Temperature compensated • Pb-Free (RoHS compliant) Intelligent and Flexible Interrupts • Independent ALS/Prox interrupt thresholds • Adjustable interrupt persistency - 1/4/8/16 consecutive triggers required before interrupt Applications • Display and keypad dimming adjustment and proximity sensing for: - Mobile devices: Smart phone, PDA, GPS - Computing devices: Laptop PC, Netbook, Tablet PC - Consumer devices: LCD-TV, digital picture frame, digital camera - Industrial and medical light and proximity sensing Related Literature • See AN1436, “Proximity Sensors” FIGURE 1. TYPICAL APPLICATION LED- 5 IRDR 6 LED+ 4 VDD 1 INT 7 SDA 8 GND 3 SCL 2 I2C SLAVE 0 ISL29044A SCL SDA I2C SLAVE 1 I2C-DIAGRAM SCL SDA I2C SLAVE_n I2C-DIAGRAM INT SCL SDA I2C MASTER CONTROLLER R1 RES1 R2 RES1 R3 RES1 C1 0.1µF C2 1µF C3 0.1µF V_LED V_PULLUP VDD April 19, 2013 FN8419.1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas LLC 2013. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. |
Nº de peça semelhante - ISL29044A |
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Descrição semelhante - ISL29044A |
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