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ISL29044IROMZ-T7 датащи(PDF) 1 Page - Intersil Corporation |
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ISL29044IROMZ-T7 датащи(HTML) 1 Page - Intersil Corporation |
1 / 19 page 1 Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital Output ISL29044 The ISL29044 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 microcontroller utilization. For ambient light sensor (ALS) data conversions, an ADC converts photodiode current (with a light sensitivity range up to 2000 Lux) 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 ISL29044 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 ISL29044 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 ISL29044 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 FIGURE 2. PROXIMITY RESPONSE vs DISTANCE LED- 5 IRDR 6 LED+ 4 VDD 1 INT 7 SDA 8 GND 3 SCL 2 I2C SLAVE 0 ISL29044 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 0 10 20 30 40 50 60 70 80 90 100 0 20 40 60 80 100 120 140 160 DISTANCE (mm) 220mA WHITE 110mA WHITE 110mA GREY 220mA GREY October 30, 2012 FN8305.0 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2012. 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. NOT R ECOMM ENDED FOR N EW DE SIGNS RECOM MENDE D REP LACEM ENT PA RT ISL290 44A |
Аналогичный номер детали - ISL29044IROMZ-T7 |
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Аналогичное описание - ISL29044IROMZ-T7 |
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