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ISL29030A Datasheet(PDF) 11 Page - Intersil Corporation |
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ISL29030A Datasheet(HTML) 11 Page - Intersil Corporation |
11 / 16 page ISL29030A 11 FN7722.0 November 18, 2010 back from within. As a result, the proximity count peaks at contact and monotonically decreases as skin moves away. The reflective characteristics of skin are very different from that of paper. Typical Circuit A typical application for the ISL29030A is shown in Figure 5. The ISL29030A’s I2C address is internally hardwired as 0b1000100. The device can be tied onto a system’s I2C bus together with other I2C compliant devices. Soldering Considerations Convection heating is recommended for reflow soldering; direct-infrared heating is not recommended. The plastic ODFN package does not require a custom reflow soldering profile, and is qualified to +260°C. A standard reflow soldering profile with a +260°C maximum is recommended. (http://www.intersil.com/data/tb/TB477.pdf) Suggested PCB Footprint It is important that users check the “Surface Mount Assembly Guidelines for Optical Dual FlatPack No Lead (ODFN) Package” before starting ODFN product board mounting. (http://www.intersil.com/data/tb/TB477.pdf) Layout Considerations The ISL29030A is relatively insensitive to layout. Like other I2C devices, it is intended to provide excellent performance even in significantly noisy environments. There are only a few considerations that will ensure best performance. Route the supply and I2C traces as far as possible from all sources of noise. A 0.1µF and 1µF power supply decoupling capacitors need to be placed close to the device. IALS 1 GND 3 REXT 4 SDA INT 7 IRDR 8 ISL29030A R1 10kΩ R2 10kΩ REXT 499kΩ VDD MICROCONTROLLER INT SDA SLAVE_0 SLAVE_1 I2C SLAVE_n I2C MASTER SCL SDA SCL SDA VI2C_PULL-UP 6 R3 10kΩ SCL 2 VDD 5 C2 0.1µF FIGURE 5. ISL29030A TYPICAL CIRCUIT SCL C1 1µF VIR-LED V 3.5kΩ |
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