IS31SE5001 IR SENSOR FOR PROXIMITY DETECTION DESCRIPTION PROCEDURE The IS31SE5001 is a low-power, reflectance-based infrared light sensor with advanced signal processing and digital output. The sensor can detect nearby objects, making touchless proximity possible. The IS31SE5001 evaluation board is fully assembled and tested. Follow the steps listed below to verify board operation. The IS31SE5001 uses one infrared LED and an internal photodiode which picks up the reflectance signal to perform proximity detection. When an object approaches, a flag bit in the IS31SE5001 status register will be set and an interrupt signal is generated to inform the master to read the flag bit through I2C interface. Caution: Do not turn on the power supply until all connections are completed. 1) Connect the ground terminal of the power supply to the GND and the positive terminal to the VCC. Or connect the DC power to the connector (DC IN). 2) Turn on the power supply and pay attention to the supply current. If the current exceeds 600mA, please check for circuit fault. FEATURES Supply voltage from 2.7V~5.5V 400kHz I2C compatible interface 1µA shutdown current 0.6mA low supply current Detection range can be adjusted Integrated signal processing and digital output Auto interrupt clear Package in QFN-8(2mm × 2mm) QUICK START EVALUATION BOARD OPERATION The evaluation board is controlled by an LPC922. The IS31SE5001 evaluation board supports four Proximity Modes which can be selected by K1 button switch. The evaluation board’s D1 LED will turn off when an object is detected and directly above the IRLED and photo diode within the detect distance. 1) Mode 1(Default): Proximity Mode (The emitting current is 400mA and detect distance is 15cm). 2) Mode 2：Proximity Mode (The emitting current is 280mA and detect distance is 14cm). 3) Mode 3：Proximity Mode (The emitting current is 210mA and detect distance is 12cm). 4) Mode 4：Proximity Mode (The emitting current is 70mA and detect distance is 9cm). SOFTWARE SUPPORT Please refer to the integrated program. Figure 1: Photo of IS31SE5001 Evaluation Board RECOMMENDED EQUIPMENT The jumper JP1 is closed default. If you want to use external MCU to control IS31SE5001, the JP1 should be open, MCU on the board will stop working and the I2C ports will be high resistance. Connect the external MCU to the I2C connector TP3 to control the IC. Please refer to the datasheet to get more information about IS31SE5001. 5.0V, 2A power supply ABSOLUTE MAXIMUM RATINGS ≤ 5.5V power supply Caution: Do not exceed the conditions listed above, otherwise the board will be damaged. Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/11/2013 1 IS31SE5001 IR SENSOR FOR PROXIMITY DETECTION ORDERING INFORMATION Part No. Temperature Range Package IS31SE5001-QFLS2-EB -40°C ~ +85°C (Industrial) QFN-8, Lead-free Table1: Ordering Information For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing team at [email protected] or (408) 969-6600. 3V Optional (Note 1) C3 0R R7 0R 7 3 2 1 C6 LDO C2 1uF SDA 1 2 3 RST 4 5 3V K1 R5 20K 6 7 INTB 8 9 10 P0.0 P0.1 P1.7 P0.2 P1.6 P0.3 RST P0.4 GND P0.5 OSC1 OSC2 VDD P0.6 INT1/P1.4 T1/P0.7 INT0/P1.3 T0/P1.2 TXD/P1.0 RXD/P1.1 20 SDA 3V P0.5 P0.4 RST GND 19 SCL 18 3V IRLED SD 17 P0.4 5 4 TP4 INTB 3 5 4 3 2 1 SD 2 SDA RX 6 D5 INTB SDB GND 1 IS31SE5001 ICP 16 P0.5 3V VCC CON1 C5 3V LED TP3 TP1 C1 100uF 0.1uF 13 12 11 D2 8 SCL 15 14 D3 R4 R1 R3 R2 4.7K 4.7K 4.7K 4.7K SCL U2 D4 VCC 0.1uF VCC JP1 OPEN=EXT CTRL U1 EN GND R8 0.01uF BP U3 Vdd Vout 5 1uF 4 VCC C4 DC IN TP2 GND INT SDA SCL SD 1 2 3 4 5 1K R6 D1 LPC922 Figure 2: IS31SE5001 Application Schematic Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/11/2013 2 IS31SE5001 IR SENSOR FOR PROXIMITY DETECTION BILL OF MATERIALS Name Symbol Sensor IC U1 MCU Description Qty Supplier Part No. IR sensor for proximity detection 1 ISSI IS31SE5001 U2 Microcontroller 1 NXP LPC922 LDO U3 Low-dropout regulator 1 PAM PAM3101 LED Blue D1 Diode, LED Blue, SMD 1 Everlight Resistors R1~R4 RES,4.7k,1/10W,±5%,SMD 4 Resistor R5 RES,20k,1/10W,±5%,SMD 1 Resistor R6 RES,1k,1/10W,±5%,SMD 1 Resistors R7,R8 RES,0R,1/10W,±5%,SMD 2 Capacitor C1 CAP,100µF,10V,±20%,SMD 1 Capacitors C2,C4 CAP,1µF,16V,±20%,SMD 2 Capacitor C3 CAP,0.01F,16V,±10%,SMD 1 Capacitors C5,C6 CAP,0.1µF,16V,±20%,SMD 2 IRLED D4 IRLED 1 IRLED D3,D2 Not connect (Note 1) 2 PD D5 Not connect 1 Everlight IR26-21C/L110/CT Note 1: There is only one IRLED can be put in D4, D3 or D2 locations. Three locations make more choice for customers to select distance between IRLED and sensor IC. Bill of Materials, refer to Figure 2 above. Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/11/2013 3 IS31SE5001 IR SENSOR FOR PROXIMITY DETECTION Figure 3: Board Component Placement Guide -Top Layer Figure 4: Board PCB Layout- Top Layer Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/11/2013 4 IS31SE5001 IR SENSOR FOR PROXIMITY DETECTION Figure 5: Board Component Placement Guide -Bottom Layer Figure 6: Board PCB Layout-Bottom Layer Copyright © 2013 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device specification before relying on any published information and before placing orders for products. Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that: a.) the risk of injury or damage has been minimized; b.) the user assume all such risks; and c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 07/11/2013 5