APDS-9003
Description
The APDS-9003 is a low cost analog-output ambient light photo sensor in miniature chipLED lead-surface mount package. It consists of a spectrally suited photo sensor, which provides excellent responsivity that is close to the response of human eyes.The APDS-9003 is ideal for applications in which the measurement of ambient light is used to control display backlighting. Mobile appliances such as the mobile phones and PDAs that draw heavy current from display backlighting will benefit from incorporating these photo sensor products in their designs by reducing power consumption significantly.
Features
• Low sensitivity variation across various light sources
• Operating temperature: -400C to 850C
• Vcc supply 2.4 to 5.5V
• ROHS compliant and Lead Free Package
Applications
• Detection of ambient light to control display backlighting
Mobile devices – Mobile phones, PDAs
Computing devices – Notebooks, Webpads
Consumer devices – TVs, Video Cameras,
Digital Still Cameras
• Automatic Residential and Commercial Lighting Management
• Electronic Signs and Signals
Relative Spectral Response vs Wavelength
Figure 1: Relative Spectral Response Vs wavelength
Typical Application Circuit
Figure 2: Typical application circuit
Operating conditions
| Parameter | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Storage/Operating Temperature | Ts/Ta | -40 | 85 | °C |
| Maximum rating Supply Voltage | Vcc | 0 | 6 | V |
| Operating Supply Voltage | Vcc | 2.4 | 5.5 | V |
Output Specifications
| Parameter | Symbol | MIn. | Typ | Max | Unit | Condition |
|---|---|---|---|---|---|---|
| Output Current | I_OUT1 | 6.3 | 19 | 31 | uA | Vcc=3V, Lux= 10(Illuminance by CIE standard light source) |
| Output Current | I_OUT2 | 90 | 230 | 370 | uA | Vcc=3V, Lux= 100(Flourescent light is used as light source) |
| Output Current | I_OUT3 | - | 276 | - | uA | Vcc=3V, Lux= 100(White LED is used as light source) |
| Dark Current | I_DARK | - | 50 | 160 | nA | Vcc=3V, Lux= 0 |
Sensitivity(Light current ratio) | I_OUT3/I_OUT2 | - | 1.2 | - | - | - |
| Rise Time | Tr | - | 0.95 | 2 | ms | Vcc=3.0V,Lux=100,Rload=1k(White LED is used as light source) |
| Fall Time | Tf | - | 0.8 | 2 | ms | Vcc=3.0V,Lux=100,Rload=1k(White LED is used as light source) |
| Supply Current | Icc | - | 2.5 | - | mA | Vcc=3.0V,Lux=100,Rload=1k(White LED is used as light source) |
| Saturated Output Voltage | Vo | 2.2 | 2.32 | - | V | Vcc=3.0V,Lux=100,Rload=1M(White LED is used as light source) |
| Peak Sensitivity Wavelength | - | 620 | - | nm | ||
| Propagation Delay time | td | - | 600 | - | us | Vcc=3.0V,Lux=100,Rload=1k(White LED is used as light source) |
| Storage Delay time | ts | - | 200 | - | us | Vcc=3.0V,Lux=100,Rload=1k(White LED is used as light source) |
So if we check the figure and the sensitivity the change in wavelength changes the sensitivity response. The change in Lux also changes the current by 1.2. Typically, the white light is used as the source which consists of 3Volts input signal with 100 illuminance. However the output depends on the load ressistor connected with the sensor.