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TCS34087数据手册(TCS3408_datasheet_2-00).pdf

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    Product Document Published by ams OSRAM Group
    General Description TCS3408 ALS/Color Sensor with Selective Flicker Detection The TCS3408 features ambient light and color (RGB) sensing, as well as flicker detection which suppresses cross-coupling from 940nm IR, if generated by adjacent circuits (e.g. TOF). The device comes in a low-profile and small footprint, L2.5mm x W2.0mm x H0.5mm package. The Ambient Light and Color Sensing function provides five concurrent ambient light sensing channels: Red, Green, Blue, Clear, and Wideband. The RGB and Clear channels have a UV/IR blocking filter. This architecture accurately measures ambient light and enables the calculation of illuminance, chromaticity, and color temperature to manage display appearance. The device integrates direct detection of 50Hz or 60Hz ambient light flicker. Flicker detection is executed in parallel with ambient light and color sensing and has independent gain configuration. The flicker detection engine can also buffer data for calculating other flicker frequencies externally. Ordering Information and Content Guide appear at end of datasheet. ams Datasheet [v1-01] 2021-Jul-28 Page 1 Document Feedback
    TCS3408 − General Description Key Benefits & Features The benefits and features of TCS3408 are listed below: Figure 1: Added Value of Using TCS3408 Benefits Features • Invisible ALS and color sensing under any glass type • Configurable, high sensitivity • Programmable gain and integration time • 2048x dynamic range by gain adjustment only • 1mlux minimum detectable illuminance (100ms) • Tailored ALS and color response • UV/IR blocking filter for RGBC channels • Wideband reference channel without filters • ALS/color interrupt with thresholds • Unique fast ALS integration mode • Flicker-immune ALS sensing within 10ms • Integrated ambient light flicker detection on chip • Low power consumption and minimum I²C traffic • Independently configurable timing and gain • Automatic gain adjustment • 50Hz and 60Hz flicker detection flags • Flicker detected interrupt • 1.8VDD operation • Configurable sleep mode • Interrupt-driven device • On-chip self-calibration of ALS • Integrated status checking for all functions • Digital and analog ALS saturation flags Applications TCS3408 integrates multiple applications within one device. The applications for TCS3408 include: • Brightness management for displays • Color management for displays • Camera image processing • Flicker-immune camera operation Page 2 Document Feedback ams Datasheet [v1-01] 2021-Jul-28
    TCS3408 − General Description Figure 2: Functional Blocks of TCS3408 Block Diagram The functional blocks of this device are shown below: C R G B W F1 F2 l r e x e p i t l u M ALS Engine Clear (C) Color (RGB) Wideband (W) Flicker (F1, F2) VDD PGND VSS TCS3408 A D CA D CA D CA D CA A D D C C s 6 A L S Registers + - + Limit INPUT - Limit Interrupt Flags Digital Core OSCILLATOR I2C SCL SDA INT ams Datasheet [v1-01] 2021-Jul-28 Page 3 Document Feedback
    Pin Assignments Device pinout is described below. TCS3408 − Pin Assignments Figure 3: Pin Diagram of TCS3408 C / I C / I Figure 4: Pin Description of TCS3408 Pin Number Pin Name Description 1 2 3 4 5 6 7 8 9 10 11 12 VSS SCL SDA VDD I/C INT NC NC NC NC Ground. All voltages are referenced to VSS/PGND, and both ground pins must be connected to ground. I²C serial clock terminal I²C serial data I/O terminal Supply voltage (1.8V) Internal connection. Connect to ground. Interrupt. Open-drain output plus supports additional output options. No connect No connect No connect No connect PGND Ground. All voltages are referenced to VSS/PGND, and both ground pins must be connected to ground. I/C Internal connection. Connect to ground. Note(s): 1. NC pins do not have an internal electrical connection. For device. ESD protection, it is recommended to connect it to ground. Page 4 Document Feedback ams Datasheet [v1-01] 2021-Jul-28
    TCS3408 − Absolute Maximum Ratings Absolute Maximum Ratings Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. All voltages with respect to VSS/PGND. Device parameters are guaranteed at VDD = 1.8 V and TA = 25°C unless otherwise noted. Figure 5: Absolute Maximum Ratings Symbol Parameter Min Max Units Comments Electrical Parameters VDD VIO IIO Supply voltage Digital I/O terminal voltage Output terminal current -0.3 -0.3 -1 2.2 3.6 20 Electrostatic Discharge ESDHBM Electrostatic discharge HBM ±2000 V mA V Temperature Ranges and Storage Conditions TSTRG TA Storage temperature range Operating temperature range -40 -30 85 85 °C Figure 6: Recommended Operating Conditions JEDEC/ESDA JS-001-2014 Symbol Parameter Min Typ Max Units Comments Electrical Parameters VDD VLDR TA Supply voltage 1.7 External LED anode supply 2.0 1.8 3.3 Temperature Ranges and Storage Conditions Operating free-air temperature (1) -30 25 70 V V °C Note(s): 1. While the device is operational across the temperature range, functionality will vary with temperature. ams Datasheet [v1-01] 2021-Jul-28 Page 5 Document Feedback
    Optical Characteristics TCS3408 − Optical Characteristics All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. Device parameters are guaranteed with VDD = 1.8 V and TA = 25°C unless otherwise noted. Figure 7: ALS/Color Characteristics of TCS3408, ALS Gain = 128x, Integration Time = 11ms (unless otherwise noted) Parameter Conditions Min Typ Max Unit Dark ADC count value (1) Ee = 0μW/cm2 ALS gain: 512x Integration time: 98ms 0 0 3 counts ALS gain ratios (2) 0.5x 1x 2x 4x 8x 16x 32x 64x 256x 512x 1024x 2048x Clear channel irradiance responsivity Wideband channel irradiance responsivity White LED, 2700K (3) 56.4 Lux accuracy (4) ADC noise (5) White LED, 2700K (3) 90 White LED, 2700K (3) Integration time: 100ms 1/256 1/128 1/64 1/32 1/16 1/8 1/4 1/2 2.05 4.33 8.38 17.3 66.3 23.4 100 0.05 76.2 counts/ (μW/cm2) 110 % Page 6 Document Feedback ams Datasheet [v1-01] 2021-Jul-28
    TCS3408 − Optical Characteristics Parameter Conditions Min Typ Max Unit Red/Clear channel ratios Green/Clear channel ratios Blue/Clear channel ratios White LED, 2700K Blue LED, λD = 465nm(6) Red LED, λD = 615nm(7) White LED, 2700K Green LED, λD = 525nm(8) Red LED, λD = 615nm White LED, 2700K Blue LED, λD = 465nm Red LED, λD = 615nm Wideband/Clear channel ratio White LED, 2700K Wideband/Flicker_1 channel ratio White LED, 2700K 52 0 81 21 63 0 1 73 0 26 18 72 20 111 42 86 20 30 100 20 44 25 % % Note(s): 1. The typical 3-sigma distribution shows less than 1 count for an ATIME setting of less than 98ms. 2. The gain ratios are calculated relative to the response with integration time = 27.8ms and ALS gain = 128x. 3. The White LED is an InGaN light-emitting diode with integrated phosphor and the following characteristic: correlated color temperature = 2700K. 4. Lux accuracy is an illuminance estimated using the red, green, blue, and clear channels and is not 100% production tested. 5. ADC noise is calculated as the standard deviation relative to full scale. 6. The Blue LED is an InGaN light-emitting diode with the following characteristics: dominant wavelength λD = 465nm, spectral halfwidth Δλ½ = 22nm. 7. The Red LED is an AlInGaP light-emitting diode with the following characteristics: dominant wavelength λD = 615nm, spectral halfwidth Δλ½ = 15nm. 8. The Green LED is an InGaN light-emitting diode with the following characteristics: dominant wavelength λD = 525nm, spectral halfwidth Δλ½ = 35nm. ams Datasheet [v1-01] 2021-Jul-28 Page 7 Document Feedback
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