Product Overview
The TCS3772 device family offers integrated red, green, blue, and clear (RGBC) light sensing capabilities, along with proximity detection when paired with an external IR LED. It excels at measuring light intensity across diverse lighting conditions and through various attenuation materials, including dark glass. The proximity feature provides a wide dynamic range for accurate short-distance detection, such as in mobile phones for ear proximity. An internal state machine enables low-power states between measurements, minimizing average power consumption. The color sensing functionality is valuable for applications like LED RGB backlight control, solid-state lighting, reflected LED color sampling, and fluorescent light color temperature detection. With an integrated IR blocking filter, it also serves as an effective ambient light sensor, color temperature monitor, and general-purpose color sensor.
Product Attributes
- Brand: ams
Technical Specifications
| Parameter | Conditions | Min | Typ | Max | Units | Notes |
|---|---|---|---|---|---|---|
| Electrical Characteristics | ||||||
| Supply voltage, VDD | TCS37725 (IC VBUS = VDD) | 2.7 | 3 | 3.6 | V | |
| Supply voltage, VDD | TCS37727 (IC VBUS = 1.8 V) | 2.7 | 3 | 3.3 | V | |
| Operating free-air temperature | -30 | 70 | C | |||
| Supply current | Active LDR pulses off | 235 | 330 | A | ||
| Supply current | Wait state | 65 | A | |||
| Supply current | Sleep state - no IC activity | 2.5 | 10 | A | ||
| SDA, SCL, INT pins leakage current | -5 | 5 | A | |||
| LDR pin leakage current | -5 | 5 | A | |||
| SCL/SDA input high voltage | TCS37725 | 0.7 VDD | V | |||
| SCL/SDA input high voltage | TCS37727 | 1.25 | V | |||
| SCL/SDA input low voltage | TCS37725 | 0.3 VDD | V | |||
| SCL/SDA input low voltage | TCS37727 | 0.54 | V | |||
| INT output low voltage | 3 mA sink current | 0 | 0.4 | V | ||
| INT output low voltage | 6 mA sink current | 0 | 0.6 | V | ||
| Optical Characteristics | ||||||
| Red Channel Irradiance responsivity | D= 465 nm | 0% | 15% | (1) | ||
| Green Channel Irradiance responsivity | D= 465 nm | 10% | 42% | (1) | ||
| Blue Channel Irradiance responsivity | D= 465 nm | 65% | 88% | (1) | ||
| Clear Channel Irradiance responsivity | D= 465 nm | 11.0 | 13.8 | 16.6 | counts /W /cm | (1, 2) |
| Red Channel Irradiance responsivity | D= 525 nm | 4% | 25% | (1) | ||
| Green Channel Irradiance responsivity | D= 525 nm | 60% | 85% | (1) | ||
| Blue Channel Irradiance responsivity | D= 525 nm | 10% | 45% | (1) | ||
| Clear Channel Irradiance responsivity | D= 525 nm | 13.2 | 16.6 | 20.0 | counts /W /cm | (1, 3) |
| Red Channel Irradiance responsivity | D= 615 nm | 80% | 110% | (1) | ||
| Green Channel Irradiance responsivity | D= 615 nm | 0% | 14% | (1) | ||
| Blue Channel Irradiance responsivity | D= 615 nm | 5% | 24% | (1) | ||
| Clear Channel Irradiance responsivity | D= 615 nm | 15.6 | 19.5 | 23.4 | counts /W /cm | (1, 4) |
| Dark ADC count value | Ee = 0, AGAIN = 60, ATIME = 0xD6 (100 ms) | 0 | 1 | 5 | counts | (1) |
| ADC integration time step size | ATIME=0xFF | 2.27 | 2.4 | 2.56 | ms | |
| ADC number of integration steps | 1 | 256 | steps | (1) | ||
| ADC counts per step | 0 | 1024 | counts | (1) | ||
| ADC count value | ATIME=0xC0 (153.6 ms) | 0 | 65535 | counts | (1) | |
| Gain scaling, relative to 1 gain setting | 4 | 3.8 | 4 | 4.2 | ||
| Gain scaling, relative to 1 gain setting | 16 | 15 | 16 | 16.8 | ||
| Gain scaling, relative to 1 gain setting | 60 | 58 | 60 | 63 | ||
| Proximity Characteristics | ||||||
| Supply current | LDR pulse on | 3 | mA | |||
| ADC conversion time step size | PTIME = 0xFF | 2.27 | 2.4 | 2.56 | ms | |
| ADC number of integration steps | 1 | 256 | steps | (1) | ||
| ADC counts per step | PTIME = 0xFF | 0 | 1023 | counts | (1) | |
| ADC count value | p = 850 nm, Ee = 770.1 W/cm, PTIME = 0xFB, PPULSE= 1 | 1350 | 1900 | counts | (1, 3) | |
| ADC output responsivity | p = 850 nm, PTIME = 0xFF, PPULSE = 1 | 0.175 | 0.211 | 0.247 | counts/ W/ cm | (1, 3) |
| Proximity noise | Ee = 0, PTIME = 0xFF, PPULSE = 8 | 2 | % FS | (1, 2, 3) | ||
| LED pulse count | 0 | 255 | pulses | |||
| LED pulse period | 14.0 | s | ||||
| LED pulse width | 6.3 | s | ||||
| LED drive current | ISINK sink current @ 1.6 V, LDR pin, PDRIVE = 0 | 80 | 106 | 132 | mA | |
| LED drive current | ISINK sink current @ 1.6 V, LDR pin, PDRIVE = 1 | 50 | mA | |||
| LED drive current | ISINK sink current @ 1.6 V, LDR pin, PDRIVE = 2 | 25 | mA | |||
| LED drive current | ISINK sink current @ 1.6 V, LDR pin, PDRIVE = 3 | 12.5 | mA | |||
| Maximum operating distance | PDRIVE = 0 (100 mA), PPULSE = 64, Emitter: p = 850 nm, 20 half angle, 60 mW/sr; Object: 16 20-inch, 90% reflective Kodak Gray Card; Optics: Open view | 30 | inches | (1, 4, 5) | ||
| Wait Characteristics | ||||||
| Wait step size | WTIME = 0xFF | 2.27 | 2.4 | 2.56 | ms | |
| Wait number of steps | 1 | 256 | steps | (1) | ||
2411271924_AMS-TCS37727FN_C2654930.pdf
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