ISL76671 Low Power, <100 Lux Optimized, Analog Output Ambient Light Sensor
The ISL76671 is a low-cost, light-to-voltage silicon optical sensor designed for ambient light sensing applications. It features a photodiode array with peak sensitivity at 550nm, closely mimicking the human eye's spectral response and rejecting UV and IR light. The integrated non-linear current amplifier converts the photodiode signal into a square root output format, extending dynamic range and maintaining sensitivity in low-light conditions (0.01 lux to 100 lux). A dark current compensation circuit minimizes temperature-dependent leakage, enhancing low-lux sensitivity. The device includes a micro-power op amp capable of driving an ADC directly. Its low power consumption and compact ODFN package make it suitable for various applications, especially when mounted behind smoked bezels or mirrors.
Product Attributes
- Brand: Intersil (implied by ISL76671)
- Material: Pb-free plastic (RoHS compliant)
- Certifications: AEC-Q100 Qualified (Grade 2)
Technical Specifications
| Parameter | Description | Min | Typ | Max | Units | Conditions |
|---|---|---|---|---|---|---|
| Input Light Intensity Range | Range for Square Root Relationship | 0.01 | - | 100 | Lux | - |
| Supply Voltage | VDD Operating Supply Voltage | 1.8 | 3 | - | V | - |
| Supply Current | IDD | - | 0.7 | 2 | A | E = 0 lux, -40C to +60C |
| Supply Current | IDD | - | - | 5 | A | E = 0 lux, -40C to +105C |
| Supply Current | IDD | - | 23 | 35 | A | E = 100 lux |
| Light-to-Voltage Accuracy | VOUT | - | 0.65 | - | V | E = 10 lux |
| Light-to-Voltage Accuracy | VOUT | - | 1.35 | - | V | E = 50 lux |
| Light-to-Voltage Accuracy | VOUT | - | 1.4 | 2.3 | V | E = 100 lux |
| Voltage Output in Absence of Light | VDARK | - | 0.95 | 20 | mV | E = 0 lux, -40C to +60C |
| Voltage Output in Absence of Light | VDARK | - | - | 120 | mV | E = 0 lux, -40C to +105C |
| Output Voltage Variation | VOUT over Fluorescent, Incandescent, Halogen | - | - | 10 | % | - |
| Power Supply Rejection Ratio | PSRR | - | 0.12 | - | mV/V | E = 100 lux |
| Maximum Output Compliance Voltage | VO-CMPL (95% of Nominal) | - | VDD - 0.7 | - | V | - |
| Maximum Output Voltage Swing | VO-MAX | - | VDD | - | V | - |
| Rise Time | tR (0 lux to 100 lux) | - | - | 95 | s | - |
| Fall Time | tF (100 lux to 0 lux) | - | - | 155 | s | - |
| Delay Time (Rising Edge) | tD (0 lux to 100 lux) | - | - | 350 | s | - |
| Delay Time (Falling Edge) | tS (100 lux to 0 lux) | - | - | 250 | s | - |
| Op Amp Short Circuit Current | ISC | - | 12 | - | mA | - |
| Op Amp Slew Rate | SR | - | 13 | - | V/ms | - |
| Op Amp Offset Voltage | VOS | - | 0.9 | - | mV | - |
| Operating Temperature | TA | -40 | - | +105 | C | - |
| Package Type | - | - | - | - | 6 Ld ODFN | 2mmx2.1mmx0.7mm |
| Spectral Response | Peak Sensitivity | - | 550 | - | nm | - |
| Spectral Response Range | - | 400 | - | 600 | nm | - |
| External Resistor | REXT (Recommended) | - | 100 | - | k | - |
Applications
- Display backlight control (central info display and instrumentation)
- Anti-glare mirror systems
2304140030_RENESAS-ISL76671AROZ-T7_C2153586.pdf
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