lx1974 Microsemi Corporation, lx1974 Datasheet
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lx1974
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lx1974 Summary of contents
Page 1
... The LX1974 is a low cost silicon light sensor with spectral response that closely emulates the human eye. Patented circuitry produces peak spectral response at 520nm, with IR response less than ±5%, of the peak response, above 900nm. The photo sensor is a PIN diode array with a linear, accurate, and very repeatable current transfer function ...
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... Description Chart 1 & 2 – Step Response Graphs VDD = 4V, 200 to 20 Lux step 30.3K Load resistance Microsemi Integrated Products Division LX1974 RODUCTION ATA HEET ...
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... Chart 4 – Typical Operating Voltage Vs VSS Current 300 250 200 150 100 50 0 -40 Chart 5 – Dark Leakages Vs. Temperature - Temperature Chart 6 – Typical Temperature Response Microsemi Integrated Products Division LX1974 D S ATA HEET 10µA 100µA 200µA - Temperature (°C) - ...
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... Ambient Light Detector RODUCTION ATA HEET ≤ ≤ T 85°C except where A LX1974 Min Typ Max 520 - 1.2 1.4 1.8 2.1 2.2 2.6 7.5 10 12.5 75 100 125 150 200 250 2 @ 25°C -15 15 0.010 50 200 -25 0. LX1974 910nm 10kΩ Units μ Page 4 ...
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... W/ µ In the case of the LX1974 the peak photo response is at 520nm, however depending on the light source, what the human eye perceives as ‘white’ light may actually be composed of peak wavelengths of light other than 520nm. For instance, a typical fluorescent lamp includes dominant light not only near 550nm but also at 404 and 435nm ...
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... PWM Figure 5 – Semi-Manual Controlled Dimming Figure 6 shows how a fully manual override can be quickly added to the example in figure 5. In addition to the gate to controller. turn on and off the LX1974, a diode has been inserted to isolate the sensor when it is disabled. Disable control 3.3V The 0.25V PWM × ...
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... SHDN FB C1 4.7µF GND R7 24.9K MMBT2907 R8 60.4K C4 VDD 0.1µF 22µH VIN S/P 4.99K BRT 15K LS GND 22µF 1µF LX1994 Microsemi Integrated Products Division LX1974 Ambient Light Detector RODUCTION ATA HEET D1 UPS5817 C2 1µF R5 5.76K R4 R6 10K 15 C3 10µF R10 49.9K UPS5819 1µF 1M FDN337 ...
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... Recommended Soldering Pattern for reflow soldering of the BC (1206) package. 1.50mm 0.06in. Basic specification is < 5 seconds @ 260°C when applying Super Imposed 1206 Package solder. 4.00 2.00 Note: LX1974 parts are loaded bottom side up Microsemi Integrated Products Division LX1974 RODUCTION ATA HEET M ...
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... Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2005 Rev. 1.0, 2006-05-09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Ambient Light Detector P RODUCTION Microsemi Integrated Products Division LX1974 D S ATA HEET Page 9 ...