tsl2550 ETC-unknow, tsl2550 Datasheet
tsl2550
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tsl2550 Summary of contents
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... D Low-Profile Surface-Mount Package Description The TSL2550 is a digital light sensor with a two-wire, SMBus serial interface. It combines two photodiodes and a companding analog-to-digital converter (ADC single CMOS integrated circuit to provide light measurements over an effective 12-bit dynamic range. The TSL2550 is designed for use with broad wavelength light sources. One of the photodiodes (Channel 0) is sensitive to visible and infrared light, while the second photodiode (Channel 1) is sensitive primarily to infrared light ...
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... www.taosinc.com ORDERING NUMBER TSL2550D 6 V –0 – – – 2000 V ...
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Electrical Characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER V V SMBus output low voltage SMBus output low voltage Supply current Supply current DD I High level input current IH I Low level input ...
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TAOS029 – SEPTEMBER 2002 AC Electrical Characteristics, V PARAMETER t Conversion time, per channel (CONV) f Clock frequency (SMBCLK) t Bus free time between start and stop condition (BUF) Hold time after (repeated) start condition. After t (HDSTA) this period, ...
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... Figure 1. SMBus Timing Diagrams R ACK by TSL2550 R ACK by TSL2550 Frame 2 Data Byte From TSL2550 t www.taosinc.com TAOS029 – SEPTEMBER 2002 t (SUSTO Stop ACK t (LOWMEXT ACK by TSL2550 Frame 2 Command Byte ...
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TAOS029 – SEPTEMBER 2002 SPECTRAL RESPONSIVITY 1 0.8 Channel 0 Photodiode 0.6 0.4 Channel 1 Photodiode 0.2 0 400 500 600 700 800 – Wavelength – nm Figure 4 Copyright E 2002, TAOS Inc. 6 TYPICAL CHARACTERISTICS 1.8 1.6 1.4 ...
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... ADC channels. The SMBus slave address is hardwired internally as 0111001 (MSB to LSB A0). Both the send byte protocol and the receive byte protocol are implemented in the TSL2550. The send byte protocol allows single bytes of data to be written to the device (see Figure 6). The written byte is called the COMMAND byte ...
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... Table 1. Command Register Data Format RESERVED RSEL0 0 0 DESCRIPTION Read Data Select. This field determines the data output by the TSL2550 during read. Field Value Read Value 000 Command register 010 ADC channel 0 100 ADC channel 1 Reserved for factory test. These bits should always be written to 0. ...
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... ADC Register The TSL2550 contains two ADC registers (channel 0 and channel 1). Each ADC register contains two components to determine the logarithmic ADC count value: CHORD bits and STEP bits. The CHORD bits correspond to the most significant portion of the ADC value and specifies a segment of the piece-wise linear approximation ...
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TAOS029 – SEPTEMBER 2002 Table 4. CHORD and STEP Numbers and Values vs Register Bits CHORD C, CHORD BITS NUMBER B6, B5, B4 000 0 001 1 010 2 011 3 100 4 101 5 110 6 111 7 NOTES: ...
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Operation After applying VDD, the device will initially be in the power down state. To operate the device, issue an SMBus Send Byte protocol with the device address and the appropriate command byte to read ADC channel 0 or ADC ...
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... This problem is overcome in the TSL2550 through the use of two photodiodes. One of the photodiodes (Channel 0) is sensitive to both visible and infrared light, while the second photodiode (Channel 1) is sensitive primarily to infrared light ...
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PACKAGE D 5 4 0. 1.27 + 0.10 1.8 + 0.200 y 8 0.65 + 0.12 NOTES: A. All linear dimensions are in millimeters. ...
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TAOS029 – SEPTEMBER 2002 PRODUCTION DATA — information in this document is current at publication date. Products conform to specifications in accordance with the terms of Texas Advanced Optoelectronic Solutions, Inc. standard warranty. Production processing does not necessarily include testing ...