Light-to-Digital Converter. TSL2581 Datasheet

TSL2581 Datasheet PDF

Part Number



Light-to-Digital Converter



Total Page 30 Pages
Download TSL2581 Datasheet

General Description
TSL2580, TSL2581
Light-to-Digital Converter
The TSL2580 and TSL2581 are very-high sensitivity
light-to-digital converters that transform light intensity to a
digital signal output capable of direct I²C (TSL2581) or SMBus
(TSL2580) interface. Each device combines one broadband
photodiode (visible plus infrared) and one infrared-responding
photodiode on a single CMOS integrated circuit capable of
providing a near-photopic response over an effective 16-bit
dynamic range (16-bit resolution). Two integrating ADCs
convert the photodiode currents to a digital output that
represents the irradiance measured on each channel. This
digital output can be input to a microprocessor where
illuminance (ambient light level) in lux is derived using an
empirical formula to approximate the human eye response. The
TSL2580 device permits an SMB-Alert style interrupt, and the
TSL2581 device supports a traditional level style interrupt that
remains asserted until the firmware clears it.
While useful for general purpose light sensing applications, the
TSL2580/81 devices are designed particularly for display panels
(LCD, OLED, etc.) with the purpose of extending battery life and
providing optimum viewing in diverse lighting conditions.
Display panel backlighting, which can account for up to 30 to
40 percent of total platform power, can be automatically
managed. Both devices are also ideal for controlling keyboard
illumination based upon ambient lighting conditions.
Illuminance information can further be used to manage
exposure control in digital cameras. The TSL2580/81 devices are
ideal in notebook/tablet PCs, LCD monitors, flat-panel
televisions, cell phones, and digital cameras. In addition, other
applications include street light control, security lighting,
sunlight harvesting, machine vision, and automotive
instrumentation clusters.
Ordering Information and Content Guide appear at end of
ams Datasheet
[v1-00] 2016-Apr-05
Page 1
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TSL2580,TSL2581− GeneralDescription
Key Benefits & Features
The benefits and features of TSL2580, TSL2581, Light-to-Digital
Converter are listed below:
Figure 1:
Added Value Of Using TSL2580, TSL2581
Enables Operation in IR Light Environments Patented Dual-Diode Architecture
Enables Dark Room to High Lux Sunlight
1M:1 Dynamic Range
Digital Interface is Less Susceptible to Noise SMBus Digital Interface
Enables Low Standby Power Consumption 3μA Quiescent Current
Reduces Board Space Requirements while
Simplifying Designs
Available in 1.25mm x 1.75mm Chipscale or 2mm x 2mm
Dual Flat No-Lead (FN) Packages
Approximately 30x More Sensitive Than the TSL2560/61
Approximates Human Eye Response
Programmable ALS Interrupt Function with User-Defined
Upper and Lower Threshold Settings
16-Bit Digital Output with SMBus (TSL2580) at 100 kHz or
I²C (TSL2581) Fast-Mode at 400 kHz
Programmable Analog Gain and Integration Time
Supporting 1,000,000-to-1 Dynamic Range
Automatically Rejects 50/60-Hz Lighting Ripple
TSL2580, TSL2581, Light-to-Digital Converter is ideal for:
Ambient Light Sensor (ALS) for Smart Phones, Digital
Photo Frames, and Portable Navigation Systems
ALS for LED Signs, Laptop Computers, and LCD TVs
Page 2
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ams Datasheet
[v1-00] 2016-Apr-05

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