Page 8

Datasheet, Public

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[v2-00] 2022-Nov-30

TSL2572 − Electrical Characteristics

Figure 8:

ALS Characteristics; VDD = 3V, TA = 25°C, AGAIN = 16x; AEN = 1 (unless otherwise noted)

(1) (2) (3)

Note(s):

1. Optical measurements are made using small-angle incident radiation from light-emitting diode optical sources. Visible white LEDs

and infrared 850 nm LEDs are used for final product testing for compatibility with high-volume production.

2. The white LED irradiance is supplied by a white light-emitting diode with a nominal color temperature of 4000 K.

3. The 850 nm irradiance Ee is supplied by a GaAs light-emitting diode with the following typical characteristics: peak wavelength

λp = 850 nm and spectral halfwidth Δλ½ = 42 nm.

4. Parameter ensured by design and is not tested.

Parameter

Test Conditions

Channel

Min

Typ

Max

Unit

Dark ADC count value

Ee = 0, AGAIN = 120x

ATIME = 0xDB (100 ms)

CH0

0

1

5

counts

CH1

0

1

5

ADC integration time

step size

ATIME = 0xFF

2.58

2.73

2.9

ms

ADC Number of

integration steps (4)

1

256

steps

ADC counts per step (4)

ATIME = 0xFF

0

1024

counts

ADC count value (4)

ATIME = 0xC0

0

65535

counts

ADC count value

White light, Ee = 263.9

μW/cm2

ATIME = 0xF6 (27 ms) (2)

CH0

4000

5000

6000

counts

CH1

680

λp = 850 nm, Ee = 263.4

μW/cm2

ATIME = 0xF6 (27 ms) (3)

CH0

4000

5000

6000

CH1

2850

ADC count value ratio:

CH1/CH0

White light, ATIME 0xF6 (27 ms) (2)

0.086

0.136

0.186

λp = 850 nm ATIME 0xF6 (27 ms) (3)

0.456

0.570

0.684

Re

Irradiance responsivity

White light, ATIME = 0xF6

(27 ms) (2)

CH0

18.9

counts/

(

μW/

cm2)

CH1

2.58

λp = 850 nm, ATIME = 0xF6

(27 ms) (3)

CH0

19.0

CH1

10.8

Gain scaling, relative

to 1x gain setting

AGAIN = 1x and AGL = 1

0.128

0.16

0.192

x

AGAIN = 8x and AGL = 0

7.2

8.0

8.8

AGAIN = 16x and AGL = 0

14.4

16.0

17.6

AGAIN = 120x and AGL = 0

108

120

132