ams Datasheet

Page 7

[v1-08] 2017-Aug-28

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TSL2584TSV − Electrical Characteristics

Figure 8:

ALS Characteristics, VDD=3V, TA=25ºC, GAIN=16x, AEN=1(unless otherwise noted)

(1)

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. The integration time Tint, is dependent on the internal oscillator frequency (fOSC) and on the number of integration cycles (ATIME)

in the Timing Register as described in the register section. For nominal fOSC = 750 kHz, nominal Tint = 2.7 ms x ATIME.

5. 111x gain is affected by the line inductance between the VDD pin and the decoupling capacitor.

Parameter

Conditions

Channel

Min

Typ

Max

Units

Dark ADC count

value

Ee = 0, GAIN = 111x,

ATIME=0xB6 (200ms)

CH0

CH1

0

0

1

1

3

3

counts

ADC integration

time step size

ATIME = 0xFF

2.58

2.73

2.90

ms

ADC integration

time steps (4)

1

256

steps

Full scale ADC

count value

ATIME = 0xDB (100ms)

ATIME = 0x6C (400ms)

37887

65535

counts

ADC count value

White light

Ee = 218 μW/cm

2

ATIME = 0xF6 (27ms) (2)

CH0

CH1

2480

3100

223

3720

counts

λp = 850 nm

Ee = 220 μW/cm

2,

ATIME = 0xF6 (27ms) (3)

CH0

400

counts

ADC count value

ratio: CH1/CH0

White light (2)

0.036

0.072

0.108

Re

irradiance

responsivity

White light,

ATIME = 0xF6 (27 ms) (2)

CH0

CH1

11.4

14.2

1.0

17.1

counts/

(μW/cm2)

Gain scaling,

relative to 1x gain

setting

GAIN = 8x

CH0

CH1

7

7

8

8

9

9

x

GAIN = 16x

CH0

CH1

15

15

16

16

17

17

GAIN = 111x

Decoupling capacitor 25 mm

from VDD pin (5)

CH0

CH1

97

100

107

115

115

125