ams Datasheet

Page 9

[v1-00] 2016-Mar-22

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TSL2771 − Absolute Maximum Ratings

Figure 9:

Proximity Characteristics; VDD = 3 V, TA = 25°C, PEN = 1 (unless otherwise noted)

Note(s):

1. Proximity Operating Distance is dependent upon emitter properties and the reflective properties of the proximity surface. The

nominal value shown uses an IR emitter with a peak wavelength of 850nm and a 20º half angle. The proximity surface used is a 90%

reflective (white surface) 16

× 20-inch Kodak Gray Card. 60 mw/SR, 100 mA, 64 pulses, open view (no glass). Note: Greater distances

are achievable with appropriate system considerations.

Figure 10:

Wait Characteristics; VDD = 3 V, TA = 25°C, WEN = 1 (unless otherwise noted)

Parameter

Test Conditions

Condition

Min

Typ

Max

Unit

IDD

Supply current

LDR pulse ON

3

mA

ADC conversion time step size

PTIME = 0xFF

2.58

2.72

2.9

ms

ADC number of integration

steps

1

256

steps

ADC counts per step

PTIME = 0xFF

0

1023

counts

IR LED pulse count

0

255

pulses

pulse period

Two or more pulses

16

μs

LED pulse width — LED ON time

7.3

μs

LED drive current

ISINK sink current @

600 mV, LDR pin

PDRIVE=0

75

100

125

mA

PDRIVE=1

50

PDRIVE=2

25

PDRIVE=3

12.5

Operating distance (1)

18

inches

Parameter

Test

Conditions

Channel

Min

Typ

Max

Unit

Wait step size

WTIME = 0xFF

2.58

2.72

2.9

ms

Wait number of integration steps

1

256

steps