TMD27727 datasheet(6/35 Pages) AMSCO

Part #	TMD27727

Description	DIGITAL ALS and PROXIMITY MODULE

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Manufacturer	AMSCO [ams AG]

Direct Link	http://www.ams.com

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TMD2772

DIGITAL ALS

and PROXIMITY MODULE

TAOS147

E − DECEMBER 2012

5

The LUMENOLOGY

r Company

r

Copyright

E 2012, TAOS Inc.

www.taosinc.com

Proximity Characteristics, VDD = VLEDA = 3 V, TA = 255C, PEN = 1 (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IDD

Supply current

LED On

3

mA

LED On, PDRIVE = 0

100

I

LEDA current (Note 1)

LED On, PDRIVE = 1

50

mA

ILEDA

LEDA current (Note 1)

LED On, PDRIVE = 2

25

mA

LED On, PDRIVE = 3

12.5

PTIME

ADC conversion steps

1

256

steps

PTIME

ADC conversion time

PTIME = 0xFF ( = 1 conversion step)

2.58

2.73

2.9

ms

PTIME

ADC counts per step

PTIME = 0xFF ( = 1 conversion step)

0

1023

counts

PPULSE

LED pulses (Note 5)

0

255

pulses

LED On

LED pulse width

PPULSE = 1, PDRIVE = 0

7.3

μs

LED pulse period

PPULSE = 2, PDRIVE = 0

16.0

μs

Proximity response, no target

(offset)

PPULSE = 8, PDRIVE = 0, PGAIN = 4

×, (Note 2)

100

counts

Prox count, 100-mm target

(Note 3)

73 mm

× 83 mm, 90% reflective Kodak Gray Card,

PGAIN = 4

×, PPULSE = 8, PDRIVE = 0, PTIME = 0xFF

(Note 4)

450

520

590

counts

NOTES: 1. Value is factory-adjusted to meet the Prox count specification. Considerable variation (relative to the typical value) is possible after

adjustment.

2. Proximity offset varies with power supply characteristics and noise.

3. ILEDA is factory calibrated to achieve this specification. Offset and crosstalk directly sum with this value and is system dependent.

4. No glass or aperture above the module. Tested value is the average of 5 consecutive readings.

5. These parameters are ensured by design and characterization and are not 100% tested.

6. Proximity test was done using the following circuit. See the Application Information: Hardware section for recommended

application circuit.

TMD2772

VDD

1

mF

1

3

4

VDD

GND

LDR

5

6

LEDK

LEDA

1

mF

22

mF

IR LED Characteristics, VDD = 3 V, TA = 255C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VF

Forward Voltage

IF = 20 mA

1.4

1.5

V

VR

Reverse Voltage

IR = 10 μA

5

V

PO

Radiant Power

IF = 20 mA

4.5

mW

λp

Peak Wavelength

IF = 20 mA

850

nm

Δλ

Spectral Radiation Bandwidth

IF = 20 mA

40

nm

TR

Optical Rise Time

IF = 100 mA, TW = 125 ns, duty cycle = 25%

20

40

ns

TF

Optical Fall Time

IF = 100 mA, TW = 125 ns, duty cycle = 25%

20

40

ns

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