TCS3772 datasheet(6/33 Pages) AMSCO

6 / 33 page

TCS3772

COLOR LIGHT-TO-DIGITAL CONVERTER

with PROXIMITY SENSING

TAOS145B − SEPTEMBER 2012

The LUMENOLOGY

r Company

E 2012, TAOS Inc.

www.taosinc.com

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IDD

Supply current

LDR pulse on

ADC conversion time step size

PTIME = 0xFF

2.27

2.4

2.56

ADC number of integration steps

(Note 1)

256

steps

ADC counts per step (Note 1)

PTIME = 0xFF

1023

counts

ADC count value

λp = 850 nm, Ee = 770.1 μW/cm2, PTIME = 0xFB,

PPULSE = 1 (Note 3)

1350

1900

counts

ADC output responsivity

λp = 850 nm, PTIME = 0xFF, PPULSE = 1 (Note 3)

0.175

0.211

0.247

counts/

μW/cm2

Noise (Notes 1 2 3)

0 PTIME

0xFF PPULSE

8 (Note 6)

%FS

Noise (Notes 1, 2, 3)

Ee = 0, PTIME = 0xFF, PPULSE = 8 (Note 6)

2% FS

LED pulse count (Note 1)

255

pulses

LED pulse period

14.0

μs

LED pulse width — LED on time

6.3

μs

PDRIVE = 0

106

132

LED drive current

ISINK sink current @ 1.6 V,

PDRIVE = 1

LED drive current

ISINK sink current @ 1.6 V,

LDR pin

PDRIVE = 2

PDRIVE = 3

12.5

Maximum operating distance

(Notes 1, 4, 5)

PDRIVE = 0 (100 mA), PPULSE = 64

Emitter:

λp = 850 nm, 20° half angle, and 60 mW/sr

Object: 16

× 20-inch, 90% reflective Kodak Gray Card

(white surface)

Optics: Open view (no glass, no optical attenuation)

inches

NOTES: 1. Parameter is ensured by design or characterization and is not tested.

2. Proximity noise is defined as one standard deviation of 600 samples.

3. Proximity noise typically increases as

√PPULSE

4. Greater operating distances are achievable with appropriate optical system design considerations. See available TAOS application

notes for additional information.

5. Maximum operating distance is dependent upon emitter and the reflective properties of the object’s surface.

6. Proximity noise test was done using the following circuit:

TCS3772

VDD

15.0

VDD

GND

LDR

Wait Characteristics, VDD = 3 V, TA = 255C, WEN = 1 (unless otherwise noted)

PARAMETER

TEST CONDITIONS

CHANNEL

MIN

TYP

MAX

UNIT

Wait step size

WTIME = 0xFF

2.27

2.4

2.56

Wait number of steps (Note 7)

256

steps

NOTE 7: Parameter ensured by design and is not tested.

TCS3772 Arkusz danych(PDF) 6 Page - ams AG

TCS3772 Arkusz danych(HTML) 6 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

Arkusz danych Pobierz

Link URL