TMD27721 Datasheet, PDF (6/35 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – DIGITAL ALS and PROXIMITY MODULE

TMD2772
DIGITAL ALS
and PROXIMITY MODULE
TAOS147E − DECEMBER 2012
Proximity Characteristics, V_DD = V_LEDA = 3 V, T_A = 255C, PEN = 1 (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
I_DD
Supply current
LED On
LED On, PDRIVE = 0
3
mA
100
I_LEDA
LEDA current (Note 1)
LED On, PDRIVE = 1
LED On, PDRIVE = 2
50
mA
25
PTIME ADC conversion steps
PTIME ADC conversion time
lid ^{PTIME ADC counts per step}
PPULSE LED pulses (Note 5)
LED On LED pulse width
a _{LED pulse period}
Proximity response, no target
v _(offset)
ill ^{Prox count, 100-mm target}
(Note 3)
LED On, PDRIVE = 3
PTIME = 0xFF ( = 1 conversion step)
PTIME = 0xFF ( = 1 conversion step)
PPULSE = 1, PDRIVE = 0
PPULSE = 2, PDRIVE = 0
PPULSE = 8, PDRIVE = 0, PGAIN = 4×, (Note 2)
73 mm × 83 mm, 90% reflective Kodak Gray Card,
PGAIN = 4×, PPULSE = 8, PDRIVE = 0, PTIME = 0xFF
(Note 4)
12.5
1
256 steps
2.58 2.73 2.9 ms
0
1023 counts
0
255 pulses
7.3
μs
16.0
μs
100
counts
450 520 590 counts
t _{NOTES: 1. Value is factory-adjusted to meet the Prox count specification. Considerable variation (relative to the typical value) is possible after}
G _{s adjustment.}
2. Proximity offset varies with power supply characteristics and noise.
A ^{t 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.
s n 6. Proximity test was done using the following circuit. See the Application Information: Hardware section for recommended
application circuit.
m ^{te VDD}
a _{on 1mF}
V_{DD 1}
3
GND
TMD2772
4 ^LEDA
5 ^LEDK
6 ^LDR
1 mF 22 mF
l ^c _{IR LED Characteristics, VDD = 3 V, TA = 255C}
a _PARAMETER
TEST CONDITIONS
ic ^{VF Forward Voltage}
V_R Reverse Voltage
P_O Radiant Power
n _{λp Peak Wavelength}
h ^Δλ ^{Spectral Radiation Bandwidth}
T_R Optical Rise Time
Tec ^{TF Optical Fall Time}
I_F = 20 mA
I_R = 10 μA
I_F = 20 mA
I_F = 20 mA
I_F = 20 mA
I_F = 100 mA, T_W = 125 ns, duty cycle = 25%
I_F = 100 mA, T_W = 125 ns, duty cycle = 25%
MIN TYP
1.4
5
4.5
850
40
20
20
MAX
1.5
40
40
UNIT
V
V
mW
nm
nm
ns
ns
The LUMENOLOGY r Company
r
r
www.taosinc.com
Copyright E 2012, TAOS Inc.
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