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TMD2671
DIGITAL PROXIMITY DETECTOR
TAOS144B ? SEPTEMBER 2012
Operating Characteristics, V DD = 3 V, T A = 25 5 C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Active: Proximity and Wait Delay states
175
250
I DD
Supply current
Wait mode
Sleep mode
3 mA sink current
0
65
2.5
4
0.4
μ A
V OL
I LEAK
I LEAK
INT, SDA output low voltage
Leakage current, SDA, SCL, INT pins
Leakage current, LDR pin
6 mA sink current
0
?5
0.6
5
10
V
μ A
μ A
V IH
V IL
SCL, SDA input high voltage
SCL, SDA input low voltage
TMD26711
TMD26713
TMD26711
TMD26713
0.7 V DD
1.25
0.3 V DD
0.54
V
V
Proximity Characteristics, V DD = V LEDA = 3 V, T A = 25 5 C, PEN = 1 (unless otherwise noted)
I DD
PARAMETER
Supply current — LDR pulse on
TEST CONDITIONS
MIN
TYP
3
MAX
UNIT
mA
ADC conversion time step size
ADC number of integration steps
PTIME = 0xFF
1
2.72
256
ms
steps
ADC counts per step
Proximity IR LED pulse count
Proximity pulse period
PTIME = 0xFF
0
0
16.3
1023
255
counts
pulses
μ s
PDRIVE = 0 (100% current)
PDRIVE = 1 (50% current)
100
50
I LEDA
LED current @ V 600 mV, LDR pin sink (Note 1)
PDRIVE = 2 (25% current)
25
mA
PDRIVE = 3 (12.5% current)
12.5
T LDR
On time per pulse
Proximity response, no target (offset)
PDRIVE = 1
PDRIVE = 0, PPULSE = 8 (Note 2)
7.2
100
μ s
Counts
73 mm × 83 mm, 90% reflective Kodak
Prox count, 100-mm target (Note 3)
Gray Card,
PPULSE = 8, PDRIVE = 0, PTIME =
414
520
624
counts
0xFF (Note 4)
NOTES: 1. Value is factory-adjusted to meet the Prox count specification. Considerable variation (relative to the typical value) is possible after
adjustment.
2. No reflective surface above the module. Proximity offset varies with power supply characteristics and noise.
3. I LEDA 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.
V DD
V DD
1
4
LEDA
1 m F
GND
3
TMD2671
5
6
LEDK
LDR
1 m F
22 m F
Copyright E 2012, TAOS Inc.
4
r
www.taosinc.com
r
The LUMENOLOGY r Company
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