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TMD2672 Datasheet(PDF) 5 Page - ams AG |
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TMD2672 Datasheet(HTML) 5 Page - ams AG |
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5 / 29 page  TMD2672 DIGITAL PROXIMITY DETECTOR TAOS149C − AUGUST 2012 4 r r Copyright E 2012, TAOS Inc. The LUMENOLOGY r Company www.taosinc.com Operating Characteristics, VDD = 3 V, TA = 255C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Active — LDR pulse off 195 250 IDD Supply current Wait state 90 μA IDD Supply current Sleep state — no I2C activity 2.2 4 μA V INT SDA output low voltage 3 mA sink current 0 0.4 V VOL INT, SDA output low voltage 6 mA sink current 0 0.6 V I LEAK Leakage current, SDA, SCL, INT pins −5 5 μA I LEAK Leakage current, LDR pin −5 5 μA V SCL SDA input high voltage TMD26721 0.7 VDD V VIH SCL, SDA input high voltage TMD26723 1.25 V V SCL SDA input low voltage TMD26721 0.3 VDD V VIL SCL, SDA input low voltage TMD26723 0.54 V 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. TMD2672 VDD 1 mF 1 3 4 VDD GND LDR 5 6 LEDK LEDA 1 mF 22 mF |
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