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TMD27723 Datasheet(PDF) 6 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS |
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TMD27723 Datasheet(HTML) 6 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS |
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6 / 35 page  TMD2772 DIGITAL ALS and PROXIMITY MODULE TAOS147 E − DECEMBER 2012 5 The LUMENOLOGY r Company r 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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