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Table of Contents

General Description............................................................................................................................................................................................1

Features.............................................................................................................................................................................................................1

Applications........................................................................................................................................................................................................1

Functional Block Diagram..................................................................................................................................................................................1

Absolute Maximum Ratings (Note 1, 2) ............................................................................................................................................................3

Operating Ratings..............................................................................................................................................................................................3

Electrical Characteristics....................................................................................................................................................................................3

Timing and optical Characteristics.....................................................................................................................................................................4

Other Parameters...............................................................................................................................................................................................5

Pin Configuration................................................................................................................................................................................................6

Layout information..............................................................................................................................................................................................7

CSP-24 Package (all measures in mm, )....................................................................................................................................................7

Design precautions......................................................................................................................................................................................7

ESD protection.............................................................................................................................................................................................8

Reflow Solder Profile..........................................................................................................................................................................................8

Packaging Information (all measures in mm).....................................................................................................................................................8

Ordering information...........................................................................................................................................................................................8

Functional Description........................................................................................................................................................................................9

1. Operation..................................................................................................................................................................................................9

1.1. Introduction............................................................................................................................................................................................9

1.2. General overview...................................................................................................................................................................................9

1.3. Operational mode................................................................................................................................................................................10

1.3.1. Distance measurement.....................................................................................................................................................................10

1.3.2. Unambiguity range and integration time base..................................................................................................................................11

1.3.3. Sensitivity, integration time and operating range.............................................................................................................................11

1.3.4. Ambient-light suppression................................................................................................................................................................12

1.3.5. Quality of the measurement result....................................................................................................................................................12

1.3.6. Ambient-light measurement (optical power-meter)..........................................................................................................................14

1.3.7. Temperature metering......................................................................................................................................................................14

1.3.8. Measurement sequence...................................................................................................................................................................15

1.3.9. Calibration and compensations........................................................................................................................................................16

Fix pattern noise........................................................................................................................................................................................16

High dynamic rang within as scene...........................................................................................................................................................16

Averaging of data.......................................................................................................................................................................................16

1.3.10. Extended operating range..............................................................................................................................................................16

1.3.11. Multi 3D TOF camera application...................................................................................................................................................16

2. Hardware Design....................................................................................................................................................................................17

2.1. What performance can be achieved?..................................................................................................................................................17

2.2. General Hardware Configuration.........................................................................................................................................................18

2.3. Power Supply and Clock generation...................................................................................................................................................18

2.4. On-chip LED driver..............................................................................................................................................................................19

LEDs with a +5V supply.............................................................................................................................................................................19

Short range application design (LED supply from 8.5V)...........................................................................................................................19

Mid range application design (LED supply from +8.5V)............................................................................................................................20

2.5. External LED driver..............................................................................................................................................................................20

3. Instruction Set.........................................................................................................................................................................................21

3.1. SPI interface........................................................................................................................................................................................21

3.2. SPI commands and responses............................................................................................................................................................23

3.3. Communication error handling............................................................................................................................................................24

Error detection...........................................................................................................................................................................................24

Recovery sequence...................................................................................................................................................................................24

3.4. Start-up / load Parameter and configuration memory.........................................................................................................................25

3.5. Registers and user configuration parameters.....................................................................................................................................26

3.5.1. Command: WRITE Integration time..................................................................................................................................................27

3.5.2. Command: WRITE Measurement type............................................................................................................................................27

3.5.3. Command: WRITE LED modulation clock.......................................................................................................................................28

3.5.4. Command: READ Status..................................................................................................................................................................28

3.5.5. Command: READ Saturated pixels..................................................................................................................................................29

3.5.6. Command: READ Data.....................................................................................................................................................................29

3.5.7. Command: WRITE Set trigger..........................................................................................................................................................30

3.5.8. Examples of SPI command sequences............................................................................................................................................31

3.5.9. Cycle time calculation.......................................................................................................................................................................32

LED on-time and LED duty cycle...............................................................................................................................................................32

4. Optical Design Considerations...............................................................................................................................................................33

Photosensitive area...................................................................................................................................................................................33

Signal sensitivity........................................................................................................................................................................................33

Ambient-light suppression.........................................................................................................................................................................33

Operating range.........................................................................................................................................................................................33

IMPORTANT NOTICE.....................................................................................................................................................................................34

© 2014 ESPROS Photonics Corporation

Characteristics subject to change without notice

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Datasheet epc610 - V1.7

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