2. Hardware Design

2.1. What performance can be achieved?

A typical example of an application is a very small, single spot distance gauge (refer to Figure 17).

epc600 chip

with IR filter on top

Illumination LEDs

Figure 17: Low power, high performance distance gauge.

Size: 32 x 22 x 25 mm

Figure 18: Chip on PCB board

In this example, a range of up to 4m can be expected on white targets when using: two SFH4059 LEDs directly driven by the LED pin with

410µs.

The response time in this application is:

t

(refer also to chapter: Response time).

LED1

NC3

NC4

VREF

VDDIO

VDDHPX

VDDPX

VDDCP

VDDBS

XTAL1

XTAL2

VDDT

GNDM

SDATA

SCLK

HLLED/NC2

NC1

VDDPLL

VDDCORE

GNDLED

GNDPLL

GNDA

GND

VDD

epc600

1

2

3

4

5

6

7

8

9

10

11

12

13

14

17

18

19

20

21

22

23

24

VDD +8.5V

D1

BAS40

C9

C8

C7

C6

C5

C4

C3

10n

100n

1μ

3μ3

3μ3

3μ3

1μ

LED1

SFH4059

LED2

SFH4059

R2

4k7

R1

27R

C12

100n

GND

Low Z, fast switching connection (as short and wide conductors as possible)

15

16

C11

27p

C10

27p

Y1

4MHz

C2

1μ

C1

10μ

GND

+

D1A

BAV99

D1B

BAV99

VDDBS -5.0V

R3

0R

R4

1k

Microprocessor

SCLK

SDATA

+5V

R4

10k

Figure 19: Minimum part count application

© 2014 ESPROS Photonics Corporation

Characteristics subject to change without notice

17 / 30

Datasheet epc600 - V1.3

www.espros.ch