TSL2563FN Datasheet TSL2562FN, TSL2563T, TSL2563FN | P25-P27

TSL2562, TSL2563

LOW-VOLTAGE

LIGHT-TO-DIGITAL CONVERTER

TAOS066N − AUGUST 2010

The LUMENOLOGY r Company

www.taosinc.com

#define B2T 0x0214 // 0.0325 * 2^LUX_SCALE

#define M2T 0x02d1 // 0.0440 * 2^LUX_SCALE

#define K3T 0x00c0 // 0.375 * 2^RATIO_SCALE

#define B3T 0x023f // 0.0351 * 2^LUX_SCALE

#define M3T 0x037b // 0.0544 * 2^LUX_SCALE

#define K4T 0x0100 // 0.50 * 2^RATIO_SCALE

#define B4T 0x0270 // 0.0381 * 2^LUX_SCALE

#define M4T 0x03fe // 0.0624 * 2^LUX_SCALE

#define K5T 0x0138 // 0.61 * 2^RATIO_SCALE

#define B5T 0x016f // 0.0224 * 2^LUX_SCALE

#define M5T 0x01fc // 0.0310 * 2^LUX_SCALE

#define K6T 0x019a // 0.80 * 2^RATIO_SCALE

#define B6T 0x00d2 // 0.0128 * 2^LUX_SCALE

#define M6T 0x00fb // 0.0153 * 2^LUX_SCALE

#define K7T 0x029a // 1.3 * 2^RATIO_SCALE

#define B7T 0x0018 // 0.00146 * 2^LUX_SCALE

#define M7T 0x0012 // 0.00112 * 2^LUX_SCALE

#define K8T 0x029a // 1.3 * 2^RATIO_SCALE

#define B8T 0x0000 // 0.000 * 2^LUX_SCALE

#define M8T 0x0000 // 0.000 * 2^LUX_SCALE

//−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−

// CS package coefficients

//−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−

// For 0 <= Ch1/Ch0 <= 0.52

// Lux/Ch0 = 0.0315−0.0593*((Ch1/Ch0)^1.4)

// piecewise approximation

// For 0 <= Ch1/Ch0 <= 0.13

// Lux/Ch0 = 0.0315−0.0262*(Ch1/Ch0)

// For 0.13 <= Ch1/Ch0 <= 0.26

// Lux/Ch0 = 0.0337−0.0430*(Ch1/Ch0)

// For 0.26 <= Ch1/Ch0 <= 0.39

// Lux/Ch0 = 0.0363−0.0529*(Ch1/Ch0)

// For 0.39 <= Ch1/Ch0 <= 0.52

// Lux/Ch0 = 0.0392−0.0605*(Ch1/Ch0)

// For 0.52 < Ch1/Ch0 <= 0.65

// Lux/Ch0 = 0.0229−0.0291*(Ch1/Ch0)

// For 0.65 < Ch1/Ch0 <= 0.80

// Lux/Ch0 = 0.00157−0.00180*(Ch1/Ch0)

// For 0.80 < Ch1/Ch0 <= 1.30

// Lux/Ch0 = 0.00338−0.00260*(Ch1/Ch0)

// For Ch1/Ch0 > 1.30

// Lux = 0

//−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−

#define K1C 0x0043 // 0.130 * 2^RATIO_SCALE

#define B1C 0x0204 // 0.0315 * 2^LUX_SCALE

#define M1C 0x01ad // 0.0262 * 2^LUX_SCALE

#define K2C 0x0085 // 0.260 * 2^RATIO_SCALE

#define B2C 0x0228 // 0.0337 * 2^LUX_SCALE

#define M2C 0x02c1 // 0.0430 * 2^LUX_SCALE

#define K3C 0x00c8 // 0.390 * 2^RATIO_SCALE

#define B3C 0x0253 // 0.0363 * 2^LUX_SCALE

#define M3C 0x0363 // 0.0529 * 2^LUX_SCALE

TSL2562, TSL2563

LOW-VOLTAGE

LIGHT-TO-DIGITAL CONVERTER

TAOS066N − AUGUST 2010

The LUMENOLOGY r Company

www.taosinc.com

#define K4C 0x010a // 0.520 * 2^RATIO_SCALE

#define B4C 0x0282 // 0.0392 * 2^LUX_SCALE

#define M4C 0x03df // 0.0605 * 2^LUX_SCALE

#define K5C 0x014d // 0.65 * 2^RATIO_SCALE

#define B5C 0x0177 // 0.0229 * 2^LUX_SCALE

#define M5C 0x01dd // 0.0291 * 2^LUX_SCALE

#define K6C 0x019a // 0.80 * 2^RATIO_SCALE

#define B6C 0x0101 // 0.0157 * 2^LUX_SCALE

#define M6C 0x0127 // 0.0180 * 2^LUX_SCALE

#define K7C 0x029a // 1.3 * 2^RATIO_SCALE

#define B7C 0x0037 // 0.00338 * 2^LUX_SCALE

#define M7C 0x002b // 0.00260 * 2^LUX_SCALE

#define K8C 0x029a // 1.3 * 2^RATIO_SCALE

#define B8C 0x0000 // 0.000 * 2^LUX_SCALE

#define M8C 0x0000 // 0.000 * 2^LUX_SCALE

// lux equation approximation without floating point calculations

//////////////////////////////////////////////////////////////////////////////

// Routine: unsigned int CalculateLux(unsigned int ch0, unsigned int ch0, int iType)

// Description: Calculate the approximate illuminance (lux) given the raw

// channel values of the TSL2562. The equation if implemented

// as a piece−wise linear approximation.

// Arguments: unsigned int iGain − gain, where 0:1X, 1:16X

// unsigned int tInt − integration time, where 0:13.7mS, 1:100mS, 2:402mS,

// 3:Manual

// unsigned int ch0 − raw channel value from channel 0 of TSL2562

// unsigned int ch1 − raw channel value from channel 1 of TSL2562

// unsigned int iType − package type (T or CS)

// Return: unsigned int − the approximate illuminance (lux)

//////////////////////////////////////////////////////////////////////////////

unsigned int CalculateLux(unsigned int iGain, unsigned int tInt, unsigned int ch0,

unsigned int ch1, int iType)

{

//−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−

// first, scale the channel values depending on the gain and integration time

// 16X, 402mS is nominal.

// scale if integration time is NOT 402 msec

unsigned long chScale;

unsigned long channel1;

unsigned long channel0;

switch (tInt)

{

case 0: // 13.7 msec

chScale = CHSCALE_TINT0;

break;

case 1: // 101 msec

chScale = CHSCALE_TINT1;

break;

default: // assume no scaling

chScale = (1 << CH_SCALE);

TSL2562, TSL2563

LOW-VOLTAGE

LIGHT-TO-DIGITAL CONVERTER

TAOS066N − AUGUST 2010

The LUMENOLOGY r Company

www.taosinc.com

break;

}

// scale if gain is NOT 16X

if (!iGain) chScale = chScale << 4; // scale 1X to 16X

// scale the channel values

channel0 = (ch0 * chScale) >> CH_SCALE;

channel1 = (ch1 * chScale) >> CH_SCALE;

// find the ratio of the channel values (Channel1/Channel0)

// protect against divide by zero

unsigned long ratio1 = 0;

if (channel0 != 0) ratio1 = (channel1 << (RATIO_SCALE+1)) / channel0;

// round the ratio value

unsigned long ratio = (ratio1 + 1) >> 1;

// is ratio <= eachBreak ?

unsigned int b, m;

switch (iType)

{

case 0: // T, FN, CL package

if ((ratio >= 0) && (ratio <= K1T))

{b=B1T; m=M1T;}

else if (ratio <= K2T)

{b=B2T; m=M2T;}

else if (ratio <= K3T)

{b=B3T; m=M3T;}

else if (ratio <= K4T)

{b=B4T; m=M4T;}

else if (ratio <= K5T)

{b=B5T; m=M5T;}

else if (ratio <= K6T)

{b=B6T; m=M6T;}

else if (ratio <= K7T)

{b=B7T; m=M7T;}

else if (ratio > K8T)

{b=B8T; m=M8T;}

break;

case 1:// CS package

if ((ratio >= 0) && (ratio <= K1C))

{b=B1C; m=M1C;}

else if (ratio <= K2C)

{b=B2C; m=M2C;}

else if (ratio <= K3C)

{b=B3C; m=M3C;}

else if (ratio <= K4C)

{b=B4C; m=M4C;}

else if (ratio <= K5C)

{b=B5C; m=M5C;}

else if (ratio <= K6C)

{b=B6C; m=M6C;}

else if (ratio <= K7C)

{b=B7C; m=M7C;}

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TSL2563FN

Mfr. #:

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ams

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Light to Digital Converters Ambient Light Sensor Light to Digital

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TSL2563FN

TSL2563FN

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