L99MM70XP datasheet(41/68 Pages) STMICROELECTRONICS

41 / 68 page

L99MM70XP

Electrical characteristics

Doc ID 022637 Rev 2

41/68

8.9.4

Electrochrome control

The voltages are referred to ground and currents are assumed positive, when the current

flows into the pin. 8 V

 V

S  16 V; Tamb = -40 °C...125 °C, unless otherwise specified.

Table 20.

Electrochrome control

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VCTRLmax

Maximum EC-control voltage

ECVL = ‘1’ (1)

1.4

1.6

ECVL = ‘0’ (1)

1.12

1.28

DNLECV

Differential non linearity

-1

LSB(2)

|dVECV|

Voltage deviation between

target and ECV

dVECV =Vtarget

(3) -V

ECV,

|IECDR| < 1 µA

-5% -

1LSB(2)

+5% +

1LSB(2)

dVECVnr

Difference voltage

between target

and ECV sets flag

if VECV is

below it

dVECV =Vtarget

(3) -V

ECV

Toggle bit5 = 1 Status reg. 3

120

dVECVhi

above it

dVECV =Vtarget

(3) -V

ECV

Toggle bit4 = 1 Status reg. 3

-120

tFECVNR

ECVNR filter time

µs

tFECO

ECVO filter time

µs

VECDRminHIGH

Output voltage range

IECDR = -10 µA

4.1

5.5

VECDRmaxLOW

IECDR =10µA

0.7

IECDR

Current into ECDR

Vtarget

(3) >V

ECV + 500 mV,

VECDR =3.5 V

-100

-10

µA

Vtarget

(3) <V

ECV -500 mV,

VECDR = 1.0 V; Vtarget =0V,

VECV =0.5 V

100

µA

Recdrdis

Pull down resistance at ECDR

in fast discharge mode and

while EC-mode is off

VECDR = 0.7 V, ECON = ‘1’,

EC<5:0> = 0 or ECON = ‘0’



DNLECFD

Differential non linearity

-1

LSB(2)

|dVECFD|

Voltage deviation between

target and ECFD

dVECFD =Vtarget

(3) -V

ECFD,

IECFD = 100 µA

-5% -

1LSB(2)

+5% +

1LSB(2)

dVECFDnr

(4)

Difference voltage

between target

and ECFD sets

flag if VECFD is

below it

dVECFD =Vtarget

(3) -V

ECFD

toggle status bit ECVNR = ’1’

120

dVECFDhi

above it

dVECFD =Vtarget

(3) -V

ECFD

toggle status bit ECVO = ‘1’

-120

Bit ECVL = ‘1’ or ‘0’: ECV voltage, where IECDR can change sign.

1 LSB (Least Significant Bit) = 23.8 mV.

Vtarget is set by bits EC <5:0> and bit ECVL; tested for each individual bit.

Not tested since pulling pin ECFD to a low voltage against the internal source follower may lead to an overcurrent at pin

ECFDHS or thermal shutdown.

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