L99DZ70XP datasheet(18/47 Pages) STMICROELECTRONICS

18 / 47 page

Electrical specifications

L99DZ70XP

18/47

Doc ID 15162 Rev 3

Figure 3.

Electrochrome control block diagram

2.5

SPI - Electrical characteristics

VS = 8 to 16V, VCC = 4.5 to 5.5V, Tj = - 40 to 150°C, unless otherwise specified. The

voltages are referred to GND and currents are assumed positive, when the current flows into

the pin.

13.9

IECDR

Current into ECDR

Vtarget >VECV + 500mV,

VECDR = 3.5V

-100

-10

µA

13.10

Vtarget < VECV - 500mV,

VECDR = 1.0V;

Vtarget=1 LSB;

VECV=0.5V

100

µA

13.11

Recdrdis

Pulldown resistance at

ECDR in fast

discharge mode

VECDR = 0.7V ;

Cntrl Reg 1: bit 8 and bit

1 = 1, all other bits = 0

13.12

IQECDR

Quiescent current

VECDR = VS;

Cntrl. reg 1 bit 1 = 0

1µA

Bit 7 to 2 = ‘1’ control register 1: ECV voltage, where IIECDR can change sign.

1 LSB (Least Significant Bit)= 23.8 mV.

Vtarget is set by bit 7 to 2 of control register 1 and bit 0 of control register 2; tested for each individual bit.

Table 13.

Electrochrome control (continued)

Item

Symbol

Parameter

Test condition

Min. Typ. Max.

Unit

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