MAX11068 datasheet(4/82 Pages) MAXIM

4 / 82 page

12-Channel, High-Voltage Sensor, Smart

Data-Acquisition Interface

ELECTRICAL CHARACTERISTICS (continued)

(TA = TMIN to TMAX, unless otherwise noted. VGNDU = VDCIN = 18V to +60V, typical values are at TA = +25NC, unless otherwise

specified from -40NC to +105NC per the application circuit in Figure 4.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

LINEAR REGULATOR +3.4V (VAA)

Input Voltage Range

VDCIN

0 < ILOAD < 8mA

6.0

Output Voltage

VVAA

0 < ILOAD < 8mA;

6V < VDCIN < 70V

3.25

3.4

3.55

Short-Circuit Current

VAA = 0V, 6V < VDCIN < 30V

Power-On Reset Threshold

(Note 3)

Falling VAA

2.85

2.95

3.05

Rising VAA

2.9

3.0

3.1

POR threshold hysteresis

0.01

Thermal Shutdown

Rising temperature

+145

Thermal-Shutdown Hysteresis

CHARGE PUMP +3.4V

Output Voltage

VVDDU - VGNDU

ILOAD = 0 at 0.1FF CP+ to CP-

3.2

3.4

3.55

1mA = ILOAD at 0.1FF CP+ to CP-

3.2

2.5

3.55

Charge-Pump Efficiency

IVDDU/IGNDU - IVDDU at 2.7V,

VDDU - GNDU

Charge-Pump Undervoltage

Threshold

VCPUV

2.0

2.7

3.2

INTERNAL OSCILLATORS (32.768kHz, 6.0MHz)

Internal 32.768kHz Oscillator

Frequency

fWD-OSC

32.113 32.768 33.423

kHz

Internal 6.0MHz Oscillator

Frequency

fHF-OSC

5.82

6.0

6.18

MHz

I2C LOWER PORT SCLL, SDAL, ALRML (Relative to GNDL, VDDL = Nominal 3.4V)

SDAL, SCLL Input Voltage Low

0.3 x

VVDDL

SDAL, SCLL Input Voltage High

0.7 x

VVDDL

SDAL, SCLL Input Hysteresis

0.2

0.1 x

VVDDL

0.5

SDAL, ALRML Output Voltage Low

At sink = 3mA

0.4

SDAL, SCLL Leakage Current

VSDAL = VSCLL = 1.5V

1.0

SDAL, Managed Resistance

RACTIVE_EDGE Active edge

0.5

Managed passive state

Off passive state

tONE_SHOT

tONE_SHOT (active edge pulse)

150

250

380

SDAL 1-TAU Capacitance

C1_TAU

SDAL rises to 70% within active edge

time when loaded with this capacitance

120

280

550

ALRML Output High Voltage

At source = 3mA

VDDL -

0.4

ALRML Heartbeat Frequency

OSC = 32.768kHz Q2.0%

16,000 16,384 16,711

kHz

Lower Port Input Capacitance

SCLL, SDAL, ALRML

MAX11068

Maxim Integrated

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