ADM1177-2ARMZ-R7 datasheet(4/16 Pages) AD

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ADM1177

Preliminary Technical Data

Rev. PrD | Page 4 of 16

Parameter

Min

Typ

Max

Units

Conditions

MONITORING ACCURACY1

Current Sense Absolute Accuracy

TBD

VSENSE = 75 mV

−2.3

+2.2

VSENSE = 75 mV, @ 0°C to +70°C

TBD

VSENSE = 50mV

−2.5

+2.5

VSENSE = 50 mV, @ 0°C to +70°C

TBD

VSENSE = 25mV

−2.8

+2.8

VSENSE = 25mV, @ 0°C to +70°C

−3.5

+3.5

VSENSE = 12.5 mV, @ 25°C

Current Sense Accuracy, TC

±0.01

%/°C

VSENSE for ADC full-scale

105

Voltage Sense Accuracy

−1.5

+1.5

VVCC = 3.0 V to 5.5V(VRANGE = 1)

−1.5

+1.5

VVCC = 10.8 V to 13.2V(VRANGE = 0)

VCC for ADC full-scale, low range

6.656

VRANGE = 1

VCC for ADC full-scale, high range

26.6282

VRANGE = 0

I2C Timing3

Low level input voltage, VIL

0.99

High level input voltage, VIH

2.31

Low level output voltage on SDA, VOL

0.4

IOL = 3mA

Output fall time on SDA from VIHMIN to VILMAX

20+0.1CB

250

CB = bus capacitance from SDA to GND

Maximum width of spikes suppressed by input

filtering on SDA and SCL pins

250

Input current, II, on SDA/SCL when not driving out

a logic low

−10

+10

µA

Input capacitance on SDA/SCL

SCL clock frequency, fSCL

400

kHz

LOW period of the SCL clock

600

HIGH period of the SCL clock

1300

Setup time for a repeated START condition, tSU;STA

600

SDA output data hold time, tHD;DAT

100

Set-up time for a stop condition, tSU;STO

600

Bus free time between a STOP and a START

condition, tBUF

1300

Capacitive load for each bus line

400

1 Monitoring accuracy is a measure of the error in a code that is read back for a particular voltage/current. This is a combination of amplifier error, reference error and

ADC error.

2The maximum operating voltage is limited to VVCC =14 V which corresponds to an ADC code of 871.

3The following conditions apply to all timing specifications: VBUS =3.3V, TA =25°C. All timings refer to VIHMIN and VILMAX.

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