PAC1721 datasheet(5/92 Pages) MICROCHIP

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DS-20007088A-page 5

PAC1721

Power Accumulator Accuracy (1σ error range with more than 1,000 accumulations)

Accumulator Error

ACC_Err

—

0.8

—

VSENSE = 97 mV

—1

—

VSENSE = 10 mV

—1.5

—

VSENSE = 1 mV

—8

—

VSENSE = 100 µV

—15

—

VSENSE = 50 µV

Active Mode Timing

Time to First Communications

tINT_T

—

Time after VDD is applied and PAC1721 is

ready to initiate communications and

sampling. Note 1

Transition Time from Sleep

State to Start of Conversion

Cycle

tSLEEP_TO_ACTIVE

—

Time from when a register write initiates a

Sleep state exit to the start of a

conversion cycle for Single-shot modes.

A conversion cycle lasts 1 ms by default

and varies depending on ƒS. Note 1

Digital I/O Pins (SLOW/ALERT, PWRDN, SMBCLK, SMBDAT)

Input High Voltage

VIH

1.35

—

A0, A1, SDA and SCL pins

Input Low Voltage

VIL

—

0.8

A0, A1, SDA and SCL pins

Input High Voltage (PWRDN)VIH_PWRDN

1.35

—

PWRDN pin

Input Low Voltage (PWRDN)VIL_PWRDN

—

0.4

PWRDN pin

Input Hysteresis

VHYS

—

Only when A0 and A1 pins set as inputs

Output Low Voltage

VOL

—

0.4

Sinking current:

• 8 mA for the A0 and A1 pins

• 20 mA for SDA pin

Leakage Current

ILEAK

-7

—

µA

Powered

1.3

AC Electrical Specifications

AC Electrical Characteristics: Unless otherwise indicated, maximum values apply at TA = -40°C to +125°C, VDD = 2.7V to 5.5V,

VI/O = 1.62V to 5.5V and VBUS = 0V to 9V. Typical values are at TA = 25°C, VDD = 3.3V, VI/O = 3.3V, VBUS = 9V and

VSENSE = VSENSE+ – VSENSE– = 0V.

Parameters

Symbol

Min.

Typical

Max.

Units

Conditions

I2C/SMBus Timing

Clock Frequency

ƒCLK

0.01

—

MHz Fast-mode Plus.

No minimum if timeout is disabled.

0.01

—

3.4

MHz High-speed Mode.

No minimum if timeout is disabled.

Spike Suppression

tSP

—

Fast-mode Plus

—

High-speed Mode

Bus Free Time: Stop to Start

tBUF

0.5

—

µs

Note 1

Hold Time after Repeated Start

Condition

tHD:STA

0.26

—

µs

Fast-mode Plus, Note 1

0.16

—

µs

High-speed Mode, Note 1

Repeated Start Condition

Setup Time

tSU:STA

0.26

—

µs

Fast-mode Plus, Note 1

0.16

—

µs

High-speed Mode, Note 1

Note 1:

In compliance with the SMBus 3.1 standard.

No production testing. Characterization only.

1.2

DC Electrical Specifications (Continued)

DC Electrical Characteristics: Unless otherwise indicated, all parameters apply at TA = -40°C to +125°C, VDD = 2.7V to 5.5V and

VBUS = 0V to 9V. Typical values are at TA = 25°C, VDD = 3.3V and VSENSE = VSENSE+ – VSENSE– = 0V.

Parameters

Symbol

Min.

Typical

Max.

Units

Conditions

Note 1:

No production testing. Characterization only.

All states, including leakage current and average value of capacitively coupled switching current.

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