SI7201 datasheet(4/31 Pages) SILABS

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Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Current Consumption

Average power depends on the

sample rate and percent of time

spent sampling versus sleep mode

or idle mode. See the ordering

guide for average power calcula-

tions for specific devices.

IDD

Sleep timer enabled average at

VDD = 3.3 V and 200 msec sleep

time

0.4

μA

Sleep mode

VDD = 3.3 V, T = 25 °C

VDD = 3.3 V, T = 70 °C

VDD = 5.5 V, T = 125 °C

1000

5000

Conversion in progress

VDD = 1.8V

VDD = 3.3 V

VDD = 5.5 V

3.5

6.8

5.5

8.0

Conversion in progress high volt-

age parts

VDD = 3.3 to 26.5 V

6.5

8.5

Idle mode low voltage parts

VDD = 1.71 to 5.5 V

0.6

Idle mode high voltage parts

VDD = 3.3 to 26.5 V

0.9

1.2

Conversion Time

TCONV

First conversion when waking from

sleep or idle

µs

Additional conversions in a burst

8.8

µs

Sample Rate

FSAMPLE Parts can be configured for sleep

or idle between samples. Sleep is

lower power, but the fastest sam-

pling rate is 8 kHz. Idle allows sam-

pling rate to be configured to be as

high as 113 kHz. See the ordering

guide for details.

Wake Up Time

TWAKE

Time from VDD > 1.71 V to first

measurement

msec

Note:

1. TAMPERb and DIS pin specifications apply when the pin is present (Si7203/4).

2. Idle time can be factory programmed from 13.2 μsec to 206 msec ±10% or set to zero in which case conversions are done every

8.8 μsec. Normally idle time is only used at higher sample speeds.

3. For high voltage parts (VDD = 26.5 V maximum), the power on ramp should be faster than 10 V per second in the start-up region

from 2 to 3 V.

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