SI4438 datasheet(8/44 Pages) SILABS

Numer części	SI4438

Szczegółowy opis	Low active power consumption

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Si4438

8

Rev 1.0

Table 5. Auxiliary Block Specifications1

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Temperature Sensor

Sensitivity

TSS

—

4.5

—

ADC

Codes/

°C

Low Battery Detector

Resolution

LBDRES

—50

—

mV

Microcontroller Clock

Output Frequency Range2

FMC

Configurable to Fxtal or Fxtal

divided by 2, 3, 7.5, 10, 15, or

30 where Fxtal is the reference

XTAL frequency. In addition,

32.768 kHz is also supported.

32.768K

—

Fxtal

Hz

Temperature Sensor

Conversion

TEMPCT

Programmable setting

—

3

—

ms

XTAL Range3

XTALRange

25

—

32

MHz

30 MHz XTAL Start-Up Time

t30M

Using XTAL and board layout in

reference design. Start-up time

will vary with XTAL type and

board layout.

—

250

—

µs

30 MHz XTAL Cap

Resolution

30MRES

—70

—

fF

32 kHz XTAL Start-Up Time

t32k

—2

—

sec

32 kHz Accuracy using

Internal RC Oscillator

32KRCRES

—

2500

—

ppm

POR Reset Time

tPOR

——

5

ms

Notes:

1.

All minimum and maximum values are guaranteed by production test unless otherwise stated. All typical values apply at

VDD = 3.3 V and 25 °C unless otherwise stated.

2.

Microcontroller clock frequency tested in production at 1 MHz, 30 MHz and 32.768 kHz. Other frequencies tested in

bench characterization.

3.

XTAL Range tested in production using an external clock source (similar to using a TCXO).

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