SI4438 Datasheet, PDF (8/44 Pages) Silicon Laboratories – Low active power consumption

Si4438
Table 5. Auxiliary Block Specifications¹
Parameter
Symbol
Test Condition
Min
Typ Max Unit
Temperature Sensor
TS_S
—
Sensitivity
Low Battery Detector
Resolution
LBD_RES
Microcontroller Clock
Output Frequency Range²
F_MC
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.
Temperature Sensor
Conversion
TEMP_CT
Programmable setting
XTAL Range³
XTAL_Range
30 MHz XTAL Start-Up Time t_30M Using XTAL and board layout in
reference design. Start-up time
will vary with XTAL type and
board layout.
30 MHz XTAL Cap
Resolution
30M_RES
32 kHz XTAL Start-Up Time
32 kHz Accuracy using
Internal RC Oscillator
t_32k
32KRC_RES
POR Reset Time
t_POR
—
32.768K
—
25
—
—
—
—
—
4.5
50
—
3
—
250
70
2
2500
—
— ADC
Codes/
°C
—
mV
Fxtal Hz
—
ms
32 MHz
—
µs
—
fF
—
sec
—
ppm
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).
8
Rev 1.0