STA8090GA datasheet(26/32 Pages) STMICROELECTRONICS

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Electrical characteristics

STA8090GA

26/32

DS10820 Rev 5

4.8.3

OSCI oscillator specifications

The supported values of the embedded BOOT ROM are 16.368 MHz, 24.00 MHz,

26.00 MHz and 48.00 MHz.

The default values supported by the GNSS binary image is 26 MHz and 48 MHz, to enable

USB peripheral the 48 MHz is mandatory.

4.8.4

ADC specifications

This section gives the AC specification of the 10 bit Successive Approximation Register

ADC embedded in STA8090GA device. It is controlled by the ARM9 MCU through a

wrapper and an APB bridge as depicted in Figure 4 and it has a maximum conversion rate

of 1MSPS with 8 muxed analog input channels capability. An internal voltage reference is

used and analog/digital power supplies connections are implemented inside the device

without any needs of dedicated external pins.

Figure 4. SARADC connections

Table 23. Characteristics of external slow clock input

Symbol

Parameter

Min.

Typ.

Max.

Unit

TJIT (cc)

Cycle-to-cycle jitter

-70

—

TJIT (per)

Period jitter

-70

—

Variation

-500

—

500

ppm

TDUTY

Duty cycle

—

REFP

REFN

AIN0

AIN1

AIN7

VREF

D[9:0]

SARADC

ADC WRAPPER

VINL1

VDD12_MVR

APB

Bridge2

ADC_IN1

ADC_IN2

ADC_IN8

GND

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