C8051F331 datasheet(65/216 Pages) SILABS

65 / 216 page

Rev. 1.5

C8051F330/1/2/3/4/5

Table 7.1. Voltage Reference Electrical Characteristics

VDD = 3.0 V; –40 to +85 °C unless otherwise specified.

Parameter

Conditions

Min

Typ

Max

Units

Internal Reference (REFBE = 1)

Output Voltage

25 °C ambient

2.38

2.44

2.50

VREF Short-Circuit Current

—

VREF Temperature

Coefficient

—

ppm/°C

Load Regulation

Load = 0 to 200 µA to AGND

—

0.5

—

ppm/µA

VREF Turn-on Time 1

4.7 µF tantalum, 0.1 µF ceramic

bypass

—

VREF Turn-on Time 2

0.1 µF ceramic bypass

—

µs

VREF Turn-on Time 3

no bypass cap

—

µs

Power Supply Rejection

—

140

—

ppm/V

External Reference (REFBE = 0)

Input Voltage Range

—

VDD

Input Current

Sample Rate = 200 ksps; VREF =

3.0 V

—

µA

Power Specifications

ADC Bias Generator

BIASE = ‘1’ or AD0EN = ‘1’ or

IOSCEN = ‘1’

—

100

—

µA

Reference Bias Generator

REFBE = ‘1’ or TEMPE = ‘1’ or

IDA0EN = ‘1’

—

µA

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