ST7LITE49K2 datasheet(228/245 Pages) STMICROELECTRONICS

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Electrical characteristics

ST7LITE49K2

228/245

Figure 125. ADC accuracy characteristics

Table 103.

Amplifier characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDD(AMP)

Amplifier operating voltage

3.6

5.5

VIN

Amplifier input voltage(1)

Please refer to the Application Note AN1830 for details of TE% vs Vin.

VDD = 3.6 V

350

VDD = 5 V

500

VOFFSET

(2)

Data based on characterization results over the whole temperature range, not tested in production.

Amplifier output offset

voltage(3)

Refer to the offset variation in temperature below

VDD= 5 V

200

VSTEP

(2)

Step size for monotonicity(4)

Monotonicity guaranteed if VIN increases or decreases in steps of min. 5mV.

VDD = 3.6 V

3.5

VDD = 5 V

4.89

Linearity (2)

Output voltage response

linear

Gain factor

(2)

Amplified analog input gain(5)

For precise conversion results it is recommended to calibrate the amplifier at the following two points: offset

at VINmin = 0V ; gain at full scale (for example VIN = 430 mV)

Vmax (2)

Output linearity max voltage

VINmax = 430 mV,

VDD = 5 V

3.65

Vmin (2)

Output linearity min voltage

200

1LSBIDEAL

VDD VSS

–

1024

--------------------------------

Vin (LSBIDEAL)

(1) Example of an actual transfer curve

(2) The ideal transfer curve

(3) End point correlation line

ET=Total Unadjusted Error: maximum deviation

between the actual and the ideal transfer

curves.

EO=Offset Error: deviation between the first

actual transition and the first ideal one.

EG=Gain Error: deviation between the last

ideal transition and the last actual one.

ED=Differential Linearity Error: maximum

deviation between actual steps and the ideal

one.

EL=Integral Linearity Error: maximum deviation

between any actual transition and the end point

correlation line.

Digital Result

1023

1022

1021

1021 1022 1023 1024

(1)

(2)

(3)

VDD

VSS

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