AN1830 datasheet(7/15 Pages) STMICROELECTRONICS

부품명	AN1830

상세설명	ACHIEVING HIGH ACCURACY AND 13-BIT RESOLUTION WITH ST7LITE2 ADC

PDF	15 Pages

Scroll/Zoom	100%

제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

Logo

7 / 15 page

7/15

ACHIEVING HIGH ACCURACY AND 13-BIT RESOLUTION WITH ST7LITE2 ADC

Figure 4 Transfer curve for the amplifier when VDD = 5V

The state of control signals for this mode should be:

AMPSEL = 1

AMPCAL = 0

3) Amplifier output corresponds to 0V input (Offset Calibration)

To select this mode the state of the control signals for this mode should be:

AMPSEL= 1

AMPCAL = 1

Since VOUT at VIN = 0V is non-zero, therefore it has to be recorded once and then sub-

tracted from each of the amplified-and-converted output digital codes. This offset can be

recorded without having to supply 0V at VIN.

The above modes and the state of digital control signals required for each mode are shown in

Table 3.

Table 3 Operating Mode

Operating Mode

AMPSEL

AMPCAL

Amplifier OFF

Amplifier ON

Offset Calibration

AN1830 데이터시트(PDF) 7 Page - STMicroelectronics