AN1812

6 Characteristics of different slope converters

9/34

6

Characteristics of different slope converters

6.1

Single-slope converter

Figure 5.

Single-Slope Converter Circuit Diagram

6.1.1

Timing diagram

Here Vin is directly proportional to the time measured.

Figure 6.

Single-slope converter timing diagram

The major sources of conversion errors are the correction factor for the R*C product and the

input offset voltage.

A single-slope converter requires a dual supply voltage op-amp to be able to measure the

positive and negative voltages.

R

-Vref

Vin

C

Vin

Time