SIGNAL CONVERSION & MEASUREMENT WORKBENCH·12-BIT SAR

ADC — Analog-to-Digital Converter

RUNNINGDirectory

Learning Guide

Learning Objectives

Distinguish between continuous analog signals and quantized digital representations.

Understand ADC resolution N bits (2^N digital levels).

Calculate Least Significant Bit (LSB) voltage step size V_LSB = Vref / (2^N - 1).

Compute raw ADC values using ADC_raw = round((Vin / Vref) * (2^N - 1)).

Experiment Procedure

Set Reference Voltage Vref = 3.3V and Resolution = 12-bit (4,096 levels).
Move the Potentiometer slider to Vin = 1.65V (exactly 50% of Vref).
Verify that raw ADC output evaluates to round((1.65 / 3.3) * 4095) = 2048.
Change resolution to 8-bit and observe how the raw output scales down to 128.

Key TakeawayADC raw integers represent the ratio of input voltage Vin relative to Vref scaled by resolution 2^N - 1.

Laboratory Challenges & Worksheet

1 / 3

LVL 1 · BEGINNER

Attempts: 0100 PTS

Challenge 1: Target Raw ADC Conversion Count

Adjust the potentiometer input voltage Vin to reach a raw digital ADC count of 2048 (±10 counts) on 12-bit resolution with Vref = 3.3V.

Engineering Requirements

›Set ADC Resolution to 12-bit (0–4095 scale)

›Set Reference Voltage Vref to 3.3V

›Adjust Potentiometer input voltage Vin to ~1.65V to reach 2048 counts

Hints (0 / 3)

AI Contextual Assistant

GEMINI 2.5

Educational Guidance: Suggestions assist conceptual learning. State validation is evaluated by the deterministic simulation kernel.

Analog Signal Conversion

Voltmeter & Digital Conversion Pipeline

ADC1 CH0

POTENTIOMETER (Vin)0.00 V

INPUT VOLTMETER0.00 V

0V1.6V3.3V

Scale: 0.00V — 3.30V · 0.0% FS

ADC CONVERSION FORMULA12-bit

Formula: ADC_raw = round( (Vin / Vref) × (2^N − 1) )

Subst.: round( (0.00 / 3.3) × 4095 )

Result: ADC_raw = 0 / 4095 (0.0%)

DEC0

HEX0x0000

BIN0b000000000000

LSB: 0.806 mVQ-Error: ±0.00%

Digital Output

0counts

Max Count

4095counts

LSB Size

0.81mV

ADC Configuration

Channel: ADC1_IN0

Channel

ADC1_IN0

Vin

0.00V

Vref

3.3V

Resolution (N)

12-bit

Max Code

4095

Reference Voltage (Vref)

ADC Resolution (N-bit)

Telemetry & Diagnostic Console0 frames

› SYSTEM READY — AWAITING HARDWARE PERIPHERAL EVENTS