ADS1118 16-Bit ADC Module SPI Communication High Precision Analog to Digital Converter Board

ADS1118 16-bit high precision ADC module with SPI interface. Built-in programmable gain amplifier (PGA), supports single-ended and differential inputs. Up to 860 SPS, onboard temperature sensor. Ideal for precision data acquisition, sensor measurement, industrial automation, instrumentation

ADS1118 16-Bit ADC Module Application features:

◆ Main Chip
ADS1118 16-bit analog-to-digital converter

◆ Resolution
16-bit (maximum)

◆ Communication Interface
SPI (4-wire)

◆ Input Types

Single-ended (4 channels)

Differential (2 channels)

◆ Data Rate
8 SPS – 860 SPS (programmable)

◆ Programmable Gain Amplifier (PGA)
±0.256V / ±0.512V / ±1.024V / ±2.048V / ±4.096V / ±6.144V

Built-in Features

Temperature sensor (±0.5°C accuracy)

Comparator (threshold alarm)

 Supply Voltage
2.0V – 5.5V

Onboard Interfaces

VCC / GND

SCK / MOSI / MISO / CS (SPI)

AIN0 – AIN3 (analog inputs)

Typical Applications

High precision data acquisition

Sensors (pressure/temperature/load cell)

Industrial automation

Portable instrumentation

Battery voltage monitoring

Medical devices

Arduino/Raspberry Pi expansion

Key Advantages

16-bit high precision

Built-in PGA (no external op-amp needed)

Built-in temperature sensor

Low power (0.2mA in continuous mode)

SPI interface for high-speed communication

Why Choose QIXINWEI

Years of experience in the electronics industry. Trusted by global customers.

Massive In-Stock Inventory – Ready to ship promptly

BOM Matching Service – One-stop solution, save time

PCBA Customization – Professional engineering team creates tailor-made solutions based on your needs

Cost-Effective & Efficient – Better channel, better cost

A dedicated team makes your procurement smoother.

Contact us for BOM quotes or PCBA inquiries

FAQ

1. What is the ADS1118 16-Bit ADC Module?
The ADS1118 is a precision, low-power, 16-bit analog-to-digital converter (ADC) module from Texas Instruments. It integrates a programmable gain amplifier (PGA), voltage reference, oscillator, and a high-accuracy temperature sensor. The module communicates via the SPI (Serial Peripheral Interface) and is ideal for high-precision sensor signal measurements, such as thermocouples and thermistors.

2. What are the key specifications of the ADS1118 module?

• Resolution: 16-bit

• Supply Voltage: 2V ~ 5.5V

• Current Consumption: 150μA in continuous mode

• Sampling Rate: Up to 860 samples per second (SPS)

• PGA Input Range: ±256mV to ±6.144V

• Input Channels: 2 differential or 4 single-ended

• Operating Temperature: -40°C ~ +125°C

• Interface: SPI

3. What package does the ADS1118 module use?
The chip itself comes in two ultra-small package options: X2QFN-10 (1.50mm × 2.00mm) and VSSOP-10 (3.00mm × 3.00mm). Common modules integrate the chip with peripheral circuitry on a PCB, typically featuring a 12-pin header (2.54mm pitch) for easy connection to development boards.

4. What applications is the ADS1118 module suitable for?
The ADS1118 is well-suited for temperature measurement (thermocouple measurement, cold-junction compensation, thermistor measurement), portable instrumentation, factory automation and process control, and more. Its high precision and built-in temperature sensor make it ideal for applications requiring temperature-compensated measurements.

5. What development tools support the ADS1118 module?

• Arduino: Use the ADS1118 library (search and install via Arduino IDE Library Manager) to easily read temperature and voltage using methods like getTemperature() and getMilliVolts().

• STM32/GD32, etc. : Use the hardware SPI interface and configure the 16-bit Config Register (controls operating mode, input selection, data rate, full-scale range, etc.).

• General: If no hardware SPI controller is available, GPIO pins can be used to simulate the SPI protocol.

6. What is the operating temperature range of the ADS1118 module?
The ADS1118 has a rated operating temperature range of -40°C ~ +125°C. The automotive-grade ADS1118-Q1 version also supports the -40°C ~ +125°C range.

7. What voltage measurement ranges does the ADS1118 module support?
By configuring the Programmable Gain Amplifier (PGA) , the ADS1118 supports multiple full-scale input ranges: ±256mV, ±512mV, ±1.024V, ±2.048V, ±4.096V, ±6.144V. Note that the analog input voltage must not exceed VDD + 0.3V.

8. What input channel configurations does the ADS1118 module support?
The ADS1118 features an input multiplexer (MUX) that supports two input modes:

• Differential input: 2 channels (measures voltage difference between two pins)

• Single-ended input: 4 channels (each channel measured against ground)

9. What operating modes does the ADS1118 module support?
The ADS1118 supports two operating modes:

• Continuous conversion mode: Performs conversions continuously

• Single-shot mode: Automatically powers down after a conversion, significantly reducing current consumption during idle periods — ideal for battery-powered devices

10. What are the alternative models for the ADS1118 module?

• ADS1018: 12-bit version with faster data rates and lower cost

• ADS1115: Similar functionality but uses I2C interface (instead of SPI)

• ADS1015: 12-bit + I2C interface

• TLA2024: Another 12-bit I2C ADC option