1 Features

1• Ultrasmall X2QFN Package:

2 mm × 1.5 mm × 0.4 mm

• Wide Supply Range: 2 V to 5.5 V

• Low Current Consumption:

– Continuous Mode: Only 150 μA

– Single-Shot Mode: Automatic Power Down

• Programmable Data Rate:

8 SPS to 860 SPS

• Single-Cycle Settling

• Internal Low-Drift Voltage Reference

• Internal Temperature Sensor:

0.5°C (Maximum) Error: 0°C to 70°C

• Internal Oscillator

• Internal PGA

• Four Single-Ended or Two Differential Inputs

2 Applications

• Temperature Measurement:

– Thermocouple Measurement

– Cold-Junction Compensation

– Thermistor Measurement

• Portable Instrumentation

• Factory Automation and Process Controls

3 Description

The ADS1118 is a precision, low power, 16-bit

analog-to-digital converter (ADC) that provides all

features necessary to measure the most common

sensor signals in an ultra-small, leadless X2QFN-10

package or a VSSOP-10 package. The ADS1118

integrates a programmable gain amplifier (PGA),

voltage reference, oscillator and high-accuracy

temperature sensor. These features, along with a

wide power supply range from 2 V to 5.5 V, make the

ADS1118 ideally suited for power- and spaceconstrained,

sensor-measurement applications.

The ADS1118 can perform conversions at data rates

up to 860 samples per second (SPS). The PGA offers

input ranges from ±256 mV to ±6.144 V, allowing

both large and small signals to be measured with

high resolution. An input multiplexer (MUX) allows to

measure two differential or four single-ended inputs.

The high-accuracy temperature sensor can be used

for system-level temperature monitoring or coldjunction

compensation for thermocouples.

The ADS1118 operates either in continuousconversion

mode, or in a single-shot mode that

automatically powers down after a conversion.

Single-shot mode significantly reduces current

consumption during idle periods. Data are transferred

through a serial peripheral interface (SPI™). The

ADS1118 is specified from –40°C to +125°C.