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.