1 Features
1• Ultrasmall X2QFN Package
2 mm × 1.5 mm × 0.4 mm
• 12-Bit Noise-Free Resolution
• 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: 128 SPS to 3300 SPS
• Single-Cycle Settling
• Internal Low-Drift Voltage Reference
• Internal Temperature Sensor:
2°C (max) Error
• Internal Oscillator
• Internal PGA
• Four Single-Ended or Two Differential Inputs
• Specified Temperature: –40°C to +125°C

2 Applications
• Temperature Measurement:
– Thermocouple Measurement
– Cold-Junction Compensation
– Thermistor Measurement
• Portable Instrumentation
• Factory Automation and Process Controls

3 Description
The ADS1018 is a precision, low-power, 12-bit, noisefree,
analog-to-digital converter (ADC) that provides
all features necessary to measure the most common
sensor signals in an ultrasmall, leadless, X2QFN-10
or VSSOP-10 package. The ADS1018 integrates a
programmable gain amplifier (PGA), voltage
reference, oscillator and high-accuracy temperature
sensor. These features, along with a wide powersupply
range from 2 V to 5.5 V, make the ADS1018
ideally suited for power- and space-constrained,
sensor-measurement applications.
The ADS1018 performs conversions at data rates up
to 3300 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
measurement of two differential or four single-ended
inputs. The high-accuracy temperature sensor is used
for system-level temperature monitoring, or coldjunction
compensation for thermocouples.
The ADS1018 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™).