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™).