16-Bit, 860SPS, 4-Ch Delta-Sigma ADC w/ PGA, Oscillator, Voltage Reference, Temp Sensor & SPI - ADS1118

ADS1118 (ACTIVE)

16-Bit, 860SPS, 4-Ch Delta-Sigma ADC w/ PGA, Oscillator, Voltage Reference, Temp Sensor & SPI

 

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 space-constrained, 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 cold-junction compensation for thermocouples.

The ADS1118 operates either in continuous-conversion 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.

Features

  • 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
  • APPLICATIONS
    • Temperature Measurement:
      • Thermocouple nMeasurement
      • Cold-Junction Compensation
      • Thermistor Measurement
    • Portable Instrumentation
    • Factory Automation and Process Controls

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Parametrics Compare all products in Precision ADCs (<=10MSPS)

 
Resolution (Bits)
Sample Rate (max) (SPS)
# Input Channels
Input Type
Power Consumption (Typ) (mW)
Input Range (Min) (V)
Input Range (Max) (V)
Interface
Integrated Features
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Architecture
Operating Temperature Range (C)
Pin/Package
Reference Mode
ADS1118 ADS1018 ADS1115
16    12    16   
860SPS    3.3kSPS    860SPS   
4    4    4   
Differential
Single-Ended   
Differential
Single-Ended   
Differential
Single-Ended   
0.3    0.3    0.3   
0    0    0   
5.5    5.5    5.5   
SPI    SPI    I2C   
Oscillator
PGA
Temp Sensor   
Oscillator
PGA
Temp Sensor   
Comparator
Oscillator
PGA   
2    2    2   
5.5    5.5    5.5   
Delta-Sigma    Delta-Sigma    Delta-Sigma   
-40 to 125    -40 to 125    -40 to 125   
10VSSOP
10X2QFN   
10VSSOP
10X2QFN   
10VSSOP
10X2QFN   
Int    Int    Int   

Other qualified versions of ADS1118

Version Part Number Definition
Automotive ADS1118-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

WEBENCH® Designer ADS1118

Sensor AFE Designer
 Thermocouple