12-Bit 3.3kSPS 4-Ch Delta-Sigma ADC With PGA, Oscillator, VREF, Temp Sensor, and SPI - ADS1018

ADS1018 (ACTIVE)

12-Bit 3.3kSPS 4-Ch Delta-Sigma ADC With PGA, Oscillator, VREF, Temp Sensor, and SPI

 

Description

The ADS1018 is a precision, low-power, 12-bit, noise-free, 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 power-supply 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 cold-junction compensation for thermocouples.

The ADS1018 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™).

Features

  • 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

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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
Features
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Architecture
Operating Temperature Range (C)
Pin/Package
Reference Mode
ADS1018 ADS1115 ADS1118
12    16    16   
3300    860    860   
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    I2C    SPI   
Oscillator
PGA
Temp Sensor   
Comparator
Oscillator
PGA   
Oscillator
PGA
Temp Sensor   
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 ADS1018

Version Part Number Definition
Automotive ADS1018-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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