ADS1018 12-bit 3.3-kSPS 4-ch delta-sigma ADC with PGA, oscillator, VREF, temp sensor and SPI | TI.com

ADS1018
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12-bit 3.3-kSPS 4-ch delta-sigma ADC with PGA, oscillator, VREF, temp sensor and SPI

 

Automotive AEC-Q100 Grade 1 qualified version available, see ADS1018-Q1.

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

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Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) INL (Max) (+/-LSB) Rating
ADS1018 Order now 12     3.3     4     SPI     -40 to 125     VSSOP | 10
X2QFN | 10    
1.15 | 1ku     0.3     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)
10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)    
Delta-Sigma     Differential
Single-Ended    
Multiplexed     Int     Oscillator
PGA
Temp Sensor
Small Size    
5.5     0     2     5.5     2     5.5     0.5     Catalog    
ADC128D818 Order now 12     0.082     8     I2C     -40 to 125     TSSOP | 16     1.95 | 1ku     2     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Pseudo-Differential
Single-Ended    
Multiplexed     Ext
Int    
Oscillator
Temp Sensor    
5.5     0     3     5.5     3     5.5     1     Catalog    
ADS1013 Order now 12     3.3     1     I2C     -40 to 125     VSSOP | 10
X2QFN | 10    
0.95 | 1ku     0.3     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)
10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)    
Delta-Sigma     Differential
Single-Ended    
    Int     Oscillator
Small Size    
5.5     0     2     5.5     2     5.5     0.5     Catalog    
ADS1014 Order now 12     3.3     1     I2C     -40 to 125     VSSOP | 10
X2QFN | 10    
1.05 | 1ku     0.3     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)
10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)    
Delta-Sigma     Differential
Single-Ended    
    Int     Comparator
Oscillator
PGA
Small Size    
5.5     0     2     5.5     2