ISL26132: Low-Noise 24-bit Delta Sigma ADC

The ISL26132 and ISL26134 are complete analog front endsfor high resolution measurement applications. These 24-bitDelta-Sigma Analog-to-Digital Converters include a verylow-noise amplifier and are available as either two or fourdifferential multiplexer inputs. The devices offer the samepinout as the ADS1232 and ADS1234 devices and arefunctionally compatible with these devices. The ISL26132 andISL26134 offer improved noise performance at 10Sps and80Sps conversion rates.

The on-chip low-noise programmable-gain amplifier providesgains of 1x/2x/64x/128x. The 128x gain setting provides aninput range of ±9.766mVFS when using a 2.5V reference. Thehigh input impedance allows direct connection of sensors, suchas load cell bridges to ensure the specified measurementaccuracy without additional circuitry. The inputs accept signals100mV outside the supply rails when the device is set for unitygain.

The Delta-Sigma ADC features a third order modulatorproviding up to 21.6-bit noise-free performance. The devicecan be operated from an external clock source, crystal(4.9152MHz typical), or the on-chip oscillator.

The two channel ISL26132 is available in a 24 Ld TSSOPpackage and the four channel ISL26134 is available in a 28 LdTSSOP package. Both are specified for operation over theautomotive temperature range (-40°C to +105°C).

Key Features
  • Up to 21.6 Noise-free bits
  • Low noise amplifier with gains of 1x/2x/64x/128x
  • RMS noise: 10.6nV @ 10Sps (PGA = 128x)
  • Linearity error: 0.0002% FS
  • Simultaneous rejection of 50Hz and 60Hz (@ 10Sps)
  • Two (ISL26132) or four (ISL26134) channel differentialinput multiplexer
  • On-chip temperature sensor (ISL26132)
  • Automatic clock source detection
  • Simple interface to read conversions
  • +5V Analog, +5 to +2.7V digital supplies
  • Pb-Free (RoHS compliant)
  • TSSOP packages: ISL26132, 24 pin; ISL26134, 28 pin
Applications
  • Weigh scales
  • Temperature monitors and controls
  • Industrial process control
  • Pressure sensors
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN9705: A Theoretical View of Coherent SamplingPDF13 Nov 201425 KB
AN9675: Coherent and Windowed Sampling with A/D ConvertersPDF13 Nov 2014160 KB
AN002: Principles of Data Acquisition and ConversionPDF13 Nov 2014257 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
ISL26132, ISL26134 DatasheetPDF20 Nov 2014734 KB
Software
TitleTypeUpdatedSizeOther Languages
ISL261xxAV28EV1Z Software Installer v3.0EXE07 Oct 201428.5 MB
User Guides
TitleTypeUpdatedSizeOther Languages
ISL26134AV28EV1Z User GuidePDF20 Nov 20141.24 MB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
ISL26132AVZ24 Ld TSSOP0.09242260RoHS
ISL26132AVZ-T24 Ld TSSOP T+R0.09242260RoHS
ISL26132AVZ-T7A24 Ld TSSOP T+R0.09242260RoHS
ISL26134AV28EV1ZN/ARoHS
ISLTHERMO-STKEV2ZN/ARoHS
ISL26132, ISL26134 Datasheet 20 Nov 2014
Atmel DAQ on a Stick Software ISL26132
ISLTHERMO-STKEV2Z User Guide ISL21010CFH325
说明书:DAQ on a Stick Thermocouple with AT90USB162 ISL26132
说明书:桥传感器前端解决方案Pressure & Strain Gauge WIRELESS-STRAIN-GAUGE
24 Ld TSSOP ICL3207E
ISL26134
AN9705: A Theoretical View of Coherent Sampling 13 Nov 2014
AN9675: Coherent and Windowed Sampling with A/D Converters 13 Nov 2014
AN002: Principles of Data Acquisition and Conversion 13 Nov 2014
ISL261xxAV28EV1Z Software Installer v3.0 07 Oct 2014
ISL26134AV28EV1Z User Guide 20 Nov 2014