DATASHEET ISL26310, ISL26311, ISL26312, ISL26313, ISL26314, ISL26315, ISL26319 FN7549 12-bit, 125kSPS Low-power ADCs with Single-ended and Differential Inputs and Multiple Rev 3.00 Input Channels August 18, 2015 The ISL26310, ISL26311, ISL26312, ISL26313, ISL26314, Features ISL26315 and ISL26319 family of sampling SAR-type ADCs Pin-compatible family allows easy design upgrades feature excellent linearity over supply and temperature variations, and offer versions with 1-, 2-, 4- and 8-channel single-ended Excellent differential non-linearity (0.7LSB max) inputs, and 1-, 2- and 4-channel differential inputs. A proprietary Low THD: -86dB (typ) input multiplexer and combination buffer amplifier reduces the Simple SPI-compatible serial digital interface input drive requirements, resulting in lower cost and reduced board space. Specified measurement accuracy is maintained Low 2.2mA operating current with input signals up to VDD. Power-down current between conversions 8A (typ) Members of the ISL26310, ISL26311, ISL26312, ISL26313, +5.25V to +2.7V supply ISL26314, ISL26315 and ISL26319 family of Low-Power ADCs Excellent ESD survivability: 5kV HBM, 350V MM, 2kV CDM offer pinout intercompatibility, differing only in the analog inputs, to support quick replication of proven layouts across multiple Applications design platforms. Industrial process control The serial digital interface is SPI compatible and is easily interfaced to popular FPGAs and microcontrollers. Power Energy measurement consumption is limited to 11mW at a sampling rate of 125kSPS, Multichannel data acquisition systems and an operating current of just 8A typical between conversions, Pressure sensors when configured for Auto Power-down mode. Flow controllers The ISL26310, ISL26311, ISL26312, ISL26313, ISL26314, ISL26315, ISL26319 feature up to 5kV Human Body Model ESD survivability and are available in the popular SOIC and TSSOP packages. Performance is specified for operation over the full industrial temperature range (-40C to +125C). VDD VREF BUFFER CNV ANALOG INPUTS SCLK DIFFERENTIAL/ MUX ADC SPI SINGLE-ENDED SDO SDI OSC POR GND FIGURE 1. FUNCTIONAL BLOCK DIAGRAM FN7549 Rev 3.00 Page 1 of 23 August 18, 2015ISL26310, ISL26311, ISL26312, ISL26313, ISL26314, ISL26315, ISL26319 Application Block Diagram 2 I C Bus RS-232 RTC ANALOG SIGNAL INPUT MODULEs MUX and ADC Pressure/Strain Gage Sensor RS-485 VREF RS-485 Master Precision Amps C C M ADC Gain Active RTC U Amplifiers Filters DCP X +V +V VREF Precision Precision Amps Amps POWER -V -V Voltage V Supervisor & Temperature Sensor Sequencers LDOs VREF DCP System Core & Power Thermistor I/O Power +V Switching +V Active Regulator Switching Precision Filters LDO V Amps Precision Switching Regulators Amps Controller -V -V Thermocouple Buffer, Filters, +V Span Drivers +V Actuators Active Precision +V Motors +V +V Filters High Voltage Input Rail ~24V Amps Control loops M Precision Precision Amps Precision U -V DAC Amps Amps X -V ISO-Thermal -V -V Block VREF Single Ended -V Controller ANALOG SIGNAL OUTPUT MODULE Flow Sensor Loop Supply Gain Active Amplifiers Filters Isolator +V +V Differential Pressure Vin Iout Precision Precision Transducer 4 -20mA Amps w/ Amps Isolated Power Extractor -V -V Pin-Compatible Family RESOLUTION SPEED ANALOG INPUT MODEL (Bits) (kHz) INPUT CHANNELS ISL26310 12 125 Differential 1 ISL26311 12 125 Single-Ended 1 ISL26312 12 125 Differential 2 ISL26313 12 125 Single-Ended 2 ISL26314 12 125 Differential 4 ISL26315 12 125 Single-Ended 4 ISL26319 12 125 Single-Ended 8 ISL26320 12 250 Differential 1 ISL26321 12 250 Single-Ended 1 ISL26322 12 250 Differential 2 ISL26323 12 250 Single-Ended 2 ISL26324 12 250 Differential 4 ISL26325 12 250 Single-Ended 4 ISL26329 12 250 Single-Ended 8 FN7549 Rev 3.00 Page 2 of 23 August 18, 2015
