DATASHEET ISL267817 FN7877 Rev 2.00 12-Bit Differential Input 200kSPS SAR ADC April 19, 2012 The ISL267817 is a 12-bit, 200kSPS sampling SAR-type ADC Features which features excellent linearity over supply and temperature Drop-In Compatible with ADS7817 (All Performance Grades) variations, and provides a drop-in compatible alternative to all ADS7817 performance grades. The robust, fully-differential Differential Input input offers high impedance to minimize errors due to leakage Simple SPI-compatible Serial Digital Interface currents, and the specified measurement accuracy is Guaranteed No Missing Codes maintained with input signals up to the supply rails. 200kHz Sampling Rate The reference accepts inputs between 0.1V to 2.5V, providing design flexibility in a wide variety of applications. The +4.75V to +5.25V Supply ISL267817 also features up to 8kV Human Body Model ESD Low 2.15mW Operating Power (200kSPS) survivability. Power-down Current between Conversions: 3A The serial digital interface is SPI compatible and is easily Excellent Differential Non-Linearity (1.0LSB max) interfaced to popular FPGAs and microcontrollers. Operating from a 5V supply, power dissipation is 2.15mW at a sampling Low THD: -85dB (typ) rate of 200kSPS, and just 25W between conversions utilizing Pb-Free (RoHS Compliant) the Auto Power-Down mode, making the ISL267817 an Available in SOIC and MSOP Packages excellent solution for remote industrial sensors and battery-powered instruments. It is available in the compact, Applications industry-standard 8 Lead SOIC and MSOP packages and is specified for operation over the industrial temperature range Remote Data Acquisition (-40C to +85C). Battery Operated Systems Industrial Process Control Energy Measurement Data Acquisition Systems Pressure Sensors Flow Controllers 1.00 VREF +VCC 0.75 0.50 0.25 +IN DCLOCK 0.00 SAR SERIAL DOUT LOGIC INTERFACE -0.25 IN CS/SHDN -0.50 VREF -0.75 -1.00 0 512 1024 1536 2048 2560 3072 3584 4096 GND FIGURE 1. BLOCK DIAGRAM FIGURE 2. DIFFERENTIAL LINEARITY ERROR vs CODE FN7877 Rev 2.00 Page 1 of 18 April 19, 2012 DAC DACISL267817 Typical Connection Diagram VREF +5V SUPPLY + + 0.1F 10F VREF +VCC REF +IN DCLOCK P-P IN DOUT P/C REFP-P GND CS/SHDN SERIAL INTERFACE Pin Configuration Pin Descriptions ISL267817 PIN NAME PIN NUMBER DESCRIPTION (8 LD SOIC, MSOP) TOP VIEW VREF 1 Reference Input +IN 2 Non Inverting Input 1 8 +VCC VREF IN 3 Inverting Input 2 7 +IN DCLOCK GND 4 Ground 3 6 IN DOUT CS/SHDN 5 Low = Chip Select, High = Shutdown 4 5 GND CS/SHDN DOUT 6 Serial Output Data DCLOCK 7 Data Clock +VCC 8 Power Supply Ordering Information PART NUMBER PART +VCC RANGE TEMP RANGE PKG. (Notes 1, 2, 3) MARKING (V) (C) PACKAGE DWG. ISL267817IBZ 267817 IBZ 4.75 to 5.25 -40C to +85C 8 Ld SOIC M8.15 ISL267817IUZ 67817 4.75 to 5.25 -40C to +85C 8 Ld MSOP M8.118 NOTES: 1. Add -T* suffix for tape and reel. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for the ISL267817. For more information on MSL please see tech brief TB363. FN7877 Rev 2.00 Page 2 of 18 April 19, 2012