DATASHEET ISL26712, ISL26710, ISL26708 FN7999 Rev 3.00 12-Bit, 10-Bit and 8-Bit, 1MSPS SAR ADCs September 5, 2012 The ISL26712, ISL26710, ISL26708 are 12-bit, 10-bit and 8-bit, Features 1MSPS sampling SAR-type ADCs featuring excellent linearity Differential Input over supply and temperature variations. The robust, fully-differential input offers high impedance to minimize errors Simple SPI-compatible Serial Digital Interface due to leakage currents, and the specified measurement Guaranteed No Missing Codes accuracy is maintained with input signals up to the supply rails. 1MHz Sampling Rate The reference accepts inputs from 0.1V to 2.2V for 3V 3V or 5V Operation operation and 0.1V to 3.5V for 5V operation, providing design flexibility in a wide variety of applications. The Low Operating Current ISL26712/10/08 also features up to 8kV Human Body Model - 1.25mA at 1MSPS with 3V Supplies ESD survivability. - 1.70mA at 1MSPS with 5V Supplies The serial digital interface is SPI compatible and is easily Power-down Current between Conversions: 1A interfaced to popular FPGAs and microcontrollers. Power dissipation is 8.5mW at a sampling rate of 1MSPS, and just Excellent Differential Non-Linearity 5W between conversions utilizing Auto Power-Down mode Low THD: -83dB (typ) (with a 5V supply), making the ISL26712/10/08 excellent Pb-Free (RoHS Compliant) solutions for remote industrial sensors and battery-powered instruments. Available in TDFN Package (3x3mm) Available in SOT-23 Package The ISL26712/10/08 are available in an 8 Ld TDFN or an SOT- 23 package, and are specified for operation over the Industrial Applications temperature range (40C to +85C). Remote Data Acquisition Battery Operated Systems Industrial Process Control Energy Measurement Data Acquisition Systems Pressure Sensors Flow Controllers 1.0 0.8 VREF VDD 0.6 0.4 0.2 AIN+ SCLK 0.0 SAR SERIAL SDATA LOGIC INTERFACE -0.2 AIN CS -0.4 VREF -0.6 -0.8 GND -1.0 0 1024 2048 3072 4096 CODE FIGURE 1. BLOCK DIAGRAM FIGURE 2. ISL26712 DIFFERENTIAL LINEARITY ERROR vs CODE FN7999 Rev 3.00 Page 1 of 21 September 5, 2012 DAC DAC DNL (LSB)ISL26712, ISL26710, ISL26708 Typical Connection Diagram +3V/5V VREF SUPPLY + + 0.1F 10F VREF VDD REF AIN+ SCLK P-P AIN SDATA P/C REF P-P GND CS SERIAL INTERFACE Pin Configurations Pin Description ISL26712/10/08 ISL26712/10/08 (8 LD TDFN) TOP VIEW PIN PIN PIN NUMBER NUMBER VREF 1 8 V NAME (TDFN) (SOT-23) DESCRIPTION DD AIN+ 2 7 SCLK VDD 8 1 Supply voltage, +2.7V to 5.25V. AIN- 3 6 SDATA SCLK 7 2 Serial clock input. Controls digital I/O timing and clocks the GND 4 5 CS conversion. SDATA 6 3 Digital conversion output. ISL26712/10/08 CS 5 4 Chip select input. Generally controls the start of a conversion though not (8 LD SOT-23) always the sampling signal. TOP VIEW GND 4 5 Ground V 1 8 VREF DD AIN 3 6 Negative analog input. SCLK 2 7 AIN+ AIN+ 2 7 Positive analog input. SDATA 3 6 AIN- VREF 1 8 Reference voltage. CS 4 5 GND Pin-Compatible Family RESOLUTION PART NUMBER (Bits) ISL26712 12 ISL26710 10 ISL26708 8 FN7999 Rev 3.00 Page 2 of 21 September 5, 2012