DATASHEET ISL26102, ISL26104 FN7608 Rev 0.00 Low-Noise 24-bit Delta Sigma ADC October 12, 2012 The ISL26102 and ISL26104 provide a low-noise Features programmable gain amplifier along with a 24-bit Delta-Sigma Programmable gain amplifier with gains of 1 to 128 Analog-to-Digital Converter with two channel (ISL26102) or four channel (ISL26104) differential, multiplexed inputs. The Low noise: 7nV/Hz PGA = 128 devices feature exceptional noise performance for conversion Linearity error: 0.0002% FS rates ranging from 2.5Sps to 4kSps. Output word rates up to 4kSps The on-chip low-noise programmable-gain amplifier provides gains ranging from 1 to 128, which supports 19.5mVFS from Low-side switch for load cell power management a 5V reference. The high input impedance allows direct +5V analog and +2.7V to +5V digital supplies connection of sensors such as load cell bridges to ensure the specified measurement accuracy without additional circuitry. ISL26102 in 24 Ld TSSOP ISL26104 in 28 Ld TSSOP The Delta-Sigma ADC features a 3rd-order modulator providing up to 21.5 bit noise-free performance (10Sps), with ESD 7.5kV - HBM user-selectable word rates. The converter can be operated from an external clock source, an external crystal (typically Applications 4.9152MHz), or the on-chip oscillator. Weigh scales The ISL26102 and ISL26104 offer a simple-to-use serial Temperature monitors and controls interface. Load safety systems The ISL26102 and ISL26104 are available in a Thin Shrink Industrial process control Small Outline Package (TSSOP). The devices are specified for operation over the automotive temperature range (-40C to Pressure sensors +105C). Related Literature AN1704, Precision Signal Path Data Acquisition System CAP AVDD DVDD DVDD ON-CHIP XTALIN/ TEMP CLOCK INTERNAL EXTERNAL SENSOR XTALOUT OSCILLATOR CLOCK AIN1+ CS AIN1- AIN2+ SDO/RDY PGA AIN2- INPUT 1, 2, 4, 8,16, ADC MULTIPLEXER 32, 64, 128 AIN3+ SDI AIN3- ISL26104 ONLY AIN4+ SCLK AIN4- PWDN LSPS AGND CAP DGND DGND VREF+ VREF- DGND DGND FIGURE 1. BLOCK DIAGRAM FN7608 Rev 0.00 Page 1 of 21 October 12, 2012ISL26102, ISL26104 Ordering Information PART NUMBER PART TEMP RANGE PACKAGE PKG. (Notes 1, 2, 3) MARKING DESCRIPTION (C) (Pb-free) DWG. ISL26102AVZ 26102 AVZ 2 Channel ADC -40 to +105 24 Ld TSSOP M24.173 ISL26104AVZ 26104 AVZ 4 Channel ADC -40 to +105 28 Ld TSSOP M28.173 ISL26104AV28EV1Z Evaluation Board 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 Pbfree 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 ISL26102, ISL26104. For more information on MSL please see techbrief TB363. Pin Configurations ISL26102 ISL26104 (24 LD TSSOP) (28 LD TSSOP) TOP VIEW TOP VIEW DVDD 1 28 SDO/RDY DVDD 1 24 SDO/RDY DGND 2 27 SCLK DGND 2 23 SCLK XTALIN/CLOCK 26 XTALIN/CLOCK 3 22 PDWN 3 PDWN XTALOUT 25 21 SDI 4 SDI XTALOUT 4 DGND 20 CS 5 24 CS DGND 5 DVDD LSPS 6 23 LSPS DVDD 6 19 ISL26102 DGND 7 22 AVDD DGND 7 18 AVDD ISL26104 AGND AGND DGND 8 21 DGND 8 17 CAP 9 20 VREF+ 9 16 VREF+ CAP CAP 10 19 VREF- 10 15 VREF- CAP 18 AIN2+ 11 14 AIN2+ AIN1+ 11 AIN1+ AIN1- 12 17 12 13 AIN2- AIN1- AIN2- AIN4+ AIN3+ 13 16 AIN3- 14 15 AIN4- FN7608 Rev 0.00 Page 2 of 21 October 12, 2012