DATASHEET ISL26132, ISL26134 FN6954 Rev 3.00 Low-Noise 24-bit Delta Sigma ADC November 20, 2014 The ISL26132 and ISL26134 are complete analog front ends Features for high resolution measurement applications. These 24-bit Up to 21.6 Noise-free bits Delta-Sigma Analog-to-Digital Converters include a very low-noise amplifier and are available as either two or four Low noise amplifier with gains of 1x/2x/64x/128x differential multiplexer inputs. The devices offer the same RMS noise: 10.6nV 10Sps (PGA = 128x) pinout as the ADS1232 and ADS1234 devices and are Linearity error: 0.0002% FS functionally compatible with these devices. The ISL26132 and ISL26134 offer improved noise performance at 10Sps and Simultaneous rejection of 50Hz and 60Hz ( 10Sps) 80Sps conversion rates. Two (ISL26132) or four (ISL26134) channel differential The on-chip low-noise programmable-gain amplifier provides input multiplexer gains of 1x/2x/64x/128x. The 128x gain setting provides an On-chip temperature sensor (ISL26132) input range of 9.766mVFS when using a 2.5V reference. The Automatic clock source detection high input impedance allows direct connection of sensors, such as load cell bridges to ensure the specified measurement Simple interface to read conversions accuracy without additional circuitry. The inputs accept signals +5V Analog, +5 to +2.7V digital supplies 100mV outside the supply rails when the device is set for unity Pb-Free (RoHS compliant) gain. TSSOP packages: ISL26132, 24 pin ISL26134, 28 pin The Delta-Sigma ADC features a third order modulator providing up to 21.6-bit noise-free performance. The device Applications can be operated from an external clock source, crystal (4.9152MHz typical), or the on-chip oscillator. Weigh scales Temperature monitors and controls The two channel ISL26132 is available in a 24 Ld TSSOP package and the four channel ISL26134 is available in a 28 Ld Industrial process control TSSOP package. Both are specified for operation over the Pressure sensors automotive temperature range (-40C to +105C). CAP AVDD DVDD XTALIN/CLOCK INTERNAL EXTERNAL CLOCK OSCILLATOR XTALOUT AIN1+ AIN1- SDO/RDY AIN2+ AIN2- PGA INPUT 1x/2x/64x/ MULTIPLEXER ADC 128x AIN3+ SCLK AIN3- ISL26134 Only AIN4+ AIN4- PWDN SPEED A0 A1/TEMP AGND GAIN0 GAIN1 CAP DGND VREF+ VREF- DGND DGND NOTE for A1/TEMP pin: Functions as A1 on ISL26134 Functions as TEMP on ISL26132 FIGURE 1. BLOCK DIAGRAM FN6954 Rev 3.00 Page 1 of 23 November 20, 2014ISL26132, ISL26134 Ordering Information PART NUMBER TEMPERATURE RANGE PACKAGE PKG. (Notes 2, 3) PART MARKING (C) (Pb-free) DWG. ISL26132AVZ 26132 AVZ -40 to +105 24 Ld TSSOP M24.173 ISL26132AVZ-T (Note 1) 26132 AVZ -40 to +105 24 Ld TSSOP (Tape & Reel) M24.173 ISL26132AVZ-T7A (Note 1) 26132 AVZ -40 to +105 24 Ld TSSOP (Tape & Reel) M24.173 ISL26134AVZ 26134 AVZ -40 to +105 28 Ld TSSOP M28.173 ISL26134AVZ-T (Note 1) 26134 AVZ -40 to +105 28 Ld TSSOP (Tape & Reel) M28.173 ISL26134AVZ-T7A (Note 1) 26134 AVZ -40 to +105 28 Ld TSSOP (Tape & Reel) M28.173 ISL26134AV28EV1Z Evaluation Board NOTES: 1. 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 ISL26132, ISL26134. For more information on MSL please see techbrief TB363. TABLE 1. KEY DIFFERENCES OF PARTS PART NUMBER NUMBER OF CHANNELS ON-CHIP TEMPERATURE SENSOR NUMBER OF PINS ISL26132 2 YES 24 ISL26134 4 NO 28 Pin Configurations ISL26132 ISL26134 (24 LD TSSOP) (28 LD TSSOP) TOP VIEW TOP VIEW DVDD 1 24 SDO/RDY DVDD 1 28 SDO/RDY DGND 2 23 SCLK DGND 2 27 SCLK XTALIN/CLOCK 3 22 PDWN XTALIN/CLOCK 3 26 PDWN XTALOUT 4 21 SPEED XTALOUT 4 25 SPEED DGND 5 20 GAIN1 DGND 5 24 GAIN1 DGND 6 19 GAIN0 DGND 6 23 GAIN0 TEMP 7 18 AVDD A1 7 22 AVDD A0 8 17 AGND A0 8 21 AGND CAP 9 16 VREF+ CAP 9 20 VREF+ CAP 10 15 VREF- CAP 10 19 VREF- AIN1+ 11 14 AIN2+ AIN1+ 11 18 AIN2+ AIN1- 12 13 AIN2- AIN1- 12 17 AIN2- AIN3+ 13 16 AIN4+ AIN3- 14 15 AIN4- FN6954 Rev 3.00 Page 2 of 23 November 20, 2014