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ISL26134AVZ-T7A Arkusz danych(PDF) 1 Page - Intersil Corporation |
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ISL26134AVZ-T7A Arkusz danych(HTML) 1 Page - Intersil Corporation |
1 / 23 page 1 Low-Noise 24-bit Delta Sigma ADC ISL26132, ISL26134 The ISL26132 and ISL26134 are complete analog front ends for high resolution measurement applications. These 24-bit Delta-Sigma Analog-to-Digital Converters include a very low-noise amplifier and are available as either two or four differential multiplexer inputs. The devices offer the same pinout as the ADS1232 and ADS1234 devices and are functionally compatible with these devices. The ISL26132 and ISL26134 offer improved noise performance at 10Sps and 80Sps conversion rates. The on-chip low-noise programmable-gain amplifier provides gains of 1x/2x/64x/128x. The 128x gain setting provides an input range of ±9.766mVFS when using a 2.5V reference. The high input impedance allows direct connection of sensors such as load cell bridges to ensure the specified measurement accuracy without additional circuitry. The inputs accept signals 100mV outside the supply rails when the device is set for unity gain. The Delta-Sigma ADC features a third order modulator providing up to 21.6-bit noise-free performance. The device can be operated from an external clock source, crystal (4.9152MHz typical), or the on-chip oscillator. The two channel ISL26132 is available in a 24 Ld TSSOP package and the four channel ISL26134 is available in a 28 Ld TSSOP package. Both are specified for operation over the automotive temperature range (-40°C to +105°C). Features • Up to 21.6 Noise-free bits. • Low Noise Amplifier with Gains of 1x/2x/64x/128x • RMS noise: 10.2nV @ 10Sps (PGA = 128x) • Linearity Error: 0.0002% FS • Simultaneous rejection of 50Hz and 60Hz (@ 10Sps) • Two (ISL26132) or four (ISL26134) channel differential input multiplexer • On-chip temperature sensor (ISL26132) • Automatic clock source detection • Simple interface to read conversions • +5V Analog, +5 to +2.7V Digital Supplies • Pb-Free (RoHS Compliant) • TSSOP packages: ISL26132, 24 pin; ISL26134, 28 pin Applications •Weigh Scales • Temperature Monitors and Controls • Industrial Process Control • Pressure Sensors ADC PGA 1x/2x/64x/ 128x INTERNAL CLOCK SDO/RDY SCLK DVDD AVDD DGND AGND XTALIN/CLOCK VREF+ EXTERNAL OSCILLATOR XTALOUT VREF- A0 A1/TEMP AIN1+ AIN1- AIN2+ AIN2- AIN3+ AIN3- AIN4+ AIN4- INPUT MULTIPLEXER ISL26134 Only CAP CAP GAIN1 GAIN0 PWDN SPEED DGND DGND NOTE for A1/TEMP pin: Functions as A1 on ISL26134; Functions as TEMP on ISL26132 FIGURE 1. BLOCK DIAGRAM September 9, 2011 FN6954.1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. |
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