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CS5523-ASZ Scheda tecnica(PDF) 1 Page - Cirrus Logic |
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CS5523-ASZ Scheda tecnica(HTML) 1 Page - Cirrus Logic |
1 / 56 page Copyright Cirrus Logic, Inc. 2009 (All Rights Reserved) http://www.cirrus.com CS5521/22/23/24/28 16-bit or 24-bit, 2/4/8-channel ADCs with PGIA Features Low Input Current (100 pA), Chopper- stabilized Instrumentation Amplifier Scalable Input Span (Bipolar/Unipolar) - 2.5V VREF: 25 mV, 55 mV, 100 mV, 1 V, 2.5 V, 5 V - External: 10 V, 100 V Wide VREF Input Range (+1 to +5 V) Fourth Order Delta-Sigma A/D Converter Easy to Use Three-wire Serial Interface Port - Programmable/Auto Channel Sequencer with Conversion Data FIFO - Accessible Calibration Registers per Channel - Compatible with SPI™ and Microwire™ System and Self Calibration Eight Selectable Word Rates - Up to 617 Sps (XIN = 200 kHz) - Single Conversion Settling - 50/60 Hz ±3 Hz Simultaneous Rejection Single +5 V Power Supply Operation - Charge Pump Drive for Negative Supply - +3 to +5 V Digital Supply Operation Low Power Consumption: 6.0 mW General Description The CS5521/22/23/24/28 are highly integrated ΔΣ ana- log-to-digital converters (ADCs) which use charge- balance techniques to achieve 16-bit (CS5521/23) and 24-bit (CS5522/24/28) performance. The ADCs come as either two-channel (CS5521/22), four-channel (CS5523/24), or eight-channel (CS5528) devices and include a low-input-current, chopper-stabilized instru- mentation amplifier. To permit selectable input spans of 25 mV, 55 mV, 100 mV, 1 V, 2.5 V, and 5 V, the ADCs include a PGA (programmable gain amplifier). To ac- commodate ground-based thermocouple applications, the devices include a charge pump drive which provides a negative bias voltage to the on-chip amplifiers. These devices also include a fourth-order ΔΣ modulator followed by a digital filter which provides eight selectable output word rates. The digital filters are designed to settle to full accuracy within one conversion cycle and when operated at word rates below 30 Sps, they reject both 50 Hz and 60 Hz interference. These single-supply products are ideal solutions for measuring isolated and non-isolated, low-level signals in process control applications. ORDERING INFORMATION See page 53. VA+ AGND VREF+ VREF- VD+ DGND XIN XOUT NBV Latch Differential Digital Filter 4th Order ΔΣ Modulator Clock Gen. MUX AIN2+ X1 X1 X1 CS5524 Shown AIN2- AIN1+ AIN1- AIN4+ AIN4- AIN3+ AIN3- A0 A1 CPD Controller, Setup Registers, & Data FIFO & Calibration Registers Channel Scan Logic Serial Port Interface + X20 SDO SDI SCLK CS JUL ‘09 DS317F8 |
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