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CS5523-AS Datasheet(PDF) 1 Page - Cirrus Logic |
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CS5523-AS Datasheet(HTML) 1 Page - Cirrus Logic |
1 / 56 page 1 Copyright © Cirrus Logic, Inc. 2000 (All Rights Reserved) P.O. Box 17847, Austin, Texas 78760 (512) 445 7222 FAX: (512) 445 7581 http://www.cirrus.com CS5521/22/23/24/28 16-Bit or 24-Bit, 2/4/8-Channel ADCs with PGIA Features l Low Input Current (100 pA), Chopper Stabilized Instrumentation Amplifier l Scalable Input Span (Bipolar/Unipolar) - 2.5V VREF: 25 mV, 55 mV, 100 mV, 1 V, 2.5 V, 5V - External: 10 V, 100 V l Wide VREF Input Range (+1 to +5 V) l Fourth Order Delta-Sigma A/D Converter l Easy to Use Three-wire Serial Interface Port - Programmable/Auto Channel Sequencer with Conversion Data FIFO - Accessible Calibration Registers per Channel - Compatible with SPITM and MicrowireTM l System and Self-Calibration l Eight Selectable Word Rates - Up to 617 Hz (XIN = 200 kHz) - Single Conversion Settling - 50/60 Hz ±3 Hz Simultaneous Rejection l Single +5 V Power Supply Operation - Charge Pump Drive for Negative Supply - +3 to +5 V Digital Supply Operation l Low Power Consumption: 5.5 mW General Description The CS5521/22/23/24/28 are highly integrated ∆Σ 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 pro- vides a negative bias voltage to the on-chip amplifiers. These devices also include a fourth order ∆Σ 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 Hz, they reject both 50 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 51. Programmable Gain VA+ AGND VREF+ VREF- VD+ DGND XIN XOUT SDO SDI NBV Latch Differential Digital Filter Calibration Register Control Register Output Register 4th Order ∆Σ Modulator Calibration Memory Calibration µC Clock Gen. SCLK CS MUX AIN2+ + X20 X1 X1 X1 CS5524 Shown AIN2- AIN1+ AIN1- AIN4+ AIN4- AIN3+ AIN3- A0 A1 CPD Data FIFO MAY ‘00 DS317F2 |
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