CS5505/06/07/08 Low-Power, 16/20-Bit A/D Converters - Cirrus Logic - #1

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CS5505/6/7/8 ^^GRRUS LOGIC Very LowPower, 16-bit & 20-bit A/D Converters Features • Very Low Power Consumption - Single supply +5 V opération: 1.7 mW - Dual supply ±5 V operation: 3.2 mW • Offers superior performance to VFCs and multi-slope integrating ADCs • Differential Inputs - Single-channel (CS5507/8) and Four-channel (CS5505/6) pseudo-differential versions • Either 5 V or 3.3 V Digital Interface • Linearity Error: - ±0.0015% FS (16-bit CS5505/7) - ±0.0007% FS (20-bit CS5506/8) • Output update rates up to 100 Sps • Flexible Serial Port • Pin-Selectable Unipolar/Bipolar Ranges Descriptiov The CS5505/6/7/8 are a family of low power CMOS A/D converters which are ideal for measuring low-frequency signals representing physical, chemical, and biological processes. The CS 5507/8 have single-channel differential analog and reference inputs while the CS5505/6 have four pseudo-differential analog input channels. The CS5505/7 have a 16-bit output word. The CS5506/8 have a 20-bit output word.The CS5505/6/7/8 sample upon command up to 100 Sps. The on-chip digital filter offers superior line rejection at 50 and 60 Hz when the device is operated from a 32.768 kHz clock (output word rate = 20 Sps). The CS 5505/6/7/8 include on-chip self-calibration cir-cuitry which can be initiated at any time or temperature to ensure minimum offset and full-scale errors. The CS5505/6/7/8 serial port offers two general-purpose modes for the direct interface to shift registers or syn-chronous serial ports of industry-standard microcontrollers. ORDERING INFORMATION See page 30. VA+ VA- VD+ DGND VREFOUT VREF+ VREF- AIN1 + AIN2+ AIN3+ AIN4+ AIN- p£— Voltage Référence 17 18 20 19 2 CS DRDY SCLK SDATA j4_ Differential 4th-Order Digital Delta-Sigma Filter Modulator 23 Ser al Interface Logic 21 1$_ 9 22 10 MUX 2 3 7 M/SLP CAL BP/UP 11 Calibration uC 4 m. 8 Calibration SRAM OSC 1 24 A0 A1 CONV XIN XOUT cs5505 (16-bit) and cs5506 (20-bit) shown CUeRUS LOGIC Copyright © Cirruo Logih, Inc. 2009 nAR '0Q http://www.cirrus.com (All Rights ReseAeR) T^L09 DS59F7