CS5504 Datasheet | Cirrus Logic

Features Description The CS5504 is a 2-channel, fully differential 20-bit, serial-output CMOS A/D converter. The CS5504 uses charge-balanced (delta-sigma) techniques to provide a low cost, high-resolution measurement at output word rates up to 200 samples per second. The on-chip digital filter offers superior line rejection at 50 Hz and 60 Hz when the device is operated from a 32.768 k Hz clock (output word rate = 20 Sps). The CS5504 has on-chip self-calibration circuitry which can be initiated at any time or temperature to ensure minimum offset and full-scale errors. Low power, high-resolution and small package size make the CS5504 an ideal solution for loop-powered transmitters, panel meters, weigh scales and batterypowered instruments. ORDERING INFORMATION See page 23. CS5504-BS -40° to +85° C 20-pin SOIC I l Delta-sigma A/D Converter l 2 Differential Inputs .. - 20-bit, No Missing Codes - Linearity Error: ±0.0007%FS - Pin-selectable Unipolar/Bipolar Ranges - mon Mode Rejection 105 d B @ dc 120 d B @ 50, 60 Hz l Either 5V or 3.3V Digital Interface l On-chip Self-calibration Circuitry l Output Update Rates up to 200/Sps l Low Power Consumption: 4.4 m W VREF+ 12 VREF13 VA+ 14 VA15 DGND 16 VD+ 17 2 AIN1+ AIN1AIN2+ AIN2- 8 10 9 11 MUX 4th-Order Delta-Sigma Modulator Serial Interface Logic 18 19 CS SCLK SDATA Digital Filter 20 DRDY A0 4 Calibration µC Calibration SRAM 3 CONV OSC 5 XIN 6 XOUT 7 CAL BP/UP Cirrus Logic, Inc. Crystal Semiconductor Products Division http://.cirrus. P.O. Box 17847, Austin, Texas 78760 (512) 445 7222 FAX: (512) 445 7581 http://.crystal. Copyright © Cirrus Copyright © Cirrus Logic, Inc. 2005Logic, Inc. 1997 (All Rights Reserved) (All Rights Reserved) AUG ‘95 ‘05 MAR AUG ‘05 DS126F2 DS126F1 1 DS126DB2 ANALOG CHARACTERISTICS (TA = TMIN to TMAX; VA+ = 5V ± 10%; VA- = -5V ± 10%; VD+ = 3.3V ± 5%; VREF+ = 2.5V, VREF- = 0V; f CLK = 32.768k Hz; Bipolar Mode; Rsource = 1kΩ with a 10n F to GND at AIN.) (Notes 1,...