CS5509-AS Cirrus Logic Inc, CS5509-AS Datasheet
CS5509-AS
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CS5509-AS Summary of contents
Page 1
... Low power, high resolution, and small package size make the CS5509 an ideal solution for loop-powered transmitters, panel meters, weigh scales, and battery powered instruments. ORDERING INFORMATION CS5509-AP CS5509-AS CS5509-ASZ -40 °C to +85 °C VREF- VA+ GND Digital Filter ...
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... Volts. In bipolar mode the CS5509 will output all 1's if the dc input magnitude ((AIN+) - (AIN-)) exceeds ((VREF+) - (VREF-)) and will output all 0's if the input becomes more negative in magnitude than -((VREF+) - (VREF-)) ...
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... VA ±10%; VD+ = 3.3V ±5%; GND = 0) A Symbol XIN 0.7 VD+ V All Pins Except XIN 0.6 VD+ IH XIN V All Pins Except XIN IL V (Note 9) (VD out out CS5509 Ratio Unit clk f /1622 Hz clk f /1928 Hz clk 1/f s out Min Typ Max Unit 3 2.0 - ...
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... CONV remains high continuously. clk CS5509 Min Typ Max Unit 30.0 32.768 53.0 kHz 30 - 330 kHz 1.0 µ 1.0 µ ...
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... XIN Internal Oscillator f External Clock clk (Note 10) t rise (Note 10) t fall t (Note 11) res t osu t (Note 13) wup t (Note 14) ccw t scl t cal t cpw t scn t bus t buh t (Note 15) con CS5509 Min Typ Max Unit 30.0 32.768 53.0 kHz 30 - 330 kHz 1 1 500 - ms 1800/f ...
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... XIN XIN/2 CAL CONV STATE Standby XIN XIN/2 CONV DRDY BP/UP STATE Standby 6 t ccw t t scl cal Calibration Figure 1. Calibration Timing (Not to Scale) t cpw t t scn con Conversion Figure 2. Conversion Timing (Not to Scale) CS5509 Standby t t bus buh Standby DS125F2 ...
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... SCLK falling to Hi-Z fd2 ( °C; VA ±10%; VD+ = 3.3V ±5%; Input pF) (Note 2) L Symbol f sclk t Pulse Width High ph t Pulse Width Low pl t csd (Note 17 fd1 t SCLK falling to Hi-Z fd2 CS5509 Min Typ Max Unit 0 - 2.5 MHz 200 - - ns 200 - - 200 ns - 150 310 150 ...
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... DRDY CS t csd SDATA(o) Hi-Z SCLK(i) DRDY CS t csd SDATA(o) Hi-Z SCLK(i) 8 MSB MSB-1 MSB MSB MSB-1 LSB Figure 3. Timing Relationships (Not to Scale) CS5509 t fd1 LSB+1 LSB t fd2 t pl DS125F2 ...
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... Bipolar Notes: 19. All voltages with respect to ground. 20. The CS5509 can be operated with a reference voltage as low as 100 mV; but with a corresponding reduction in noise-free resolution. The common mode voltage of the voltage reference may be any value as long as +VREF and -VREF remain inside the supply values of VA+ and GND. ...
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... SRAM, a digital filter and a serial interface. The CS5509 is optimized to operate from a 32.768 kHz crystal but can be driven by an external clock whose frequency is between 30kHz and 330kHz. When the digital filter is operated with a 32.768 kHz clock, the filter has zeros precisely at 50 and 60 Hz line frequencies and multiples thereof ...
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... BP/UP pin immediately after DRDY falls and leave BP/UP stable until DRDY falls again. The digital filter in the CS5509 has a Finite Im- pulse Response and is designed to settle to full ac- curacy in one conversion time. If CONV is left high, the CS5509 will perform con- tinuous conversions ...
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... Analog Input Impedance Considerations The analog input of the CS5509 can be modeled as illustrated in Figure 5. Capacitors (15 pF each) are used to dynamically sample each of the inputs (AIN+ and AIN-). Every half XIN cycle the switch alternately connects the capacitor to the output of the buffer and then directly to the AIN pin ...
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... Hz. Figure 8 illustrates that the phase characteristics of the filter are precisely linear phase. If the CS5509 is operated at a clock rate other than 32.768kHz, the filter characteristics, including the comb filter zeros, will scale with the operating clock frequency ...
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... XIN = 32.768 kHz 17 -3.093 -120 -140 Frequency (Hz) Figure 7. Filter Magnitude Plot line frequency interference will occur with the CS5509 running at 32.768kHz. 14 180 X1 = 32.768kHz 135 X2 = 330.00kHz -45 -90 -135 -180 0 160 200 240 1611.3 2014.2 2416.9 Frequency (Hz) ...
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... DS125F2 Serial Interface Logic The digital filter in the CS5509 takes 1624 clock cycles to compute an output word once a conver- sion begins. At the end of the conversion cycle, the filter will attempt to update the serial port. Two clock cycles prior to the update DRDY will go high ...
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... GND pin. 16 Figure 9a illustrates the System Connection Dia- gram for the CS5509. Note that all supply pins are bypassed with 0.1 µF capacitors and that the VD+ digital supply is derived from the VA+ supply. Fig- ure 9b illustrates the CS5509 operating from a +5V analog supply and +3 ...
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... Analog Signal + Voltage Reference - Figure 9a. System Connection Diagram Using a Single Supply DS125F2 10 Ω 0.1 µF 11 VA+ VD+ 4 XIN SCLK 5 XOUT SDATA CS5509 7 AIN+ 8 AIN- CONV CAL 9 VREF+ BP/UP 10 DRDY VREF- GND 12 CS5509 0.1 µ Serial Data 15 Interface Control Logic ...
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... Reference - Figure 9b. System Connection Diagram Using Split Supplies 18 0.1 µF 11 VA+ VD+ 4 XIN SCLK 5 XOUT SDATA CS5509 7 AIN+ 8 AIN- CONV CAL 9 VREF+ BP/UP 10 DRDY VREF- GND 12 CS5509 +3.3V to +5V Digital 0.1 µF Supply 13 14 Serial Data 15 Interface Control Logic 6 16 DS125F2 ...
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... DS125F2 DRDY 2 15 CONV SDATA 3 CAL 14 SCLK XIN XOUT GND 6 11 BP/UP VA AIN+ VREF AIN- VREF+ CS5509 DATA READY SERIAL DATA OUTPUT SERIAL CLOCK INPUT POSITIVE DIGITAL POWER GROUND POSITIVE ANALOG POWER VOLTAGE REFERENCE INPUT VOLTAGE REFERENCE INPUT 19 ...
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... The voltage between these pins can be any voltage between 1.0 and 3.6 volts. Power Supply Connections VA+ - Positive Analog Power, Pin 11. Positive analog supply voltage. Nominally +5 volts. VD+ - Positive Digital Power, Pin 13. Positive digital supply voltage. Nominally +5 volts or +3.3 volts. GND - Ground, Pin 12. Ground. 20 CS5509 DS125F2 ...
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... The deviation of the first code transition from the ideal ( LSB above the voltage on the AIN- pin.) when in unipolar mode (BP/UP low). Units are in LSBs. Bipolar Offset The deviation of the mid-scale transition (011...111 to 100...000) from the ideal ( LSB below the voltage on the AIN- pin.) when in bipolar mode (BP/UP high). Units are in LSBs DS125F2 CS5509 21 ...
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... E 10.11 10.41 10.67 0.398 0.410 E 0.292 0.295 7.42 7.49 7. 0.040 0.050 1.14 1.27 1.40 0. 0.89 0.016 µ 0° - 8° 0° CS5509 0. 0. 0. 0. 0. 0. 0. 5° MAX 0.410 0.510 0.610 0.710 MAX 0 ...
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... ENVIRONMENTAL, MANUFACTURING, & HANDLING INFORMATION Model CS5509-AP CS5509-AS CS5509-ASZ (lead free) * MSL (Moisture Sensitivity Level) as specified by IPC/JEDEC J-STD-020. REVISION HISTORY Revision Date F1 Aug ‘97 First “final” release. F2 Aug ‘05 Added lead-free device ordering info. Added legal notice. Added MSL data. ...