Cirrus Logic CS3002 - Manual (Page 2)

CS3002
2 DS490F10
TABLE OF CONTENTS
1. Characteristics and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Typical Performance Plots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Open-loop Gain and Phase Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Open-loop Gain and Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2.1 Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2.2 Gain Calculation Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . 11
Calculate the Compensation Capacitor Value: . . . . . . . . . . . . . . . . . 11
Verify the Op Amp Compensation: . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4. Package Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6. Environmental, Manufacturing, & Handling Information . . . . . . . . . . . . . . . . . . 13
7. Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
LIST OF FIGURES
Figure 1. Noise vs. Frequency (Measured)................................................................................... 4
Figure 2. Noise vs. Frequency ...................................................................................................... 4
Figure 3. 0.01Hz to 10Hz Noise ................................................................................................... 4
Figure 4. Offset Voltage Stability (DC to 3.2Hz) ........................................................................... 4
Figure 5. Supply Current vs. Temperature.................................................................................... 4
Figure 6. Supply Current vs. Supply Voltage ................................................................................ 4
Figure 7. Open-loop Gain and Phase vs. Frequency.................................................................... 5
Figure 8. Open-loop Gain and Phase vs. Frequency (Expanded) ................................................ 5
Figure 9. Input Bias Current vs. Supply Voltage ........................................................................... 6
Figure 10. Input Bias Current vs. Common Mode Voltage ........................................................... 6
Figure 11. Voltage Swing vs. Output Current ............................................................................... 7
Figure 12. Voltage Swing vs. Output Current (5V) ....................................................................... 7
Figure 13. Open-loop Gain and Phase Response ........................................................................ 8
Figure 14. Non-inverting Gain Configuration ................................................................................ 9
Figure 15. Non-inverting Gain Configuration with Compensation ................................................. 9
Figure 16. Loop Gain Plot: Unity Gain and with Pole-zero Compensation ................................. 10
Figure 17. Thermopile Amplifier with a Gain of 650V/V ............................................................. 12
Figure 18. Load Cell Bridge Amplifier and A/D Converter .......................................................... 12