Datasheet AD7724 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | Dual, 7th-Order, Sigma-Delta Modulator |
| Pages / Page | 17 / 10 — AD7724. 1.0. 0.8. 0.6. 0.4. LSB –. 0.2. –0.2. INL ERROR. –0.4. –0.6. … |
| Revision | B |
| File Format / Size | PDF / 322 Kb |
| Document Language | English |
AD7724. 1.0. 0.8. 0.6. 0.4. LSB –. 0.2. –0.2. INL ERROR. –0.4. –0.6. –0.8. –1.0 0. 20000. 40000. 65535. CODE. –10. –20. –30. –40. –50. –60. –70. –80. –90. –100. –110. –120. –130
Model Line for this Datasheet
Text Version of Document
AD7724 1.0 0.8 0.6 0.4 LSB – 0.2 0 –0.2 INL ERROR –0.4 –0.6 –0.8 –1.0 0 20000 40000 65535 CODE
TPC 10. Integral Nonlinearity Error
0 0 –10 –10 –20 –20 –30 –30 –40 –40 –50 –50 –60 dB –60 dB –70 –70 –80 –80 –90 –90 –100 –100 –110 –110 –120 –120 –130 –130 0 6.5 0 409.0268 FREQUENCY – MHz FREQUENCY – kHz
TPC 11. Modulator Output (0 Hz to MCLK/2) TPC 14. Modulator Output (0 to 409.0268 kHz)
0 0 –20 CLKIN = 13MHz –20 AIN = 90kHz SNR = 90.1dB CLKIN = 13MHz –40 S/(N+D) = 89.2dB –40 SNR = 89.6dB SFDR = –99.5dB S/(N+D) = 89.6dB –60 THD = –96.6dB –60 SFDR = –108.0dB 2ND = –100.9dB dB –80 3RD = –106.0dB dB –80 4TH = –99.5dB –100 –100 –120 –120 –140 –140 –154 –154 0E+0 10E+3 20E+3 30E+3 40E+3 50E+3 60E+3 70E+3 80E+3 90E+3 98E+3 0E+0 10E+3 20E+3 30E+3 40E+3 50E+3 60E+3 70E+3 80E+3 90E+3 98E+3
TPC 12. 16K Point FFT TPC 15. 16K Point FFT
0 0 –20 XTAL = 12.288MHz –20 AIN = 90kHz SNR = 89.0dB XTAL = 12.288MHz –40 S/(N+D) = 87.8dB –40 SNR = 88.1dB SFDR = –94.3dB S/(N+D) = 88.1dB –60 THD = –93.8dB –60 SFDR = –103.7dB 2ND = –94.3dB dB –80 3RD = –108.5dB dB –80 4TH = –105.7dB –100 –100 –120 –120 –140 –140 –154 –154 0E+0 10E+3 20E+3 30E+3 40E+3 50E+3 60E+3 70E+3 80E+3 90E+3 96E+3 0E+0 10E+3 20E+3 30E+3 40E+3 50E+3 60E+3 70E+3 80E+3 90E+3 96E+3
TPC 13. 16K Point FFT TPC 16. 16K Point FFT REV. B –9–
TPC 10. Integral Nonlinearity Error
0 0 –10 –10 –20 –20 –30 –30 –40 –40 –50 –50 –60 dB –60 dB –70 –70 –80 –80 –90 –90 –100 –100 –110 –110 –120 –120 –130 –130 0 6.5 0 409.0268 FREQUENCY – MHz FREQUENCY – kHz
TPC 11. Modulator Output (0 Hz to MCLK/2) TPC 14. Modulator Output (0 to 409.0268 kHz)
0 0 –20 CLKIN = 13MHz –20 AIN = 90kHz SNR = 90.1dB CLKIN = 13MHz –40 S/(N+D) = 89.2dB –40 SNR = 89.6dB SFDR = –99.5dB S/(N+D) = 89.6dB –60 THD = –96.6dB –60 SFDR = –108.0dB 2ND = –100.9dB dB –80 3RD = –106.0dB dB –80 4TH = –99.5dB –100 –100 –120 –120 –140 –140 –154 –154 0E+0 10E+3 20E+3 30E+3 40E+3 50E+3 60E+3 70E+3 80E+3 90E+3 98E+3 0E+0 10E+3 20E+3 30E+3 40E+3 50E+3 60E+3 70E+3 80E+3 90E+3 98E+3
TPC 12. 16K Point FFT TPC 15. 16K Point FFT
0 0 –20 XTAL = 12.288MHz –20 AIN = 90kHz SNR = 89.0dB XTAL = 12.288MHz –40 S/(N+D) = 87.8dB –40 SNR = 88.1dB SFDR = –94.3dB S/(N+D) = 88.1dB –60 THD = –93.8dB –60 SFDR = –103.7dB 2ND = –94.3dB dB –80 3RD = –108.5dB dB –80 4TH = –105.7dB –100 –100 –120 –120 –140 –140 –154 –154 0E+0 10E+3 20E+3 30E+3 40E+3 50E+3 60E+3 70E+3 80E+3 90E+3 96E+3 0E+0 10E+3 20E+3 30E+3 40E+3 50E+3 60E+3 70E+3 80E+3 90E+3 96E+3
TPC 13. 16K Point FFT TPC 16. 16K Point FFT REV. B –9–
