Datasheet AD7949-EP (Analog Devices) - 9
| Fabricante | Analog Devices |
| Descripción | 14-Bit, 8-Channel, 250 kSPS PulSAR ADC |
| Páginas / Página | 12 / 9 — Enhanced Product. AD7949-EP. TYPICAL PERFORMANCE CHARACTERISTICS. 1.0. … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 318 Kb |
| Idioma del documento | Inglés |
Enhanced Product. AD7949-EP. TYPICAL PERFORMANCE CHARACTERISTICS. 1.0. 0.5. ) B. B) S. L ( IN. DNL. –0.5. –1.0. 4,096. 8,192. 12,288. 16,384. CODES
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Enhanced Product AD7949-EP TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V to 5.5 V, VREF = 2.5 V to 5 V, VIO = 2.3 V to VDD, unless otherwise noted.
1.0 1.0 0.5 0.5 ) B B) S LS L 0 ( 0 L ( IN DNL –0.5 –0.5 –1.0 –1.0 0 4,096 8,192 12,288 16,384
005
0 4,096 8,192 12,288 16,384
008
CODES CODES
09822- 09822- Figure 5. Integral Nonlinearity vs. Code, VREF = VDD = 5 V Figure 8. Differential Nonlinearity vs. Code, VREF = VDD = 5 V
300k 300k VREF = VDD = 5V 261,120 259,473 VREF = VDD = 2.5V 250k 250k 200k 200k S S UNT 150k UNT 150k CO CO 100k 100k 50k 50k 0 0 0 1 0 0 0 0 0 0 0 955 693 0 0 0 0 0 1FFC 1FFD 1FFE 1FFF 2000 2001 2002 2003
006
1FFC 1FFD 1FFE 1FFF 2000 2001 2002 2003 2004
009
CODE IN HEX CODE IN HEX
09822- 09822- Figure 6. Histogram of a DC Input at Code Center Figure 9. Histogram of a DC Input at Code Center
0 0 VREF = VDD = 5V VREF = VDD = 2.5V –20 fS= 250kSPS –20 fs= 200kSPS fIN = 19.9kHz fIN = 19.9kHz ) SNR = 85.3dB ) le SNR = 84.2dB le –40 a –40 a c SINAD = 85.2dB c SINAD = 82.4dB S THD = –100dB S THD = –84dB SFDR = 103dB –60 SFDR = 85dB –60 Full- SECOND HARMONIC = –110dB Full- SECOND HARMONIC = –100dB of THIRD HARMONIC = –103dB –80 of THIRD HARMONIC = –85dB –80 dB dB ( ( E –100 E D D –100 –120 LITU LITU P P M –120 M A A –140 –140 –160 –160 –180 0 25 50 75 100 125
007
0 25 50 75 100
010
FREQUENCY (kHz) FREQUENCY (kHz)
09822- 09822- Figure 7. 20 kHz FFT, VREF = VDD = 5 V Figure 10. 20 kHz FFT, VREF = VDD = 2.5 V Rev. B | Page 9 of 12 Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Outline Dimensions Ordering Guide
VDD = 2.5 V to 5.5 V, VREF = 2.5 V to 5 V, VIO = 2.3 V to VDD, unless otherwise noted.
1.0 1.0 0.5 0.5 ) B B) S LS L 0 ( 0 L ( IN DNL –0.5 –0.5 –1.0 –1.0 0 4,096 8,192 12,288 16,384
005
0 4,096 8,192 12,288 16,384
008
CODES CODES
09822- 09822- Figure 5. Integral Nonlinearity vs. Code, VREF = VDD = 5 V Figure 8. Differential Nonlinearity vs. Code, VREF = VDD = 5 V
300k 300k VREF = VDD = 5V 261,120 259,473 VREF = VDD = 2.5V 250k 250k 200k 200k S S UNT 150k UNT 150k CO CO 100k 100k 50k 50k 0 0 0 1 0 0 0 0 0 0 0 955 693 0 0 0 0 0 1FFC 1FFD 1FFE 1FFF 2000 2001 2002 2003
006
1FFC 1FFD 1FFE 1FFF 2000 2001 2002 2003 2004
009
CODE IN HEX CODE IN HEX
09822- 09822- Figure 6. Histogram of a DC Input at Code Center Figure 9. Histogram of a DC Input at Code Center
0 0 VREF = VDD = 5V VREF = VDD = 2.5V –20 fS= 250kSPS –20 fs= 200kSPS fIN = 19.9kHz fIN = 19.9kHz ) SNR = 85.3dB ) le SNR = 84.2dB le –40 a –40 a c SINAD = 85.2dB c SINAD = 82.4dB S THD = –100dB S THD = –84dB SFDR = 103dB –60 SFDR = 85dB –60 Full- SECOND HARMONIC = –110dB Full- SECOND HARMONIC = –100dB of THIRD HARMONIC = –103dB –80 of THIRD HARMONIC = –85dB –80 dB dB ( ( E –100 E D D –100 –120 LITU LITU P P M –120 M A A –140 –140 –160 –160 –180 0 25 50 75 100 125
007
0 25 50 75 100
010
FREQUENCY (kHz) FREQUENCY (kHz)
09822- 09822- Figure 7. 20 kHz FFT, VREF = VDD = 5 V Figure 10. 20 kHz FFT, VREF = VDD = 2.5 V Rev. B | Page 9 of 12 Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Outline Dimensions Ordering Guide