Datasheet AD7902 (Analog Devices) - 9
| Hersteller | Analog Devices |
| Beschreibung | Dual Pseudo Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP |
| Seiten / Seite | 29 / 9 — AD7902. Data Sheet. TYPICAL PERFORMANCE CHARACTERISTICS. 1.0. POSITIVE … |
| Revision | B |
| Dateiformat / Größe | PDF / 691 Kb |
| Dokumentensprache | Englisch |
AD7902. Data Sheet. TYPICAL PERFORMANCE CHARACTERISTICS. 1.0. POSITIVE INL: +0.35 LSB. POSITIVE DNL: +0.38 LSB
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AD7902 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V, VREF = 5.0 V, VIO = 3.3 V, TA = 25°C, fSAMPLE = 1 MSPS, fIN = 10 kHz, unless otherwise noted.
1.0 1.0 POSITIVE INL: +0.35 LSB POSITIVE DNL: +0.38 LSB NEGATIVE INL: –0.90 LSB NEGATIVE DNL: –0.42 LSB 0.8 0.8 0.6 0.6 0.4 0.4 ) 0.2 0.2 B B) S LS L 0 ( 0 L ( IN –0.2 DNL –0.2 –0.4 –0.4 –0.6 –0.6 –0.8 –0.8 –1.0 –1.0 0 16384 32768 49152 65536
405
0 16384 32768 49152 65536
408
CODE
1756- 1756- 1
CODE
1 Figure 5. Integral Nonlinearity vs. Code, VREF = 5 V Figure 8. Differential Nonlinearity vs. Code, VREF = 5 V
1.0 1.0 POSITIVE INL: +0.60 LSB POSITIVE DNL: +0.60 LSB NEGATIVE INL: –0.60 LSB NEGATIVE DNL: –0.58 LSB 0.8 0.8 0.6 0.6 0.4 0.4 ) 0.2 0.2 B B) S LS L 0 ( 0 L ( IN –0.2 DNL –0.2 –0.4 –0.4 –0.6 –0.6 –0.8 –0.8 –1.0 –1.0 0 16384 32768 49152 65536
406
0 16384 32768 49152 65536
409
CODE
1756- 1756- 1
CODE
1 Figure 6. Integral Nonlinearity vs. Code, VREF = 2.5 V Figure 9. Differential Nonlinearity vs. Code, VREF = 2.5 V
0 0 fSAMPLE = 1MSPS fSAMPLE = 1MSPS f f –20 IN = 10kHz –20 IN = 10kHz SNR = 91.37dB SNR = 85.85dB THD = –103.7dB THD = –103.0dB –40 SFDR = 104.5dB –40 SFDR = 105.2dB SINAD = 91.15dB SINAD = 85.76dB –60 –60 B) –80 B) –80 d d NR ( –100 NR ( –100 S S –120 –120 –140 –140 –160 –160 –180 –180 0 100 200 300 400 500
407
0 100 200 300 400 500
410
FREQUENCY (kHz)
1756- 1756- 1
FREQUENCY (kHz)
1 Figure 7. FFT Plot, VREF = 5 V Figure 10. FFT Plot, VREF = 2.5 V Rev. B | Page 8 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUTS DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT POWER SUPPLY DIGITAL INTERFACE CS MODE /CS Mode, 3-Wire Interface Without Busy Indicator /CS Mode, 3-Wire Interface with Busy Indicator /CS Mode, 4-Wire Interface Without Busy Indicator /CS Mode, 4-Wire Interface with Busy Indicator CHAIN MODE Chain Mode Without Busy Indicator Chain Mode with Busy Indicator APPLICATIONS INFORMATION SIMULTANEOUS SAMPLING FUNCTIONAL SAFTEY CONSIDERATIONS LAYOUT EVALUATING PERFORMANCE OF THE AD7902 OUTLINE DIMENSIONS ORDERING GUIDE NOTES
VDD = 2.5 V, VREF = 5.0 V, VIO = 3.3 V, TA = 25°C, fSAMPLE = 1 MSPS, fIN = 10 kHz, unless otherwise noted.
1.0 1.0 POSITIVE INL: +0.35 LSB POSITIVE DNL: +0.38 LSB NEGATIVE INL: –0.90 LSB NEGATIVE DNL: –0.42 LSB 0.8 0.8 0.6 0.6 0.4 0.4 ) 0.2 0.2 B B) S LS L 0 ( 0 L ( IN –0.2 DNL –0.2 –0.4 –0.4 –0.6 –0.6 –0.8 –0.8 –1.0 –1.0 0 16384 32768 49152 65536
405
0 16384 32768 49152 65536
408
CODE
1756- 1756- 1
CODE
1 Figure 5. Integral Nonlinearity vs. Code, VREF = 5 V Figure 8. Differential Nonlinearity vs. Code, VREF = 5 V
1.0 1.0 POSITIVE INL: +0.60 LSB POSITIVE DNL: +0.60 LSB NEGATIVE INL: –0.60 LSB NEGATIVE DNL: –0.58 LSB 0.8 0.8 0.6 0.6 0.4 0.4 ) 0.2 0.2 B B) S LS L 0 ( 0 L ( IN –0.2 DNL –0.2 –0.4 –0.4 –0.6 –0.6 –0.8 –0.8 –1.0 –1.0 0 16384 32768 49152 65536
406
0 16384 32768 49152 65536
409
CODE
1756- 1756- 1
CODE
1 Figure 6. Integral Nonlinearity vs. Code, VREF = 2.5 V Figure 9. Differential Nonlinearity vs. Code, VREF = 2.5 V
0 0 fSAMPLE = 1MSPS fSAMPLE = 1MSPS f f –20 IN = 10kHz –20 IN = 10kHz SNR = 91.37dB SNR = 85.85dB THD = –103.7dB THD = –103.0dB –40 SFDR = 104.5dB –40 SFDR = 105.2dB SINAD = 91.15dB SINAD = 85.76dB –60 –60 B) –80 B) –80 d d NR ( –100 NR ( –100 S S –120 –120 –140 –140 –160 –160 –180 –180 0 100 200 300 400 500
407
0 100 200 300 400 500
410
FREQUENCY (kHz)
1756- 1756- 1
FREQUENCY (kHz)
1 Figure 7. FFT Plot, VREF = 5 V Figure 10. FFT Plot, VREF = 2.5 V Rev. B | Page 8 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUTS DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT POWER SUPPLY DIGITAL INTERFACE CS MODE /CS Mode, 3-Wire Interface Without Busy Indicator /CS Mode, 3-Wire Interface with Busy Indicator /CS Mode, 4-Wire Interface Without Busy Indicator /CS Mode, 4-Wire Interface with Busy Indicator CHAIN MODE Chain Mode Without Busy Indicator Chain Mode with Busy Indicator APPLICATIONS INFORMATION SIMULTANEOUS SAMPLING FUNCTIONAL SAFTEY CONSIDERATIONS LAYOUT EVALUATING PERFORMANCE OF THE AD7902 OUTLINE DIMENSIONS ORDERING GUIDE NOTES