Datasheet AD7691 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | 18-Bit, 1.5 LSB INL, 250 kSPS PulSAR® Differential ADC in MSOP/QFN |
| Pages / Page | 29 / 10 — Data Sheet. AD7691. TYPICAL PERFORMANCE CHARACTERISTICS. 1.5. 1.0. … |
| Revision | E |
| File Format / Size | PDF / 937 Kb |
| Document Language | English |
Data Sheet. AD7691. TYPICAL PERFORMANCE CHARACTERISTICS. 1.5. 1.0. POSITIVE INL = 0.39LSB. POSITIVE DNL = 0.37LSB
Model Line for this Datasheet
Text Version of Document
Data Sheet AD7691 TYPICAL PERFORMANCE CHARACTERISTICS 1.5 1.0 POSITIVE INL = 0.39LSB POSITIVE DNL = 0.37LSB NEGATIVE INL = –0.73LSB NEGATIVE DNL = –0.33LSB 1.0 0.5 0.5 ) B B) S LS L 0 ( 0 L ( IN DNL –0.5 –0.5 –1.0 –1.5 –1.0 0 65536 131072 196608 262144
026
0 65536 131072 196608 262144
029
CODE CODE
06146- 06146- Figure 7. Integral Nonlinearity vs. Code 2.5 V Figure 10. Differential Nonlinearity vs. Code, 5 V
80k 45k VDD = REF = 5V VDD = REF = 2.5V 69769 σ = 0.76LSB σ = 1.42LSB 70k 40k 38068 35k 60k 30k 28179 50k S S 24411 25k UNT 40k UNT CO CO 20k 17460 28527 30k 27770 14362 15k 20k 10k 10k 5k 4055 2997 2904 2062 0 0 26 14 0 0 0 12 29 501 910 78 9 0 0 0 25 26 27 28 29 2A 2B 2C 2D 2E 2F
027
23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31
030
CODE IN HEX CODE IN HEX
06146- 06146- Figure 8. Histogram of a DC Input at the Code Center, 5 V Figure 11. Histogram of a DC Input at the Code Center, 2.5 V
0 0 32768 POINT FFT 32768 POINT FFT VDD = REF = 5V VDD = REF = 2.5V –20 –20 fS = 250kSPS fS = 180kSPS ) fIN = 2kHz ) fIN = 2kHz le –40 SNR = 101.4dB le –40 SNR = 96.4dB a a c THD = –120.1dB c THD = –120.3dB –60 2ND HARMONIC = –140.7dB –60 2ND HARMONIC = –132.5dB 3RD HARMONIC = –120.3dB 3RD HARMONIC = –121.2dB Full S Full S of –80 of –80 dB dB ( ( E –100 E –100 D D –120 –120 LITU LITU P P M M A –140 A –140 –160 –160 –180 –180 0 20 40 60 80 100 120
028
0 10 20 30 40 50 60 70 80 90
031
FREQUENCY (kHz) FREQUENCY (kHz)
06146- 06146- Figure 9. 2 kHz FFT Plot, 5 V Figure 12. 2 kHz FFT Plot, 2.5 V Rev. E | Page 9 of 28 Document Outline FEATURES APPLICATIONS APPLICATION DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Thermal Resistance ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUTS DRIVER AMPLIFIER CHOICE SINGLE-TO-DIFFERENTIAL DRIVER VOLTAGE REFERENCE INPUT POWER SUPPLY SUPPLYING THE ADC FROM THE REFERENCE DIGITAL INTERFACE CS\ MODE, 3-WIRE WITHOUT BUSY INDICATOR CS\ MODE, 3-WIRE WITH BUSY INDICATOR CS\ MODE, 4-WIRE WITHOUT BUSY INDICATOR CS\ MODE, 4-WIRE WITH BUSY INDICATOR CHAIN MODE WITHOUT BUSY INDICATOR CHAIN MODE WITH BUSY INDICATOR APPLICATION HINTS LAYOUT EVALUATING THE AD7691 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE
026
0 65536 131072 196608 262144
029
CODE CODE
06146- 06146- Figure 7. Integral Nonlinearity vs. Code 2.5 V Figure 10. Differential Nonlinearity vs. Code, 5 V
80k 45k VDD = REF = 5V VDD = REF = 2.5V 69769 σ = 0.76LSB σ = 1.42LSB 70k 40k 38068 35k 60k 30k 28179 50k S S 24411 25k UNT 40k UNT CO CO 20k 17460 28527 30k 27770 14362 15k 20k 10k 10k 5k 4055 2997 2904 2062 0 0 26 14 0 0 0 12 29 501 910 78 9 0 0 0 25 26 27 28 29 2A 2B 2C 2D 2E 2F
027
23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31
030
CODE IN HEX CODE IN HEX
06146- 06146- Figure 8. Histogram of a DC Input at the Code Center, 5 V Figure 11. Histogram of a DC Input at the Code Center, 2.5 V
0 0 32768 POINT FFT 32768 POINT FFT VDD = REF = 5V VDD = REF = 2.5V –20 –20 fS = 250kSPS fS = 180kSPS ) fIN = 2kHz ) fIN = 2kHz le –40 SNR = 101.4dB le –40 SNR = 96.4dB a a c THD = –120.1dB c THD = –120.3dB –60 2ND HARMONIC = –140.7dB –60 2ND HARMONIC = –132.5dB 3RD HARMONIC = –120.3dB 3RD HARMONIC = –121.2dB Full S Full S of –80 of –80 dB dB ( ( E –100 E –100 D D –120 –120 LITU LITU P P M M A –140 A –140 –160 –160 –180 –180 0 20 40 60 80 100 120
028
0 10 20 30 40 50 60 70 80 90
031
FREQUENCY (kHz) FREQUENCY (kHz)
06146- 06146- Figure 9. 2 kHz FFT Plot, 5 V Figure 12. 2 kHz FFT Plot, 2.5 V Rev. E | Page 9 of 28 Document Outline FEATURES APPLICATIONS APPLICATION DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Thermal Resistance ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUTS DRIVER AMPLIFIER CHOICE SINGLE-TO-DIFFERENTIAL DRIVER VOLTAGE REFERENCE INPUT POWER SUPPLY SUPPLYING THE ADC FROM THE REFERENCE DIGITAL INTERFACE CS\ MODE, 3-WIRE WITHOUT BUSY INDICATOR CS\ MODE, 3-WIRE WITH BUSY INDICATOR CS\ MODE, 4-WIRE WITHOUT BUSY INDICATOR CS\ MODE, 4-WIRE WITH BUSY INDICATOR CHAIN MODE WITHOUT BUSY INDICATOR CHAIN MODE WITH BUSY INDICATOR APPLICATION HINTS LAYOUT EVALUATING THE AD7691 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE
