Datasheet AD7691-EP (Analog Devices) - 9

Enhanced Product AD7691-EP 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
12156-
CODE
12156- Figure 6. Integral Nonlinearity (INL) vs. Code 2.5 V Figure 9. Differential Nonlinearity (DNL) 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 4055 5k 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
12156-
CODE IN HEX
12156- Figure 7. Histogram of a DC Input at the Code Center, 5 V Figure 10. 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)
12156-
FREQUENCY (kHz)
12156- Figure 8. 2 kHz FFT Plot, 5 V Figure 11. 2 kHz FFT Plot, 2.5 V Rev. A | Page 9 of 13 Document Outline Features Enhanced Product Features Applications Application Diagram General Description Table of Contents Revision History Specifications Timing Specifications Timing Diagrams Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Outline Dimensions Ordering Guide