Datasheet AD7298-1 (Analog Devices) - 10

AD7298-1 TYPICAL PERFORMANCE CHARACTERISTICS 0 0.50 VDD = VDRIVE = 3V –10 fSAMPLE = 1.17647MHz 0.40 fIN = 50kHz –20 fSCLK = 20MHz 0.30 SNR = 61.83dB –30 ) THD = –80.23dB 0.20 INL (Positive) dB ( –40 R ) 0.10 –50 SB OWE 0 (L –60 L L P INL (Negative) A IN –0.10 –70 IGN S –0.20 –80 –0.30 –90 –100 –0.40 –110 –0.50 0 100 200 300 400 500 600
047
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6
038
FREQUENCY (MHz) V
09321-
REF (V)
09321- Figure 3. Typical FFT Figure 6. INL vs. VREF
1.0 0.50 VDD = 3V 0.8 VDRIVE = 3V 0.40 0.6 0.30 INL (Positive) 0.4 0.20 ) 0.2 ) 0.10 SB SB 0 (L (L 0 L L IN 0.2 DN –0.10 INL (Negative) 0.4 –0.20 –0.6 –0.30 –0.8 –0.40 –1.0 –0.50 1 101 201 301 401 501 601 701 801 901 1001
040
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6
039
CODE V
09321-
REF (V)
09321- Figure 4. Typical ADC INL Figure 7. DNL vs. VREF
1.0 11 VDD = 3V 0.8 VDRIVE = 3V 10 0.6 9 ITS 0.4 8 B) S 0.2 OF B L R ( E 7 B 0 M DNL U 6 N 0.2 E TIV 5 –0.4 C FFE –0.6 4 E –0.8 3 VDD = 3V VDRIVE = 3V –1.0 2 1 101 201 301 401 501 601 701 801 901 1001
041
0 0.5 1.0 1.5 2.0 2.5
042
CODE
09321-
EXTERNAL VOLTAGE REFERENCE (V)
09321- Figure 5. Typical ADC DNL Figure 8. Effective Number of Bits vs. VREF Rev. A | Page 9 of 24 Document Outline Features Functional Block Diagram General Description Product Highlights Revision History Specifications Timing Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Description Typical Performance Characteristics Terminology Circuit Information Converter Operation Analog Input ADC Transfer Function VDRIVE The Internal or External Reference Control Register Modes of Operation Traditional Multichannel Mode of Operation Repeat Operation Power-Down Modes Normal Mode Partial Power-Down Mode Full Power-Down Mode Powering Up the AD7298-1 Reset Serial Interface Layout and Configuration Outline Dimensions Ordering Guide