Datasheet AD7441, AD7451 (Analog Devices) - 10

AD7441/AD7451 TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, fS = 1 MSPS, fSCLK = 18 MHz, VDD = 2.7 V to 5.25 V, VREF = 2.5 V, unless otherwise noted.
75 1.0 VDD = 5.25V 0.8 0.6 70 VDD = 4.75V ) 0.4 B ) VDD = 3.6V S B L 0.2 d R ( 65 RO 0 INAD ( R S VDD = 2.7V E –0.2 NL D –0.4 60 –0.6 –0.8 55 –1.0 10 100 1000
7 10 -00 0 3
0 1024 2048 3072 4096
3-
FREQUENCY (kHz)
15 15 03
CODE
03 Figure 7. SINAD vs. Analog Input Frequency for the AD7451 for Figure 10. Typical DNL for the AD7451 for VDD = 5 V Various Supply Voltages
0 1.0 100mV p-p SINE WAVE ON VDD NO DECOUPLING ON VDD 0.8 –20 0.6 0.4 –40 B) S 0.2 B) L d R ( –60 0 RR ( V S DD = 3V RRO P E –0.2 –80 VDD = 5V INL –0.4 –0.6 –100 –0.8 –120 –1.0 0 100 200 300 400 500 600 700 800 900 1000
8
0 1024 2048 3072 4096
11 0 -00 3 3-
SUPPLY RIPPLE FREQUENCY (kHz)
15
CODE
15 03 03 Figure 8. PSRR vs. Supply Ripple Frequency Without Supply Decoupling Figure 11. Typical INL for the AD7451 for VDD = 5 V
0 10000 8192 POINT FFT 9949 f CODES SAMPLE = 1MSPS 9000 –20 fIN = 100kSPS SINAD = 71dB 8000 THD = –82dB –40 SFDR = –83dB 7000 6000 B) –60 S d R ( UNT 5000 N S –80 CO 4000 –100 3000 2000 –120 1000 27 CODES 24 CODES –140 0 0 100 200 300 400 500
09 12 0
2046 2047 2048 2049 2050 2051
0 3- 3-
FREQUENCY (kHz)
15 315
CODES
0 03 Figure 9. AD7451 Dynamic Performance for VDD = 5 V Figure 12. Histogram of 10,000 Conversions of a DC Input for the AD7451 Rev. D | Page 10 of 24 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION ADC TRANSFER FUNCTION TYPICAL CONNECTION DIAGRAM ANALOG INPUT ANALOG INPUT STRUCTURE DIGITAL INPUTS REFERENCE SERIAL INTERFACE Timing Example 1 Timing Example 2 MODES OF OPERATION NORMAL MODE POWER-DOWN MODE Power-Up Time POWER VS. THROUGHPUT RATE MICROPROCESSOR AND DSP INTERFACING AD7441/AD7451 to ADSP-21xx AD7441/AD7451 to TMS320C5x/C54x AD7441/AD7451 to DSP56xxx GROUNDING AND LAYOUT HINTS EVALUATING PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE