AD9680 Datasheet, PDF (29/97 Pages) Analog Devices – Dual, 14-Bit, 1.25 GSPS, 1.2 V/2.5 V, Analog-to-Digital Converter

Product
Overview
Data Sheet
Online
Documentation
Design
Resources
Discussion
Sample
& Buy
AD9680
AD9680-500
AVDD1 = 1.25 V, AVDD1_SR = 1.25 V, AVDD2 = 2.5 V, AVDD3 = 3.3 V, DVDD = 1.25 V, DRVDD = 1.25 V, SPIVDD = 1.8 V, 2.06 V p-p
full-scale differential input, AIN = −1.0 dBFS, default SPI settings, clock divider = 2, TA = 25°C, 128k FFT sample, unless otherwise noted.
See Table 10 for recommended settings.
0
0
A_IN = −1dBFS
A_IN = −1dBFS
SNR = 68.9dBFS
SNR = 67.8dBFS
–20
ENOB = 10.9 BITS
SFDR = 83dBFS
–20
ENOB = 10.8 BITS
SFDR = 83dBFS
BUFFER CONTROL 1 = 2.0×
BUFFER CONTROL 1 = 4.5×
–40
–40
–60
–60
–80
–80
–100
–100
–120
–120
–140
0
25 50 75 100 125 150 175 200 225 250
FREQUENCY (MHz)
Figure 80. Single-Tone FFT with fIN = 10.3 MHz
–140
0
25 50 75 100 125 150 175 200 225 250
FREQUENCY (MHz)
Figure 83. Single-Tone FFT with fIN = 450.3 MHz
0
A_IN = −1dBFS
SNR = 68.9dBFS
–20 ^{ENOB = 11 BITS}
SFDR = 88dBFS
BUFFER CONTROL 1 = 2.0×
–40
–60
–80
–100
–120
–140
0
25 50 75 100 125 150 175 200 225 250
FREQUENCY (MHz)
Figure 81. Single-Tone FFT with fIN = 170.3 MHz
0
A_IN = −1dBFS
SNR = 64.7dBFS
–20
ENOB = 10.4 BITS
SFDR = 80dBFS
BUFFER CONTROL 1 = 5.0×
–40
–60
–80
–100
–120
–140
0
25 50 75 100 125 150 175 200 225 250
FREQUENCY (MHz)
Figure 84. Single-Tone FFT with fIN = 765.3 MHz
0
A_IN = −1dBFS
SNR = 68.5dBFS
–20
ENOB = 10.9 BITS
SFDR = 83dBFS
BUFFER CONTROL 1 = 4.5×
–40
–60
–80
–100
–120
–140
0 25 50 75 100 125 150 175 200 225 250
FREQUENCY (MHz)
Figure 82. Single-Tone FFT with fIN = 340.3 MHz
0
A_IN = −1dBFS
SNR = 64.0dBFS
–20
ENOB = 10.3 BITS
SFDR = 76dBFS
BUFFER CONTROL 1 = 5.0×
–40
–60
–80
–100
–120
–140
0
25 50 75 100 125 150 175 200 225 250
FREQUENCY (MHz)
Figure 85. Single-Tone FFT with fIN = 985.3 MHz
Rev. C | Page 29 of 97