Typical Operating Characteristics (continued)
(VDD = +3V, VL = VDD, VREF = 2.048V, fSCLK = 24MHz, fSAMPLE = 1.5Msps, TA = -40°C to +85°C, unless otherwise noted. Typical
values are measured at TA = +25°C)
MAX1224/MAX1225
1.5Msps, Single-Supply, Low-Power,
True-Differential, 12-Bit ADCs
6
_______________________________________________________________________________________
DYNAMIC PERFORMANCE
vs. INPUT FREQUENCY (MAX1224)
MAX1224/25
toc10
ANALOG INPUT FREQUENCY (kHz)
DYNAMIC
PERFORMANCE
(dB)
400
300
200
69.25
69.50
69.75
70.00
69.00
100
500
SNR
SINAD
DYNAMIC PERFORMANCE
vs. INPUT FREQUENCY (MAX1225)
MAX1224/25
toc11
ANALOG INPUT FREQUENCY (kHz)
DYNAMIC
PERFORMANCE
(dB)
400
300
200
68.75
69.00
69.25
69.50
68.50
100
500
SNR
SINAD
THD vs. INPUT FREQUENCY
MAX1224/25
toc12
ANALOG INPUT FREQUENCY (kHz)
THD
(dB)
400
300
200
-90
-88
-86
-84
-82
-92
100
500
MAX1224
MAX1225
SFDR vs. INPUT FREQUENCY
MAX1224/25
toc13
ANALOG INPUT FREQUENCY (kHz)
SFDR
(dB)
400
300
200
84
86
88
90
92
82
100
500
MAX1225
MAX1224
FFT PLOT (MAX1224)
MAX1224/25
toc14
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE
(dB)
625
500
375
250
125
-120
-100
-80
-60
-40
-20
0
-140
0
750
fIN = 500kHz
SINAD = 69.4dB
SNR = 69.6dB
THD = -83.9dB
SFDR = 84.3dB
FFT PLOT (MAX1225)
MAX1224/25
toc15
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE
(dB)
625
500
375
250
125
-120
-100
-80
-60
-40
-20
0
-140
0
750
fIN = 500kHz
SINAD = 69.2dB
SNR = 69.3dB
THD = -90.5dB
SFDR = 88.15dB