Typical operating characteristics – Rainbow Electronics MAX1449 User Manual
Page 5
MAX1449
10-Bit, 105Msps, Single +3.3V, Low-Power
ADC with Internal Reference
_______________________________________________________________________________________
5
-100
-70
-80
-90
-60
-50
-40
-30
-20
-10
0
0
20
10
30
40
50
60
FFT PLOT (f
IN
= 7.5MHz,
8192-POINT FFT, DIFFERENTIAL INPUT)
MAX1449 toc01
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
SNR = 58.6dB
SINAD = 58.4dB
THD = -72.7dBc
SFDR = 73.6dBc
2ND HARMONIC
3RD HARMONIC
-100
-70
-80
-90
-60
-50
-40
-30
-20
-10
0
0
20
10
30
40
50
60
MAX1449 toc02
FFT PLOT (f
IN
= 19.99MHz,
8192-POINT FFT, DIFFERENTIAL INPUT)
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
SNR = 58.5dB
SINAD = 58.4dB
THD = -73.7dBc
SFDR = 75.9dBc
2ND HARMONIC
3RD HARMONIC
-100
-70
-80
-90
-60
-50
-40
-30
-20
-10
0
0
20
10
30
40
50
60
MAX1449 toc03
UNDERSAMPLING FFT PLOT (f
IN
= 50.12MHz,
8192-POINT FFT, DIFFERENTIAL INPUT)
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
SNR = 57.9dB
SINAD = 56.7dB
THD = -71.3dBc
SFDR = 71.1dBc
2ND HARMONIC
3RD HARMONIC
-100
-70
-80
-90
-60
-50
-40
-30
-20
-10
0
0
20
10
30
40
50
60
MAX1449 toc04
FFT PLOT (f
IN
= 7.5MHz,
8192-POINT FFT, SINGLE-ENDED INPUT)
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
SNR = 57.7dB
SINAD = 57.5dB
THD = -71.8dBc
SFDR = 74.4dBc
2ND HARMONIC
3RD HARMONIC
-100
-70
-80
-90
-60
-50
-40
-30
-20
-10
0
0
20
10
30
40
50
60
MAX1449 toc05
FFT PLOT (f
IN
= 19.99MHz,
8192-POINT FFT, SINGLE-ENDED INPUT)
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
SNR = 57.7dB
SINAD = 57.2dB
THD = -67dBc
SFDR = 67.7dBc
2ND HARMONIC
3RD HARMONIC
-100
-70
-80
-90
-60
-50
-40
-30
-20
-10
0
0
20
10
30
40
50
60
MAX1449 toc06
TWO-TONE INTERMODULATION
(8192-POINT IMD, DIFFERENTIAL INPUT)
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
f
1
= 38MHz AT -6.5dB FS
f
2
= 42MHz AT -6.5dB FS
2ND ORDER IMD
3RD ORDER IMD
f
1
f
2
80
50
1
10
100
SPURIOUS-FREE DYNAMIC RANGE
vs. ANALOG INPUT FREQUENCY
56
MAX1449 toc07
ANALOG INPUT FREQUENCY (MHz)
SFDR (dBc)
62
68
74
DIFFERENTIAL
SINGLE-ENDED
60
50
1
10
100
SIGNAL-TO-NOISE RATIO
vs. ANALOG INPUT FREQUENCY
52
MAX1449 toc08
ANALOG INPUT FREQUENCY (MHz)
SNR (dB)
54
56
58
DIFFERENTIAL
SINGLE-ENDED
THD (dBc)
-50
-80
1
10
100
TOTAL HARMONIC DISTORTION
vs. ANALOG INPUT FREQUENCY
-74
MAX1449 toc09
ANALOG INPUT FREQUENCY (MHz)
-68
-62
-56
DIFFERENTIAL
SINGLE-ENDED
Typical Operating Characteristics
(V
DD
= +3.3V, OV
DD
= +2.0V, internal reference, differential input at -0.5dB FS, f
CLK
= 106.2345MHz, C
L
≈ 10pF, T
A
= +25°C,
unless otherwise noted.)