Typical operating characteristics – Rainbow Electronics MAX1427 User Manual
Page 5
MAX1427
15-Bit, 80Msps ADC with -79.3dBFS
Noise Floor for Baseband Applications
_______________________________________________________________________________________
5
FFT PLOT (32,768-POINT DATA RECORD,
COHERENT SAMPLING)
MAX1427 toc01
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dBFS)
25
20
15
10
5
-100
-80
-60
-40
-20
0
-120
0
40
35
30
f
CLK
= 80.0195MHz
f
IN
= 9.9999MHz
A
IN
= -1.04dBFS
SNR = 76.3dB
SFDR1 = 96.2dBc
SFDR2 = 98.91dBc
HD2 = -102.5dBc
HD3 = -96.2dBc
FFT PLOT (32,768-POINT DATA RECORD,
COHERENT SAMPLING)
MAX1427 toc02
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dBFS)
25
20
15
10
5
-100
-80
-60
-40
-20
0
-120
0
40
35
30
f
CLK
= 80.0195MHz
f
IN
= 15.0012MHz
A
IN
= -1.00dBFS
SNR = 76dB
SFDR1 = 94.7dBc
SFDR2 = 94.7dBc
HD2 = -94.7dBc
HD3 = -104.8dBc
FFT PLOT (32,768-POINT DATA RECORD,
COHERENT SAMPLING)
MAX1427 toc03
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dBFS)
25
20
15
10
5
-100
-80
-60
-40
-20
0
-120
0
40
35
30
f
CLK
= 80.0195MHz
f
IN
= 35.0012MHz
A
IN
= -1.02dBFS
SNR = 75.5dB
SFDR1 = 84.4dBc
SFDR2 = 87dBc
HD2 = -84.4dBc
HD3 = -91.6dBc
SNR vs. ANALOG INPUT FREQUENCY
(f
CLK
= 80.0195MHz, A
IN
= -1dBFS)
MAX1427 toc04
f
IN
(MHz)
SNR (dB)
55
45
15
25
35
71
72
73
74
75
76
77
78
70
5
75
70
65
SFDR1/SFDR2 vs. ANALOG INPUT FREQUENCY
(f
CLK
= 80.0195MHz, A
IN
= -1dBFS)
MAX1427 toc05
f
IN
(MHz)
SFDR1/SFDR2 (dBc)
55
45
35
25
15
75
80
85
90
95
100
70
5
75
70
65
SFDR2
SFDR1
HD2/HD3 vs. ANALOG INPUT FREQUENCY
(f
CLK
= 80.0195MHz, A
IN
= -1dBFS)
MAX1427 toc06
f
IN
(MHz)
HD2/HD3 (dBc)
55
45
35
25
15
-100
-95
-90
-85
-80
-75
-110
-105
5
75
70
65
HD2
HD3
FULL-SCALE-TO-NOISE RATIO
vs. ANALOG INPUT AMPLITUDE
(f
CLK
= 80.0195MHz, f
IN
= 15.0012MHz)
MAX1427 toc07
ANALOG INPUT AMPLITUDE (dBFS)
FULL-SCALE-TO-NOISE RATIO (dBFS)
-10
-20
-40
-30
-50
-60
71
72
73
74
75
76
77
78
79
80
70
-70
0
SFDR1/SFDR2 vs. ANALOG INPUT AMPLITUDE
(f
CLK
= 80.0195MHz, f
IN
= 15.0012MHz)
MAX1427 toc08
ANALOG INPUT AMPLITUDE (dBFS)
SFDR1/SFDR2 (dBFS)
-10
-20
-40
-30
-50
-60
80
90
100
110
120
130
70
-70
0
SFDR1
SFDR2
HD2/HD3 vs. ANALOG INPUT AMPLITUDE
(f
CLK
= 80.195MHz, f
IN
= 15.00102MHz)
MAX1427 toc09
ANALOG INPUT AMPLITUDE (dBFS)
HD2/HD3 (dBFS)
-10
-20
-40
-30
-50
-60
-120
-110
-100
-90
-80
-70
-150
-140
-130
-70
0
HD2
HD3
Typical Operating Characteristics
(AV
CC
= 5V, DV
CC
= DRV
CC
= 2.5V, INP and INN driven differentially with a -1dBFS amplitude, CLKP and CLKN driven differentially
with a 2V
P-P
sinusoidal input signal, C
L
= 5pF at digital outputs, f
CLK
= 80MHz, T
A
= +25°C. All AC data based on a 32k-point FFT
record and under coherent sampling conditions.)