User guide

MAX1124
1.8V, 10-Bit, 250Msps Analog-to-Digital Converter
with LVDS Outputs for Wideband Applications
_______________________________________________________________________________________ 5
-100
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-40
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-20
0
FFT PLOT (8192-POINT DATA RECORD,
COHERENT SAMPLING)
MAX1124 toc01
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
040608020 100 140120
f
SAMPLE
= 250.0057MHz
f
IN
= 11.5054MHz
A
IN
= -0.4795dBFS
SNR = 56.5dB
SFDR = 73.5dBc
HD2 = -82.4dBc
HD3 = -73.5dBc
HD2
HD3
-100
-80
-90
-60
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-40
-50
-30
-10
-20
0
FFT PLOT (8192-POINT DATA RECORD,
COHERENT SAMPLING)
MAX1124 toc02
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
040608020 100 140120
f
SAMPLE
= 250.0057MHz
f
IN
= 60.0294MHz
A
IN
= -0.4885dBFS
SNR = 56.4dB
SFDR = 74.6dBc
HD2 = -82.1dBc
HD3 = -75.6dBc
HD2
HD3
-100
-80
-90
-60
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-40
-50
-30
-10
-20
0
040608020 100 140120
FFT PLOT (8192-POINT DATA RECORD,
COHERENT SAMPLING)
MAX1124 toc03
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
f
SAMPLE
= 250.0057MHz
f
IN
= 183.5064MHz
A
IN
= -0.5335dBFS
SNR = 56dB
SFDR = 68.7dBc
HD2 = -78.1dBc
HD3 = -68.7dBc
HD2
HD3
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
FFT PLOT (8192-POINT DATA RECORD,
COHERENT SAMPLING)
MAX1124 toc04
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
040608020 100 140120
HD3
HD2
f
SAMPLE
= 250.0057MHz
f
IN
= 500.516MHz
A
IN
= -0.5155dBFS
SNR = 55.4dB
SFDR = 64.8dBc
HD2 = -69.9dBc
HD3 = -64.8dBc
FUNDAMENTAL
SNR vs. ANALOG INPUT FREQUENCY
(f
SAMPLE
= 250.0057MHz, A
IN
= -0.5dBFS)
MAX1124 toc05
f
IN
(MHz)
SNR (dB)
400300200100
51
52
55
53
57
54
56
58
50
0500
SFDR vs. ANALOG INPUT FREQUENCY
(f
SAMPLE
= 250.0057MHz, A
IN
= -0.5dBFS)
MAX1124 toc06
f
IN
(MHz)
SFDR (dBc)
400300200100
45
50
65
55
60
35
40
70
75
80
30
0500
HD2/HD3 vs. ANALOG INPUT FREQUENCY
(f
SAMPLE
= 250.0057MHz, A
IN
= -0.5dBFS)
MAX1124 toc07
f
IN
(MHz)
HD2/HD3 (dBc)
400300200100
-90
-80
-70
-60
-50
-100
0500
HD2
HD3
27
37
32
52
47
42
57
62
-28 -16 -12-24 -20 -8 -4 0
SNR vs. ANALOG INPUT AMPLITUDE
(f
SAMPLE
= 250.0057MHz, f
IN
= 60.0294MHz)
MAX1124 toc08
ANALOG INPUT AMPLITUDE (dBFS)
SNR (dB)
40
60
50
55
45
70
65
75
80
-28 -16 -12-24 -20 -8 -4 0
SFDR vs. ANALOG INPUT AMPLITUDE
(f
SAMPLE
= 250.0057MHz, f
IN
= 60.0294MHz)
MAX1124 toc09
ANALOG INPUT AMPLITUDE (dBFS)
SFDR (dBc)
Typical Operating Characteristics
(AV
CC
= OV
CC
= 1.8V, AGND = OGND = 0, f
SAMPLE
= 250.0057MHz, -0.5dBFS; see TOCs for detailed information on test condi-
tions, differential input drive, differential sine-wave clock input drive, 0.1µF capacitor on REFIO, internal reference, digital output pins
differential R
L
= 100Ω, T
A
= +25°C.)