Rainbow Electronics MAX1121 - Manual (Page 6)

MAX1121
1.8V, 8-Bit, 250Msps Analog-to-Digital Converter
with LVDS Outputs for Wideband Applications
6 _______________________________________________________________________________________
-90
-65
-75
-85
-70
-80
-50
-55
-60
-40
-45
-35
-30
-30 -20 -15 -25 -10 -5 0
HD2/HD3 vs. ANALOG INPUT AMPLITUDE
(f SAMPLE = 250.0057MHz, f IN = 60.0294MHz)
MAX1121 toc10
ANALOG INPUT AMPLITUDE (dBFS)
HD2/HD3 (dBc)
HD3
HD2
SNR vs. f SAMPLE
(f IN = 60.0294MHz, A IN = -0.5dBFS)
MAX1121 toc11
f SAMPLE (MHz)
SNR (dB)
60
47.0
47.5
48.0
48.5
49.0
46.5
20 260 180 140 100 220
SFDR vs. f SAMPLE
(f IN = 60.0294MHz, A IN = -0.5dBFS)
MAX1121 toc12
f SAMPLE (MHz)
SFDR (dBc)
220 140 100 60
50
60
70
80
90
40
20 260 180
HD2/HD3 vs. f SAMPLE
(f IN = 60.03294MHz, A IN = -0.5dBFS)
MAX1121 toc13
f SAMPLE (MHz)
HD2/HD3 (dBc)
220 180 140 100 60
-92
-84
-76
-68
-60
-100
20 260
HD3
HD2
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
TWO-TONE IMD PLOT (8192-POINT
DATA RECORD, COHERENT SAMPLING)
MAX1121 toc14
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
0 40 60 80 20 100 140 120
f SAMPLE = 250.0057MHz
f IN1 = 99.0318MHz
f IN2 = 101.046MHz
A IN1 = A IN2 = -7dBFS
IMD = -70dBc
2f IN1 - f IN2
2f IN2 -
f IN1
f
IN1
f IN2
-0.5
-0.3
-0.4
-0.1
-0.2
0.1
0
0.2
0.4
0.3
0.5
64 96 32 0 128 160 192 224 256
INTEGRAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
MAX1121 toc15
DIGITAL OUTPUT CODE
INL (LSB)
-0.5
-0.4
-0.2
0.1
0.3
0.5
0.4
0
-0.3
-0.1
0.2
64 96 32 0 128 160 192 224 256
DIFFERENTIAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
MAX1121 toc16
DIGITAL OUTPUT CODE
DNL (LSB)
2
0
-2
-4
-6
-8
-10
-12
10 100 1000
GAIN BANDWIDTH PLOT
(f SAMPLE = 250.0057MHz, A IN = -0.5dBFS)
MAX1121 toc17
ANALOG INPUT FREQUENCY (MHz)
GAIN (dB)
SNR vs. TEMPERATURE (f IN = 65.0108MHz,
f SAMPLE = 249.856MHz, A IN = -0.5dBFS)
MAX1121 toc18
TEMPERATURE (°C)
SNR (dB)
60 35 10 -15
47.0
46.5
48.0
47.5
49.0
48.5
49.5
50.0
46.0
-40 85
Typical Operating Characteristics (continued)
(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.)