MAX1121 Datasheet, PDF (7/17 Pages) Maxim Integrated Products – 1.8V, 8-Bit, 250Msps Analog-to-Digital Converter with LVDS Outputs for Wideband Applications

1.8V, 8-Bit, 250Msps Analog-to-Digital Converter
with LVDS Outputs for Wideband Applications
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.)
SINAD vs. TEMPERATURE (f_IN = 65.0108MHz,
f_SAMPLE = 249.856MHz, A_IN = -0.5dBFS)
50.0
SFDR vs. TEMPERATURE (f_IN = 65.0108MHz,
f_SAMPLE = 249.856MHz, A_IN = -0.5dBFS)
75
POWER DISSIPATION vs. f_SAMPLE
(f_IN = 60.0294MHz, A_IN = -0.5dBFS)
490
49.5
480
70
49.0
470
460
48.5
65
450
48.0
440
47.5
60
430
47.0
55
420
46.5
410
46.0
-40 -15
10
35
60
85
TEMPERATURE (^°C)
FS VOLTAGE vs. FS ADJUST RESISTOR
1.34
FIGURE 6
1.32
1.30
1.28
RESISTOR VALUE APPLIED
BETWEEN REFADJ AND AGND
1.26
50
-40 -15
10
35
60
85
TEMPERATURE (^°C)
SNR vs. SUPPLY VOLTAGE
(f_IN = 60.0294MHz, A_IN = -0.5dBFS)
50
AV_CC = OV_CC
49
48
47
400
20
60 100 140 180 220 260
f_SAMPLE (MHz)
INTERNAL REFERENCE vs. SUPPLY VOLTAGE
(f_SAMPLE = 250.0057MHz)
1.2350
MEASURED AT THE REFIO PIN
REFADJ = AV_CC = OV_CC
1.2340
1.2330
1.24
1.22
RESISTOR VALUE APPLIED
1.20
BETWEEN REFADJ AND REFIO
1.18
1.16
0 100 200 300 400 500 600 700 800 900 1000
FS ADJUST RESISTOR (Ω)
46
45
44
43
1.5 1.6 1.7 1.8 1.9 2.0 2.1
SUPPLY VOLTAGE (V)
1.2320
1.2310
1.2300
1.5 1.6 1.7 1.8 1.9 2.0 2.1
SUPPLY VOLTAGE (V)
NOISE HISTOGRAM
(DC INPUT, 256k-POINT DATA RECORD)
2.0E+05
f_SAMPLE = 250MHz
1.6E+05
1.2E+05
131072
8.0E+04
4.0E+04
0.0E+00
0
0
126
127
128
DIGITAL OUTPUT NOISE
PROPAGATION DELAY TIMES
vs. TEMPERATURE
6
5
4
t_CPDL
3
2
1
t_PDL
0
-40 -15 10
35
60
85
TEMPERATURE (^°C)
SINAD vs. CLOCK DUTY CYCLE (f_IN = 1.8148MHz,
f_SAMPLE = 249.856MHz, A_IN = -0.5dBFS)
50.0
49.5
49.0
48.5
48.0
47.5
47.0
46.5
46.0
10 20 30 40 50 60 70 80 90
CLOCK DUTY CYCLE (%)
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