Typical operating characteristics (continued) – Rainbow Electronics MAX1121 User Manual
Page 7
MAX1121
1.8V, 8-Bit, 250Msps Analog-to-Digital Converter
with LVDS Outputs for Wideband Applications
_______________________________________________________________________________________
7
SINAD vs. TEMPERATURE (f
IN
= 65.0108MHz,
f
SAMPLE
= 249.856MHz, A
IN
= -0.5dBFS)
TEMPERATURE (°C)
SINAD (dB)
60
35
10
-15
50.0
49.5
49.0
48.5
48.0
47.5
47.0
46.5
46.0
-40
85
MAX1121 toc19
SFDR vs. TEMPERATURE (f
IN
= 65.0108MHz,
f
SAMPLE
= 249.856MHz, A
IN
= -0.5dBFS)
TEMPERATURE (°C)
SFDR (dBc)
60
35
10
-15
55
60
65
70
MAX1121 toc20
75
50
-40
85
POWER DISSIPATION vs. f
SAMPLE
(f
IN
= 60.0294MHz, A
IN
= -0.5dBFS)
f
SAMPLE
(MHz)
P
DISS
(mW)
180
140
100
60
420
410
440
430
460
450
470
480
490
400
20
260
220
MAX1121 toc21
RESISTOR VALUE APPLIED
BETWEEN REFADJ AND AGND
RESISTOR VALUE APPLIED
BETWEEN REFADJ AND REFIO
FIGURE 6
FS VOLTAGE vs. FS ADJUST RESISTOR
MAX1121 toc22
FS ADJUST RESISTOR (Ω)
V
FS
(V)
900
800
600 700
200 300 400 500
100
1.18
1.20
1.22
1.24
1.26
1.28
1.30
1.32
1.34
1.16
0
1000
SNR vs. SUPPLY VOLTAGE
(f
IN
= 60.0294MHz, A
IN
= -0.5dBFS)
SUPPLY VOLTAGE (V)
SNR
(dB)
2.0
1.9
1.8
1.7
1.6
MAX1121 toc23
50
49
48
47
46
45
44
43
1.5
2.1
AV
CC
= OV
CC
INTERNAL REFERENCE vs. SUPPLY VOLTAGE
(f
SAMPLE
= 250.0057MHz)
MAX1121 toc24
SUPPLY VOLTAGE (V)
V
REFIO
(V)
2.0
1.9
1.8
1.7
1.6
1.2310
1.2320
1.2330
1.2340
1.2350
1.2300
1.5
2.1
MEASURED AT THE REFIO PIN
REFADJ = AV
CC
= OV
CC
0.0E+00
4.0E+04
1.2E+05
8.0E+04
1.6E+05
2.0E+05
126
127
128
NOISE HISTOGRAM
(DC INPUT, 256k-POINT DATA RECORD)
DIGITAL OUTPUT NOISE
CODE COUNTS
0
0
MAX1121 toc25
f
SAMPLE
= 250MHz
131072
t
CPDL
t
PDL
PROPAGATION DELAY TIMES
vs. TEMPERATURE
MAX1121 toc26
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
60
35
10
-15
1
2
3
4
5
6
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.)
46.0
49.5
48.5
48.0
49.0
47.0
46.5
47.5
50.0
10
40
50
20
30
60
70
80
90
SINAD vs. CLOCK DUTY CYCLE (f
IN
= 1.8148MHz,
f
SAMPLE
= 249.856MHz, A
IN
= -0.5dBFS)
CLOCK DUTY CYCLE (%)
SINAD (dB)
MAX1121 toc27