Datasheet

MAX1421
12-Bit, 40Msps, 3.3V, Low-Power ADC
with Internal Reference
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
AVDD
= V
DVDD
= 3.3V, AGND = DGND = 0, V
IN
= ±1.024V, differential input voltage, f
CLK
= 40MHz (50% duty cycle), digital output
load C
L
= 10pF, T
A
= T
MIN
to T
MAX,
unless otherwise noted. Typical values are at T
A
= +25°C.)
-120
-80
-100
-40
-60
-20
0
024 1012141668 1820
TWO-TONE IMD, 8192-POINT RECORD,
DIFFERENTIAL INPUT
MAX1421 toc04
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dB)
f
IN1
= 11.51MHz
f
IN2
= 13.51MHz
A
IN1
= A
IN2
= -6.5dB FS
IM2
IM3
f
IN1
f
IN2
SIGNAL-TO-NOISE PLUS DISTORTION
vs. ANALOG INPUT FREQUENCY
ANALOG INPUT FREQUENCY (MHz)
SINAD (dB)
MAX1421 toc08
05101520 25 30 35 40 45 50 55
50
54
58
62
66
70
SPURIOUS-FREE DYNAMIC RANGE
vs. ANALOG INPUT POWER (f
IN
= 15MHz)
ANALOG INPUT POWER (dBFS)
SFDR (dBc)
MAX1421 toc09
-60 -50 -40 -30 -20 -10 0
20
30
40
50
60
70
80
TOTAL HARMONIC DISTORTION
vs. ANALOG INPUT POWER (f
IN
= 15MHz)
ANALOG INPUT POWER (dBFS)
THD (dBc)
MAX1421 toc11
-60 -50 -40 -30 -20 -10 0
-80
-70
-60
-50
-40
-30
SIGNAL-TO-NOISE PLUS DISTORTION
vs. ANALOG INPUT POWER (f
IN
= 15MHz)
ANALOG INPUT POWER (dBFS)
SINAD (dB)
MAX1421 toc12
-60 -50 -40 -30 -20 -10 0
0
10
20
30
40
50
60
70
80
TOTAL HARMONIC DISTORTION
vs. ANALOG INPUT FREQUENCY
ANALOG INPUT FREQUENCY (MHz)
THD (dBc)
MAX1421 toc07
051015 20 25 30 35 40 45 50 55
-80
-74
-68
-62
-56
-50
SIGNAL-TO-NOISE RATIO
vs. ANALOG INPUT POWER (f
IN
= 15MHz)
ANALOG INPUT POWER (dBFS)
SNR (dB)
MAX1421 toc10
-60 -50 -40 -30 -20 -10 0
0
10
20
30
40
50
60
70
80
SPURIOUS-FREE DYNAMIC RANGE
vs. ANALOG INPUT FREQUENCY
ANALOG INPUT FREQUENCY (MHz)
SFDR (dBc)
MAX1421 toc05
05101520 25 30 35 40 45 50 55
45
53
61
69
77
85
SIGNAL-TO-NOISE RATIO
vs. ANALOG INPUT FREQUENCY
ANALOG INPUT FREQUENCY (MHz)
SNR (dB)
MAX1421 toc06
05101520 25 30 35 40 45 50 55
50
54
58
62
66
70