MAX1421 Maxim, MAX1421 Datasheet - Page 5

• Manufacturer Part Number: MAX1421
• Description: 12-Bit / 40Msps / +3.3V / Low-Power ADC with Internal Reference
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
f
T
Note 1: Internal reference, REFIN bypassed to AGND with a combination of 0.22µF in parallel with 1nF capacitor.
Note 2: External +2.048V reference applied to REFIN.
Note 3: Internal reference disabled. V
Note 4: IMD is measured with respect to either of the fundamental tones.
Note 5: Specifies the common-mode range of the differential input signal supplied to the MAX1421.
Note 6: V
Note 7: Input bandwidth is measured at a 3dB level.
Note 8: V
Note 9: Measured as the ratio of the change in mid-scale offset voltage for a ± 5% change in V
(V
load C
CLK
A
Pipeline Delay (Latency)
Aperture Delay
Aperture Jitter
Data Output Delay
Bus Enable Time
Bus Disable Time
AVDD
AVDD
-100
-120
= +25°C.)
-20
-40
-60
-80
0
= 40MHz (50% duty cycle), digital output load C
L
0
= V
= 10pF, T
f
A
= V
IN
IN
FFT PLOT, 4096-POINT RECORD,
DIFF
REFIN
= 7.5439934MHz
= -0.45dB FS
PARAMETER
DVDD
ANALOG INPUT FREQUENCY (MHz)
DVDD
= V
DIFFERENTIAL INPUT
5
is internally biased to +2.048V through a 10kΩ resistor.
= +3.3V, AGND = DGND = 0, V
A
REFP
= +3.3V, AGND = DGND = 0, V
= T
_______________________________________________________________________________________
10
MIN
- V
12-Bit, 40Msps, +3.3V, Low-Power ADC
REFN
to T
HD2
MAX,
15
unless otherwise noted. Typical values are at T
HD3
SYMBOL
REFIN
20
t
t
t
t
t
OD
AD
BD
AJ
BE
= 0, V
-100
-120
IN
-20
-40
-60
-80
Figure 5
Figure 9
Figure 9
Figure 5
Figure 4
Figure 4
0
REFP
= ±1.024V, differential input voltage, f
0
f
A
IN
IN
IN
L
FFT PLOT, 4096-POINT RECORD,
= +2.162V, V
= 19.9047628MHz
HD2
= -0.50dB FS
≈ 10pF, T
= ±1.024V, differential input voltage at -0.5dB FS, internal reference,
ANALOG INPUT FREQUENCY (MHz)
DIFFERENTIAL INPUT
5
CONDITIONS
with Internal Reference
A
10
CML
= T
Typical Operating Characteristics
MIN
= +1.65V, and V
15
to T
HD3
MAX
A
= +25°C.)
20
, unless otherwise noted. Typical values are at
CLK
REFN
-100
-120
= 40MHz (50% duty cycle), digital output
-20
-40
-60
-80
0
= +1.138V.
AVDD
0
MIN
FFT PLOT, 4096-POINT RECORD,
5
using the internal reference.
ANALOG INPUT FREQUENCY (MHz)
DIFFERENTIAL INPUT
5
HD2
HD3
TYP
10
7
2
2
5
5
10
f
A
IN
IN
= 38.5440183MHz
= -0.49dB FS
MAX
14
15
UNITS
cycles
f
CLK
ps
ns
ns
ns
ns
20
5