Datasheet

MAX1444
10-Bit, 40Msps, 3.0V, Low-Power
ADC with Internal Reference
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3V; OV
DD
= 2.7V; 0.1µF and 1µF capacitors from REFP, REFN, and COM to GND; V
REFIN
= 2.048V; REFOUT connected to
REFIN through a 10kΩ resistor; V
IN
= 2V
P-P
(differential with respect to COM); C
L
= 10pF at digital outputs; f
CLK
= 40MHz; T
A
= T
MIN
to T
MAX
, unless otherwise noted. ≥ +25°C guaranteed by production test, < +25°C guaranteed by design and characterization; typi-
cal values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS MIN TYP MAX
UNITS
f
IN
= 7.51MHz -75
f
IN
= 19.91MHz -74
Third-Harmonic Distortion HD3
f
IN
= 39.9MHz (Note 1) -72.5
dBc
Two-Tone Intermodulation
Distortion
IMD
f
1
= 11.5MHz at -6.5dBFS
f
2
= 13.5MHz at -6.5dBFS
(Note 2)
-76 dBc
Third-Order Intermodulation
Distortion
IM3
f
1
= 11.5MHz at -6.5dBFS
f
2
= 13.5MHz at -6.5dBFS
(Note 2)
-76 dBc
f
IN
= 7.51MHz -73.8 -65
f
IN
= 19.91MHz -72.2 -65
Total Harmonic Distortion
(First 4 Harmonics)
THD
f
IN
= 39.9MHz (Note 1) -70
dBc
Small-Signal Bandwidth Input at -20dBFS, differential inputs 500 MHz
Full-Power Bandwidth FPBW Input at -0.5dBFS, differential inputs 400 MHz
Aperture Delay t
AD
1ns
Aperture Jitter t
AJ
2
ps
RMS
Overdrive Recovery Time For 1.5 × full-scale input 2 ns
Differential Gain ±1%
Differential Phase
±0.25
Degrees
Output Noise IN+ = IN- = COM 0.2
LS B
RM S
INTERNAL REFERENCE
Reference Output Voltage
REFOUT
2.048 ±1% V
Reference Temperature
Coefficient
TC
REF
60
p p m/°C
Load Regulation 1.25
mV/mA
BUFFERED EXTERNAL REFERENCE (V
REFIN
= 2.048V)
REFIN Input Voltage
V
REFIN
2.048
V
Positive Reference Output
Voltage
V
REFP
2.012
V
Negative Reference Output
Voltage
V
REFN
0.988
V
Common-Mode Level V
COM
V
DD
/ 2
V
Differential Reference Output
Voltage Range
ΔV
REF
ΔV
REF
= V
REFP
- V
REFN
, T
A
≥ +25°C 0.98
1.024
1.07 V
REFIN Resistance
R
REFIN
>50 MΩ