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MAX1284/MAX1285
400ksps/300ksps, Single-Supply, Low-Power,
Serial 12-Bit ADCs with Internal Reference
2
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—MAX1284
(VDD = +4.5V to +5.5V; fSCLK = 6.4MHz, 50% duty cycle, 16 clocks/conversion cycle (400ksps), 4.7F capacitor at REF, TA = TMIN to
TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
VDD to GND .............................................................-0.3V to +6V
AIN to GND................................................-0.3V to (VDD + 0.3V)
REF to GND ...............................................-0.3V to (VDD + 0.3V)
Digital Inputs to GND...............................................-0.3V to +6V
DOUT to GND............................................-0.3V to (VDD + 0.3V)
DOUT Current ..................................................................±25mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C) ..............471mW
Operating Temperature Ranges
MAX1284BCSA/MAX1285BCSA .......................0°C to +70°C
MAX1284BESA/MAX1285BESA .....................-40°C to +85°C
Storage Temperature Range............................-60°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Soldering Temperature (reflow) ......................................+260°C
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY (Note 1)
Resolution
12
Bits
Relative Accuracy (Note 2)
INL
±1.0
LSB
Differential Nonlinearity
DNL
No missing codes over temperature
±1.0
LSB
Offset Error
±6.0
LSB
Gain Error (Note 3)
±6.0
LSB
Gain-Error Temperature
Coefficient
±0.8
ppm/°C
DYNAMIC SPECIFICATIONS (100kHz sine wave, 2.5VP-P, clock = 6.4MHz)
Signal-to-Noise Plus Distortion
Ratio
SINAD
70
dB
Total Harmonic Distortion
THD
Up to the 5th harmonic
-80
dB
Spurious-Free Dynamic Range
SFDR
80
dB
Intermodulation Distortion
IMD
fIN1 = 99Hz, fIN2 = 102Hz
76
dB
Full-Power Bandwidth
-3dB point
6
MHz
Full-Linear Bandwidth
SINAD > 68dB
350
kHz
CONVERSION RATE
Conversion Time (Note 4)
tCONV
2.5
s
Track/Hold Acquisition Time
tACQ
468
ns
Aperture Delay
10
ns
Aperture Jitter
< 50
ps
Serial Clock Frequency
tSCLK
0.5
6.4
MHz
Duty Cycle
40
60
%
ANALOG INPUT (AIN)
Input Voltage Range
VAIN
0
2.5
V
Input Capacitance
18
pF
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