MAX1245
+2.375V, Low-Power, 8-Channel,
Serial 12-Bit ADC
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.375V to +3.3V, V
COM
= 0V, f
CLK
= 1.5MHz, external clock (50% duty cycle), 15 clocks/conversion cycle (100ksps),
VREF = 2.048V applied to VREF pin, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
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.
V
DD
to AGND, DGND .............................................. -0.3V to +6V
AGND to DGND.................................................... -0.3V to +0.3V
CH0–CH7, COM to AGND, DGND ............ -0.3V to (V
DD
+ 0.3V)
VREF to AGND........................................... -0.3V to (V
DD
+ 0.3V)
Digital Inputs to DGND............................................ -0.3V to +6V
Digital Outputs to DGND ........................... -0.3V to (V
DD
+ 0.3V)
Digital Output Sink Current .................................................25mA
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 11.11mW/°C above +70°C) ......... 889mW
SSOP (derate 8.00mW/°C above +70°C) ................... 640mW
CERDIP (derate 11.11mW/°C above +70°C).............. 889mW
Operating Temperature Ranges
MAX1245_C_P ................................................... 0°C to +70°C
MAX1245_E_P ................................................ -40°C to +85°C
Storage Temperature Range ............................ -60°C to +150°C
Lead Temperature (soldering, 10sec) ............................ +300°C
8
µs
35 65
t
CONV
Conversion Time (Note 5)
5.5 7.5
MHz1.0Full-Power Bandwidth
MHz2.25Small-Signal Bandwidth
dB-85Channel-to-Channel Crosstalk
dB76SFDRSpurious-Free Dynamic Range
dB-76THDTotal Harmonic Distortion
dB68SINADSignal-to-Noise + Distortion Ratio
LSB±0.2
Channel-to-Channel Offset
Matching
ppm/°C±0.25Gain Temperature Coefficient
±0.5
Bits12Resolution
LSBGain Error (Note 3) ±0.5 ±4
LSB
±1.0
INLRelative Accuracy (Note 2)
LSB±1DNL
LSB±0.5 ±4
UNITSMIN TYP MAXSYMBOLPARAMETER
External clock = 1.5MHz, 12 clocks/conversion
Internal clock, SHDN = V
DD
Internal clock, SHDN = open
MAX1245A
-3dB rolloff
50kHz, 2V
p-p
(Note 4)
Up to the 5th harmonic
MAX1245B
No missing codes over temperature
CONDITIONS
Differential Nonlinearity
ns40Aperture Delay
MHz
1.5
SHDN = open
ps<50Aperture Jitter
MHz
0.1 1.5
µs2.0t
ACQ
Track/Hold Acquisition Time External clock = 1.5MHz
0.225
Internal Clock Frequency
SHDN = V
DD
0 1.5
External Clock Frequency
Data transfer only
DC ACCURACY (Note 1)
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 0Vp-p to 2.048Vp-p, 100ksps, 1.5MHz external clock, bipolar input mode)
CONVERSION RATE
Offset Error
