Datasheet

MAX144/MAX145
+2.7V, Low-Power, 2-Channel, 108ksps,
Serial 12-Bit ADCs in 8-Pin µMAX
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.25V, V
REF
= 2.5V, 0.1µF capacitor at REF, f
SCLK
= 2.17MHz, 16 clocks/conversion cycle (108ksps),
CH- = GND for MAX145, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
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 GND..............................................................-0.3V to +6V
CH0, CH1 (CH+, CH-) to GND ................. -0.3V to (V
DD
+ 0.3V)
REF to GND .............................................. -0.3V to (V
DD
+ 0.3V)
Digital Inputs to GND. ............................................. -0.3V to +6V
DOUT to GND............................................ -0.3V to (V
DD
+ 0.3V)
DOUT Sink Current ........................................................... 25mA
Continuous Power Dissipation (T
A
= +70°C)
µMAX (derate 4.1mW/°C above +70°C) .................... 330mW
Plastic DIP (derate 9.09mW/°C above +70°C) ............727mW
CERDIP (derate 8.00mW/°C above +70°C) ............... 640mW
Operating Temperature Ranges (T
A
)
MAX144/MAX145_C_A .......................................0°C to +70°C
MAX144/MAX145_E_A. ...................................-40°C to +85°C
MAX144/MAX145_M_A ................................ -55°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
MAX14_A
MAX14_B
No missing codes over temperature
CONDITIONS
LSB
±0.5
INLRelative Accuracy (Note 2)
Bits
12
RESResolution
±1
LSB±0.75DNLDifferential Nonlinearity
UNITSMIN TYP MAXSYMBOLPARAMETER
ppm/°C±0.8Gain Temperature Coefficient
LSB±3
LSB±3Offset Error
Gain Error
LSB±0.05
Channel-to-Channel Offset
Matching
LSB±0.05
Channel-to-Channel Gain
Matching
-3dB rolloff
f
IN
= 65kHz, V
IN
= 2.5Vp-p (Note 4)
External clock, f
SCLK
= 2.17MHz,
16 clocks/conversion cycle
MHz1.0Full-Power Bandwidth
MHz2.25
dB-85Channel-to-Channel Crosstalk
Small-Signal Bandwidth
µs
7.4
t
CONV
Conversion Time (Note 5)
Total Harmonic Distortion
(including 5th-order harmonic)
dB70SINAD
Signal-to-Noise Plus
Distortion Ratio
dB-80THD
dB80SFDRSpurious-Free Dynamic Range
Internal clock mode, for data transfer only
External clock mode
Internal clock
05
MHz
0.1 2.17
f
SCLK
ps<50Aperture Jitter
Serial Clock Frequency
57
µs2.5t
ACQ
T/H Acquisition Time
ns25Aperture Delay
DC ACCURACY (Note 1)
DYNAMIC SPECIFICATIONS (f
IN(sine-wave)
= 10kHz, V
IN
= 2.5Vp-p, 108ksps, f
SCLK
= 2.17MHz, CH- = GND for MAX145)
CONVERSION RATE
(Note 3)