Datasheet

MAX146/MAX147
+2.7V, Low-Power, 8-Channel,
Serial 12-Bit ADCs
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +3.6V (MAX146); V
DD
= +2.7V to +5.25V (MAX147); COM = 0; f
SCLK
= 2.0MHz; external clock (50% duty cycle); 15
clocks/conversion cycle (133ksps); MAX146—4.7µF capacitor at VREF pin; MAX147—external reference, VREF = 2.500V 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, REFADJ 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
MAX146_C_P/MAX147_C_P .............................. 0°C to +70°C
MAX146_E_P/MAX147_E_P............................ -40°C to +85°C
MAX146_MJP/MAX147_MJP ........................ -55°C to +125°C
Storage Temperature Range ............................ -60°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
Relative Accuracy (Note 2)
6
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
80 90
-88 -80
70 73
LSB±0.25
Channel-to-Channel Offset
Matching
ppm/°C±0.25Gain Temperature Coefficient
±0.5
Bits12Resolution
LSBGain Error (Note 3) ±0.5 ±4
Offset Error
±1.0
LSB
±2.0
INL
±0.5 ±3
LSB
±0.5 ±4
UNITSMIN TYP MAXSYMBOLPARAMETER
External clock = 2MHz, 12 clocks/conversion
Internal clock, SHDN = V
DD
Internal clock, SHDN = FLOAT
MAX14_A
-3dB rolloff
65kHz, 2.500V
p-p
(Note 4)
MAX14_A/MAX14_B
MAX14_A/MAX14_B
MAX14_B
MAX147C
MAX14_A
MAX14_B/MAX147C
CONDITIONS
±1.0MAX14_A/MAX14_B
Differential Nonlinearity LSB
±0.8
DNL
MAX147C
No Missing Codes Bits12NMC
dB
73
SINADSignal-to-Noise + Distortion Ratio
MAX147C
dB
-88
THDTotal Harmonic Distortion
Up to the 5th
harmonic
MAX14_A/MAX14_B
MAX147C
dB
90
SFDRSpurious-Free Dynamic Range
MAX147C
DC ACCURACY (Note 1
)
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 0V to 2.500Vp-p, 133ksps, 2.0MHz external clock, bipolar input mode)
CONVERSION RATE