Datasheet

MAX1246/MAX1247
+2.7V, Low-Power, 4-Channel,
Serial 12-Bit ADCs in QSOP-16
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +3.6V (MAX1246); V
DD
= +2.7V to +5.25V (MAX1247); COM = 0V; f
SCLK
= 2.0MHz; external clock (50% duty cycle);
15 clocks/conversion cycle (133ksps); MAX1246—4.7µF capacitor at VREF pin; MAX1247—external reference, VREF = 2.5V 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–CH3, 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 10.53mW/°C above +70°C) ......... 842mW
QSOP (derate 8.36mW/°C above +70°C)................... 667mW
CERDIP (derate 10.00mW/°C above +70°C).............. 800mW
Operating Temperature Ranges
MAX1246_C_E/MAX1247_C_E .......................... 0°C to +70°C
MAX1246_E_E/MAX1247_E_E........................ -40°C to +85°C
MAX1246_MJE/MAX1247_MJE .................... -55°C to +125°C
Storage Temperature Range ............................ -60°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY (Note 1)
Resolution 12 Bits
MAX124_A
±0.5
MAX124_B
±1.0
Relative Accuracy (Note 2) INL
MAX1247C
±2.0
LSB
No Missing Codes NMC 12 Bits
MAX124_A/MAX124_B ±1
Differential Nonlinearity DNL
MAX124_C
±0.8
LSB
MAX124_A
±0.5
±3
Offset Error
MAX124_B
±0.5
±4
LSB
Gain Error (Note 3)
±0.5
±4 LSB
Gain Temperature Coefficient
±0.25
ppm/°C
Channel-to-Channel Offset
Matching
±0.25
LSB
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 0V to 2.500Vp-p, 133ksps, 2.0MHz external clock, bipolar input mode)
MAX124_A/MAX124_B 70 73
Signal-to-Noise + Distortion
Ratio
SINAD
MAX1247C 73
dB
MAX124_A/MAX124_B -88 -80
Total Harmonic Distortion THD
Up to the 5th
harmonic
MAX1247C -88
dB
MAX124_A/MAX124_B 80 90
Spurious-Free Dynamic Range SFDR
MAX1247C 90
dB
Channel-to-Channel Crosstalk 65kHz, 2.500V
P-P
(Note 4) -85 dB
Small-Signal Bandwidth -3dB rolloff
2.25
MHz
Full-Power Bandwidth 1.0 MHz