Datasheet

MAX1270/MAX1271
Multirange, +5V, 8-Channel,
Serial 12-Bit ADCs
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +5.0V ±5%; unipolar/bipolar range; external reference mode, V
REF
= +4.096V; 4.7µF at REF; external clock; f
CLK
= 2.0MHz,
50% duty cycle (MAX127_B); f
CLK
= 1.8MHz, 50% duty cycle (MAX127_A); 18 clock/conversion cycle, T
A
= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are 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 AGND............................................................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
CH0–CH7 to AGND ......................................................... ±16.5V
REF, REFADJ to AGND ..............................-0.3V to (V
DD
+ 0.3V)
SSTRB, DOUT to DGND.............................-0.3V to (V
DD
+ 0.3V)
SHDN, CS, DIN, SCLK to DGND..............................-0.3V to +6V
Max Current into Any Pin ....................................................50mA
Continuous Power Dissipation (T
A
= +70°C)
24-Pin Narrow DIP (derate 13.33mW/°C above +70°C)..1067mW
28-Pin SSOP (derate 9.52mW/°C above +70°C) ..........762mW
Operating Temperature Ranges
MAX127_C_ _......................................................0°C to +70°C
MAX127_E_ _......................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
ACCURACY (Note 1)
Resolution 12 Bits
MAX127_A
±0.5
Integral Nonlinearity INL
MAX127_B
±1.0
LSB
Differential Nonlinearity DNL No missing codes over temperature ±1 LSB
MAX127_A ±3
Unipolar
MAX127_B ±5
MAX127_A ±5
Offset Error
Bipolar
MAX127_B ±10
LSB
Unipolar
±0.1
Channel-to-Channel Offset Error
Matching
Bipolar
±0.3
LSB
MAX127_A ±7
Unipolar
MAX127_B ±10
MAX127_A ±7
Gain Error (Note 2)
Bipolar
MAX127_B ±10
LSB
Unipolar, external reference ±3
Gain Error Temperature
Coefficient (Note 2)
Bipolar, external reference ±5
ppm/°C
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, ±10V
P-P
(MAX1270), or ±4.096V
P-P
(MAX1271), f
SAMPLE
= 110ksps
(MAX127_B), f
SAMPLE
= 100ksps (MAX127_A))
Signal-to-Noise + Distortion Ratio
SINAD 70 dB
Total Harmonic Distortion THD Up to the 5th harmonic -87 -78 dB
Spurious-Free Dynamic Range SFDR 80 dB
50kHz (Note 3) -86
Channel-to-Channel Crosstalk
DC, V
IN
= ±16.5V -96
dB
Aperture Delay External clock mode 15 ns
External clock mode
<50
ps
Aperture Jitter
Internal clock mode 10 ns