MAX1144-MAX1145 Datasheet, PDF (5/18 Pages) Maxim Integrated Products – 14-Bit ADCs, 150ksps, 3.3V Single Supply

14-Bit ADCs, 150ksps, 3.3V Single Supply
TIMING CHARACTERISTICS (Figures 5 and 6) (continued)
(AV_DD = DV_DD = 3.3V ±5%, T_A = T_MIN to T_MAX, unless otherwise noted.)
Note 1: Tested at AV_DD = DV_DD = 3.3V, bipolar input mode.
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the gain error and offset
error have been nullified.
Note 3: Offset nullified.
Note 4: Conversion time is defined as the number of clock cycles multiplied by the clock period; clock has 50% duty cycle. Includes
the acquisition time.
Note 5: Acquisition time is 5 clock cycles in short acquisition mode and 13 clock cycles in long acquisition mode.
Note 6: Performance is limited by the converter’s noise floor, typically 300µV_P-P.
Note 7: When an external reference has a different voltage than the specified typical value, the full scale of the ADC scales propor-
tionally.
Note 8: Defined as the change in positive full scale caused by a ±5% variation in the nominal supply voltage.
Typical Operating Characteristics
(MAX1144/MAX1145, AV_DD = DV_DD = 3.3V, f_SCLK = 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps),
bipolar input, REF = 2.048V, 4.7µF on REF, 1µF on CREF, T_A = +25°C, unless otherwise noted.)
INTEGRAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
1
3413 6825 10237 13649
1707 5119 8531 11943 15355
DIGITAL OUTPUT CODE
DIFFERENTIAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
1
3413 6825 10237 13649
1707 5119 8531 11943 15355
DIGITAL OUTPUT CODE
TOTAL SUPPLY CURRENT
vs. TEMPERATURE
9.0
A: AV_DD, DV_DD = 3.135V
8.9 _{B: AVDD, DVDD = 3.3V}
8.8 ^{C: AVDD, DVDD = 3.465V}
8.7
C
8.6
8.5
B
8.4
8.3
A
8.2
8.1
8.0
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
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