MAX11644 Datasheet, PDF (6/21 Pages) Maxim Integrated Products – 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 1-/2-Channel, 2-Wire Serial, 12-Bit ADCs

2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
1-/2-Channel, 2-Wire Serial, 12-Bit ADCs
Typical Operating Characteristics
(V_DD = 3.3V (MAX11645), V_DD = 5V (MAX11644), f_SCL = 1.7MHz, 50% duty cycle, f_SAMPLE = 94.4ksps, single-ended, unipolar,
T_A = +25°C, unless otherwise noted.)
DIFFERENTIAL NONLINEARITY
INTEGRAL NONLINEARITY
vs. DIGITAL CODE
vs. DIGITAL CODE
0.5
1.0
-20
0.4
0.8
0.3
0.6
-40
0.2
0.4
0.1
-60
0.2
FFT PLOT
f_SAMPLE = 94.4ksps
f_IN = 10kHz
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
500 1000 1500 2000 2500 3000 3500 4000
DIGITAL OUTPUT CODE
0
-0.2
-0.4
-0.6
-0.8
-1.0
0 500 1000 1500 2000 2500 3000 3500 4000
DIGITAL OUTPUT CODE
-80
-100
-120
-140
0
10k 20k 30k 40k 50k
FREQUENCY (Hz)
SUPPLY CURRENT
vs. TEMPERATURE
800
INTERNAL REFERENCE MAX11644
750
700
SETUP BYTE
650
EXT REF: 10111011
INT REF: 11011011
600
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
0.6
SDA = SCL = V_DD
0.5
0.4
550 INTERNAL REFERENCE MAX11645
0.3
500
450 ^{EXTERNAL REFERENCE MAX11644}
0.2
400
0.1
350 EXTERNAL REFERENCE MAX11645
300
-40 -25 -10 5 20 35 50 65 80
TEMPERATURE (°C)
0
2.7 3.2 3.7 4.2 4.7 5.2
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
0.50
0.45
MAX11644
0.40
0.35
0.30
0.25
0.20 ^MAX11645
0.15
0.10
0.05
0
-40 -25 -10 5 20 35 50 65 80
TEMPERATURE (°C)
ANALOG SUPPLY CURRENT vs.
CONVERSION RATE (EXTERNAL CLOCK)
1000
900 INTERNAL REFERENCE ALWAYS ON
800
700
600
500
400
300
200
EXTERNAL REFERENCE
100
0
0
20
40
60
80 100
CONVERSION RATE (ksps)
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