MAX1239EEE-T Datasheet, PDF (6/22 Pages) Maxim Integrated Products – 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs

2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel, 2-Wire Serial, 12-Bit ADCs
TIMING CHARACTERISTICS (Figure 1) (continued)
(V_DD = 2.7V to 3.6V (MAX1237/MAX1239), V_DD = 4.5V to 5.5V (MAX1236/MAX1238), V_REF = 2.048V (MAX1237/MAX1239), V_REF =
4.096V (MAX1236/MAX1238), f_SCL = 1.7MHz, T_A = T_MIN to T_MAX, unless otherwise noted. Typical values are at
T_A = +25°C, see Tables 1–5 for programming notation.)
and for the MAX1236/MAX1238 where N is the number of bits.
[ ] ^⎡
⎢ V_FS(5.5V) − V_FS(4.5V)
⎣⎢
×
2^N −
1^⎤
⎥
V_{REF ⎦⎥}
(5.5V − 4.5V)
Note 10: A master device must provide a data hold time for SDA (referred to V_IL of SCL) in order to bridge the undefined region of
SCL’s falling edge (see Figure 1).
Note 11: The minimum value is specified at +25°C.
Note 12: C_B = total capacitance of one bus line in pF.
Note 13: f_SCL must meet the minimum clock low time plus the rise/fall times.
Typical Operating Characteristics
(V_DD = 3.3V (MAX1237/MAX1239), V_DD = 5V (MAX1236/MAX1238), f_SCL = 1.7MHz, (50% duty cycle), f_SAMPLE = 94.4ksps, single-
ended, unipolar, T_A = +25°C, unless otherwise noted.)
DIFFERENTIAL NONLINEARITY
vs. DIGITAL CODE
0.5
0.4
0.3
0.2
0.1
0
0.1
-0.2
-0.3
-0.4
-0.5
0
500 1000 1500 2000 2500 3000 3500 4000
DIGITAL OUTPUT CODE
INTEGRAL NONLINEARITY
vs. DIGITAL CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0 500 1000 1500 2000 2500 3000 3500 4000
DIGITAL OUTPUT CODE
FFT PLOT
-60
f_SAMPLE = 94.4ksps
f_IN = 10kHz
-80
-100
-120
-140
-160
-180
0
10k 20k 30k 40k 50k
FREQUENCY (Hz)
SUPPLY CURRENT vs. TEMPERATURE
800
750 INTERNAL REFERENCE MAX1238/MAX1236
700
SETUP BYTE
650
EXT REF: 10111011
INT REF: 11011011
600
550 INTERNAL REFERENCE MAX1239/MAX1237
500
450 ^{EXTERNAL REFERENCE MAX1238/MAX1236}
400
350 _{EXTERNAL REFERENCE MAX1239/MAX1237}
300
-40 -25 -10 5 20 35 50 65 80
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
0.6
SDA = SCL = V_DD
0.5
0.4
0.3
0.2
0.1
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
0.40 ^MAX1238
0.35
0.30
0.25
0.20 ^MAX1239
0.15
0.10
0.05
0
-40 -25 -10 5 20 35 50 65 80
TEMPERATURE (°C)
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