Datasheet
MAX1136–MAX1139
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel, 2-Wire Serial 10-Bit ADCs
6 _______________________________________________________________________________________
Typical Operating Characteristics
(V
DD
= 3.3V (MAX1137/MAX1139), V
DD
= 5V (MAX1136/MAX1138), f
SCL
= 1.7MHz, external clock, f
SAMPLE
= 94.4ksps, single-
ended, unipolar, T
A
= +25°C, unless otherwise noted.)
-0.3
-0.1
-0.2
0.1
0
0.2
0.3
0 1000
DIFFERENTIAL NONLINEARITY
vs. DIGITAL CODE
MAX1136 toc01
DIGITAL OUTPUT CODE
DNL (LSB)
400200 600 800
-0.5
-0.2
-0.3
-0.4
-0.1
0
0.1
0.2
0.3
0.4
0.5
0 400200 600 800 1000
INTEGRAL NONLINEARITY
vs. DIGITAL CODE
MAX1136 toc02
DIGITAL OUTPUT CODE
INL (LSB)
-160
-140
-120
-100
-80
-60
-40
-20
0
0 10k 20k 30k 40k 50k
FFT PLOT
MAX1136 toc03
FREQUENCY (Hz)
AMPLITUDE (dBc)
f
SAMPLE
= 94.4ksps
f
IN
= 10kHz
300
400
350
500
450
600
550
650
750
700
800
-40 -10 5-25 20 35 50 65 80
SUPPLY CURRENT vs. TEMPERATURE
MAX1136 toc04
TEMPERATURE (
°
C)
SUPPLY CURRENT (µA)
INTERNAL REFERENCE
MAX1138/1136
MAX1139/1137
MAX1138/1136
MAX1139/1137
INTERNAL REFERENCE
EXTERNAL REFERENCE
EXTERNAL REFERENCE
SETUP BYTE
EXT REF: 10111011
INT REF: 11011011
0
0.2
0.1
0.4
0.3
0.5
0.6
2.7 5.2
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1136 toc05
INPUT VOLTAGE (V)
I
DD
(µA)
3.73.2 4.2 4.7
SDA = SCL = V
DD
0
0.10
0.05
0.20
0.15
0.30
0.25
0.35
0.45
0.40
0.50
-40 -10 5
-25
20 35 50 65 80
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX1136 toc06
TEMPERATURE (
°
C)
SUPPLY CURRENT (µA)
MAX1138
MAX1139
200
300
250
350
400
450
500
550
600
650
700
750
800
0 20 30 40 60 80 100
AVERAGE SUPPLY CURRENT vs.
CONVERSION RATE (EXTERNAL CLOCK)
MAX1136 toc07
CONVERSION RATE (ksps)
AVERAGE I
DD
(µA)
010 50 70 90
A
B
A) INTERNAL REFERENCE ALWAYS ON
B) EXTERNAL REFERENCE
MAX1138
0.9990
0.9994
0.9992
0.9998
0.9996
1.0002
1.0000
1.0004
1.0008
1.0006
1.0010
-40 -10 5-25 20 35 50 65 80
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1136 toc08
TEMPERATURE (°C)
V
REF
NORMALIZED
MAX1138
MAX1139
NORMALIZED TO REFERENCE VALUE
AT +25
°
C
0.99990
0.99994
0.99992
0.99998
0.99996
1.00002
1.00000
1.00004
1.00008
1.00006
1.00010
2.7 3.3 3.6 3.93.0 4.2 4.5 4.8 5.1 5.4
NORMALIZED REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
MAX1136 toc09
V
DD
(V)
V
REF
NORMALIZED
MAX1138/MAX1136,
NORMALIZED TO
REFERENCE VALUE AT
V
DD
= 5V
MAX1139/MAX1137,
NORMALIZED TO
REFERENCE VALUE AT
V
DD
= 3.3V