
MAX11646/MAX11647
Low-Power, 1-/2-Channel, I2C, 10-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
6
_______________________________________________________________________________________
Typical Operating Characteristics
(VDD = 3.3V (MAX11647), VDD = 5V (MAX11646), fSCL = 1.7MHz, external clock, fSAMPLE = 94.4ksps, single-ended, unipolar,
TA = +25°C, unless otherwise noted.)
-0.3
-0.1
-0.2
0.1
0
0.2
0.3
0
1000
DIFFERENTIAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
MAX11646
toc01
DIGITAL OUTPUT CODE
DNL
(LSB)
400
200
600
800
-0.5
-0.2
-0.3
-0.4
-0.1
0
0.1
0.2
0.3
0.4
0.5
0
400
200
600
800
1000
INTEGRAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
MAX11646
toc02
DIGITAL OUTPUT CODE
INL
(LSB)
-160
-140
-120
-100
-80
-60
-40
-20
0
10k
20k
30k
40k
50k
FFT PLOT
MAX11646
toc03
FREQUENCY (Hz)
AMPLITUDE
(dBc)
fSAMPLE = 94.4ksps
fIN = 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
MAX11646
toc04
TEMPERATURE (
°C)
SUPPLY
CURRENT
(μ
A)
INTERNAL REFERENCE
MAX11646
MAX11647
INTERNAL 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
MAX11646
toc05
SUPPLY VOLTAGE (V)
I DD
(μ
A)
3.7
3.2
4.2
4.7
SDA = SCL = VDD
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
MAX11646
toc06
TEMPERATURE (
°C)
SUPPLY
CURRENT
(μ
A)
MAX11647
MAX11646
0
100
200
300
400
500
600
700
800
900
1000
0
20406080
100
AVERAGE SUPPLY CURRENT
vs. CONVERSION RATE (EXTERNAL CLOCK)
MAX11646
toc07
CONVERSION RATE (ksps)
AVERAGE
I
DD
(μ
A)
0
A) INTERNAL REFERENCE ALWAYS ON
B) EXTERNAL REFERENCE
B
A
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
MAX11646
toc08
TEMPERATURE (
°C)
V
REF
NORMALIZED
MAX11646
MAX11647
NORMALIZED TO REFERENCE VALUE
TA = +25
°C