Typical operating characteristics – Rainbow Electronics MAX11645 User Manual
Page 6
MAX11644/MAX11645
Low-Power, 1-/2-Channel, I
2
C, 12-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
6
_______________________________________________________________________________________
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.)
-0.5
-0.2
-0.4
-0.3
0.2
0.1
-0.1
0
0.3
0.5
0
4000
DIFFERENTIAL NONLINEARITY
vs. DIGITAL CODE
MAX11644 toc01
DIGITAL OUTPUT CODE
DNL (LSB)
1000 1500
500
2000 2500 3000 3500
0.4
-1.0
-0.4
-0.6
-0.8
-0.2
0
0.2
0.4
0.6
0.8
1.0
INTEGRAL NONLINEARITY
vs. DIGITAL CODE
M
AX11644 toc02
DIGITAL OUTPUT CODE
INL (LSB)
0
4000
1000 1500
500
2000 2500 3000 3500
-140
-120
-100
-80
-60
-40
-20
0
10k
20k
30k
40k
50k
FFT PLOT
MAX11644 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
M
AX11644 toc04
TEMPERATURE (
°C)
SUPPLY CURRENT (
μ
A)
SETUP BYTE
EXT REF: 10111011
INT REF: 11011011
INTERNAL REFERENCE MAX11644
INTERNAL REFERENCE MAX11645
EXTERNAL REFERENCE MAX11644
EXTERNAL REFERENCE MAX11645
0
0.2
0.1
0.4
0.3
0.5
0.6
2.7
5.2
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
M
AX11644 toc05
SUPPLY VOLTAGE (V)
I
DD
(μ
A)
3.7
3.2
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
M
AX11644 toc06
TEMPERATURE (
°C)
SUPPLY CURRENT (
μ
A)
MAX11644
MAX11645
0
200
100
300
400
500
600
700
800
900
1000
0
20
40
60
80
100
ANALOG SUPPLY CURRENT vs.
CONVERSION RATE (EXTERNAL CLOCK)
M
AX11644 toc07
CONVERSION RATE (ksps)
AVERAGE I
DD
(μ
A)
0
EXTERNAL REFERENCE
INTERNAL REFERENCE ALWAYS ON