+2.7V, Low-Power, 4-Channel,
Serial 12-Bit ADCs in QSOP-16
____________________________Typical Operating Characteristics (continued)
(V
DD
= 3V, VREF = 2.5V, f
SCLK
= 2MHz, C
LOAD
= 20pF, T
A
= +25°C, unless otherwise noted.)
MAX1246/MAX1247
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1247-04
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1247-05
INTERNAL REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
MAX1247-06
2.00
1.75
SUPPLY CURRENT (mA)
1.50
1.25
1.00
0.75
SHUTDOWN SUPPLY CURRENT (µA)
R
L
=
∞
CODE = 101010100000
4.0
3.5
3.0
FULL POWER-DOWN
2.5020
2.5015
2.5010
VREF (V)
2.5005
2.5000
2.4995
2.4990
2.25
C
LOAD
= 50pF
MAX1246
2.5
2.0
1.5
1.0
0.5
C
LOAD
= 20pF
MAX1247
0.50
2.25
2.75
3.25
3.75
4.25
4.75
5.25
0
2.25
2.75
3.25
3.75
V
DD
(V)
4.25
4.75
5.25
2.75
3.25
3.75
V
DD
(V)
4.25
4.75
5.25
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
MAX1247-07
SHUTDOWN CURRENT
vs. TEMPERATURE
MAX1247-08
MAX1246
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1247-09
1.3
MAX1246
2.0
2.501
2.500
2.499
VREF (V)
V
DD
= 3.6V
V
DD
= 2.7V
2.498
2.497
2.496
SHUTDOWN CURRENT (µA)
1.2
SUPPLY CURRENT (mA)
1.6
1.1
1.2
1.0
MAX1247
0.9
R
LOAD
=
∞
CODE = 101010100000
-60
-20
20
60
100
140
0.8
0.4
2.495
2.494
-60
-20
20
60
100
140
-60
-20
20
60
100
140
TEMPERATURE (°C)
TEMPERATURE (°C)
0.8
0
TEMPERATURE (°C)
FFT PLOT
MAX1247-10
EFFECTIVE NUMBER OF BITS
vs. FREQUENCY
V
DD
= 2.7V
f
IN
= 10k
f
SAMPLE
= 133k
V
DD
= 2.7V
EFFECTIVE NUMBER OF BITS
11.8
MAX1247-11
20
0
-20
AMPLITUDE (dB)
-40
-60
-80
-100
-120
0
10
20
30
40
50
FREQUENCY (kHz)
60
12.0
11.6
11.4
11.2
11.0
70
1
10
FREQUENCY (kHz)
100
_______________________________________________________________________________________
7
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
