
MAX1277/MAX1279
1.5Msps, Single-Supply, Low-Power, True-
Differential, 12-Bit ADCs with Internal Reference
8
_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(VDD = +3V, VL = VDD, fSCLK = 24MHz, fSAMPLE = 1.5Msps, TA = -40°C to +85°C, unless otherwise noted. Typical values are mea-
sured at TA = +25°C.)
8
6
4
2
0
750
250
500
1000
1250
1500
VDD SUPPLY CURRENT
vs. CONVERSION RATE
MAX1277/79
toc22
fSAMPLE (kHz)
V
DD
SUPPLY
CURRENT
(mA)
0
0.10
0.30
0.20
0.40
0.50
-40
10
-15
35
60
85
VL SUPPLY CURRENT
vs. TEMPERATURE
MAX1277/79
toc23
TEMPERATURE (
°C)
V
LSUPPLY
CURRENT
(mA)
CONVERSION, VL = 3V
CONVERSION, VL = 1.8V
0
50
150
100
200
250
0
500
250
750
1000
1250
1500
VL SUPPLY CURRENT
vs. CONVERSION RATE
MAX1277/79
toc24
fSAMPLE (kHz)
V
L
SUPPLY
CURRENT
(μ
A)
VL = 3V
VL = 1.8V
2.00
2.02
2.01
2.04
2.03
2.05
2.06
-40
10
-15
35
60
85
REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1277/79
toc25
TEMPERATURE (
°C)
REFERENCE
VOLTAGE
(V)
2.05
2.04
2.03
2.02
2.01
04
26
8
REFERENCE VOLTAGE
vs. LOAD CURRENT (SOURCE)
MAX1277/79
toc26
LOAD CURRENT (mA)
REFERENCE
VOLTAGE
(V)
2.08
2.07
2.06
2.05
2.04
0
100
50
150
200
REFERENCE VOLTAGE
vs. LOAD CURRENT (SINK)
MAX1277/79
toc27
LOAD CURRENT (
μA)
REFERENCE
VOLTAGE
(V)