Datasheet

MAX1291/MAX1293
250ksps, +3V, 8-/4-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
_______________________________________________________________________________________ 7
2.48
2.49
2.51
2.50
2.52
2.53
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1291/3 toc11
TEMPERATURE (°C)
V
REF
(V)
-40 10-15 35 60 85
-2.5
-2.0
-1.0
-1.5
-0.5
0.0
OFFSET ERROR vs. SUPPLY VOLTAGE
MAX1291/3 toc12
V
DD
(V)
OFFSET ERROR (LSB)
2.7 3.33.0 3.6
-2.5
-1.5
-2.0
-0.5
-1.0
0.0
0.5
-40 10-15 35 60 85
OFFSET ERROR vs. TEMPERATURE
MAX1291/3 toc13
TEMPERATURE (°C)
OFFSET ERROR (LSB)
-3
-1
-2
0
1
2.7 3.33.0 3.6
GAIN ERROR vs. SUPPLY VOLTAGE
MAX1291/3 toc14
V
DD
(V)
GAIN ERROR (LSB)
-2.0
-1.5
-0.5
-1.0
0.0
0.5
GAIN ERROR vs. TEMPERATURE
MAX1291/3 toc15
TEMPERATURE (°C)
GAIN ERROR (LSB)
-40 10-15 35 60 85
50
150
100
200
250
2.7 3.33.0 3.6
LOGIC SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1291/3 toc16
V
DD
(V)
I
LOGIC
(µA)
50
100
150
200
250
LOGIC SUPPLY CURRENT
vs. TEMPERATURE
MAX1291/3 toc17
TEMPERATURE (°C)
I
LOGIC
(µA)
-40 10 35-15 60 85
Typical Operating Characteristics (continued)
(V
DD
= V
LOGIC
= +3V, V
REF
= +2.500V, f
CLK
= 4.8MHz, C
L
= 20pF, T
A
= +25°C, unless otherwise noted.)
2.48
2.49
2.51
2.50
2.52
2.53
INTERNAL REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
MAX1291/3 toc10
V
DD
(V)
V
REF
(V)
2.7 3.33.0 3.6
-140
-120
-100
-80
-60
-40
-20
0
20
0 400200 600 800 1000 1200
FFT PLOT
MAX1291/93 toc18
FREQUENCY (kHz)
AMPLITUDE (dB)
V
DD
= 3V
f
IN
= 50kHz
f
SAMPLE
= 250ksps