Datasheet

MAX191
Low-Power, 12-Bit Sampling ADC
with Internal Reference and Power-Down
6 _______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
10
0.01
0.1 10
CLOCK FREQUENCY
vs. TIMING CAPACITOR
0.1
1
TIMING CAPACITOR (nF)
CLOCK FREQUENCY (MHz)
1
SEE FIGURE 5
T
A
= +25˚C
GR191-A
0
-60 150
5
25
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
120
15
10
0 60
20
-30 30 90
V
DD
= +5V
V
SS
= -5V
PD = 0V
I
SS
I
DD
POWER-DOWN SUPPLY CURRENT
vs. TEMPERATURE
GR191-B
0
-60 150
5
25
TEMPERATURE (°C)
I
SS
(µA)
120
15
10
0 60
20
-30 30 90
NEGATIVE SUPPLY CURRENT
vs. TEMPERATURE
GR191-C
3.5
0.5
-60 -30 30 60
1.0
2.0
TEMPERATURE (°C)
I
DD
(mA)
0
1.5
90 120
150
2.5
3.0
0
POSITIVE SUPPLY CURRENT
vs. TEMPERATURE
GR191-D
0
-140
0 2 6
1kHz FFT PLOT
-100
-40
GR191-E
FREQUENCY (kHz)
SIGNAL AMPLITUDE (dB)
4
-80
1 3 5
-120
-60
-20
f
IN
= 1kHz
f
S
= 100kHz
SNR = 72dB
T
A
= +25˚C
-94.3dB-96.1dB-98.0dB-93.8dB
0
-140
0 10 30 40
10kHz FFT PLOT
-100
-60
GR191-F
FREQUENCY (kHz)
SIGNAL AMPLITUDE (dB)
15
-80
-120
-40
-20
f
IN
= 10kHz
f
S
= 100kHz
SNR = 71.2dB
T
A
= +25˚C
5 20 25 35
-86.0dB -90.8dB