Datasheet

MAX9945
38V, Low-Noise, MOS-Input,
Low-Power Op Amp
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
CC
= +15V, V
EE
= -15V, V
IN+
= V
IN-
= V
GND
= 0V, R
OUT
= 100kΩ to GND, T
A
= -40°C to +125°C, typical values are at T
A
= +25°C,
unless otherwise noted.)
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE AND TEMPERATURE
MAX9945 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
353025201510
300
400
500
600
200
5
T
A
= +125°C
T
A
= +25°C
T
A
= -40°C
OUTPUT VOLTAGE SWING LOW
vs. TEMPERATURE
MAX9945 toc02
TEMPERATURE (°C)
V
OL
- V
EE
(V)
100 120806040200-20
0.10
0.05
0.15
0.20
0.25
0
-40
I
SINK
= 1.0mA
I
SINK
= 0.1mA
OUTPUT VOLTAGE SWING HIGH
vs. TEMPERATURE
MAX9945 toc03
TEMPERATURE (°C)
V
CC
- V
OH
(V)
100 120806040200-20
0.10
0.05
0.15
0.20
0.25
0
-40
I
SOURCE
= 1.0mA
I
SOURCE
= 0.1mA
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX9945 toc04
TEMPERATURE (°C)
I
BIAS
(pA)
100806002040-20
0
10
20
30
40
50
60
70
80
-10
-40 120
INPUT VOLTAGE
0.1Hz TO 10Hz NOISE
MAX9945 toc05
1s/div
1
µ
V/div
INPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY
MAX9945 toc06
FREQUENCY (Hz)
INPUT VOLTAGE-NOISE DENSITY (nV/ Hz)
10,000 100,000100010010
100
1000
10
1
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX9945 toc07
FREQUENCY (Hz)
THD (dB)
100,00010,0001000
-90
-70
-80
-110
-100
100
V
CC
- V
EE
= 30V,
4.5V
P-P
, R
L
= 10kΩ
TOTAL HARMONIC DISTORTION + NOISE
vs. FREQUENCY
MAX9945 toc08
FREQUENCY (Hz)
THD+N (dB)
-90
-80
-70
-60
-50
-100
100,00010,000100 100010
V
CC
- V
EE
= 30V
4.5V
P-P
R
L
= 10kΩ