Datasheet

MAX951–MAX954
Ultra-Low-Power, Single-Supply
Op Amp + Comparator + Reference
__________________________________________________________________________________________________ 5
0
2.0 3.0 5.0 7.0
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
2
8
MAX951-954-toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
4.0 6.02.5 3.5 5.54.5 6.5
6
4
1
3
9
7
5
V
CM OPAMP
= 0
AMPOUT = (V
DD
+ V
SS
)/2
COMP- = 1.2V or REF
COMP+ = 1.1V
MAX953/MAX954
MAX951/MAX952
10
0
-60 -20 60 140
SUPPLY CURRENT
vs. TEMPERATURE
2
8
MAX951-954-toc02
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
20 100-40 0 8040 120
6
4
1
3
9
7
5
V
DD
= 2.8V (MAX951/952), V
DD
= 2.4V
(MAX953/954), V
SS
= 0, V
CM OPAMP
= 0
AMPOUT = 1/2 V
DD
, COMP- = 1.2V or REF
COMP+ = 1.1V
MAX951/MAX952
MAX953/MAX954
1.220
1.180
1.185
-60 -20-40 6040 140120
REFERENCE VOLTAGE vs. TEMPERATURE
1.190
1.215
MAX951-954-toc03
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
200 10080
1.205
1.210
1.195
1.200
V
DD
= 5V
1.30
1.10
1.12
1 10 100
REFERENCE OUTPUT VOLTAGE
vs. LOAD CURRENT
1.14
1.16
MAX951-954-toc04
LOAD CURRENT (µA)
REFERENCE VOLTAGE (V)
1.18
1.20
1.22
1.24
1.26
1.28
V
SUPPLY
= 5V
SINKING CURRENT
SOURCING CURRENT
1x10
6
1x10
0
-60 -40 -20 0 20 40 60 80 100 120 140
DC OPEN-LOOP GAIN
vs. TEMPERATURE
1x10
1
MAX951-954-toc07
TEMPERATURE (°C)
DC OPEN-LOOP GAIN (V/V)
1x10
2
1x10
3
1x10
5
1x10
4
V
DD
= 5V
1MHz INPUT SIGNAL
R
L
= 100kΩ
0
10
20
30
40
50
60
70
80
1 10 100 1k 10k 100k 1M
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX951-954-toc05
FREQUENCY (Hz)
PSRR (dB)
V
DD
= 2.0 to 3.0V, V
SS
= -2.5V
NONINVERTING
AMPIN+ = 0
A
CL
= 1V/V (MAX951/2)
A
CL
= 10V/V (MAX953/4),
COMP- = 1.2V or REF
COMP+ = 1.1V from V
SS
A
B
C
A: MAX951/952 REF
B: MAX951/953 OP AMP
C: MAX952/954 OP AMP
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
DC OPEN-LOOP GAIN vs.
SUPPLY VOLTAGE
MAX951-954-toc06
SUPPLY VOLTAGE (V)
DC OPEN-LOOP GAIN (V/V)
1mHz INPUT SIGNAL
R
L
= 100kΩ
1x10
7
1x10
0
1x10
1
1x10
2
1x10
3
1x10
6
1x10
5
1x10
4
100
-20
1 10 100 1k 10k 100k 1M
MAX951/MAX953
OPEN-LOOP GAIN AND PHASE
vs. FREQUENCY
0
MAX951-954-toc08
FREQUENCY (Hz)
OPEN-LOOP GAIN (dB)
20
40
60
80
0
-360
-300
-240
-180
-120
-60
GAIN
R
L
= 100kΩ
PHASE
PHASE SHIFT (Degrees)
100
1 10 100 1k 10k 100k 1M
MAX952/MAX954
OPEN-LOOP GAIN AND PHASE
vs. FREQUENCY
-20
MAX951-954-toc09
FREQUENCY (Hz)
OPEN-LOOP GAIN (dB)
PHASE SHIFT (Degrees)
0
20
40
80
60
R
L
= 100kΩ
GAIN
PHASE
0
-360
-300
-240
-180
-120
-60
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)