Ultra-Low-Power, Single-Supply

Op Amp + Comparator + Reference

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5

0

2

3

5

7

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

2

8

SUPPLY VOLTAGE (V)

4

6

2.5

3.5

5.5

4.5

6.5

6

4

1

3

9

7

5

COMP- = 1.2V or REF

COMP+ = 1.1V

MAX953/MAX954

MAX951/MAX952

10

0

-60

-20

60

140

SUPPLY CURRENT

vs. TEMPERATURE

2

8

TEMPERATURE (°C)

20

100

-40

0

80

40

120

6

4

1

3

9

7

5

COMP+ = 1.1V

MAX951/MAX952

MAX953/MAX954

1.220

1.180

1.185

-60

-20

-40

60

40

140

120

REFERENCE VOLTAGE vs. TEMPERATURE

1.190

1.215

TEMPERATURE (°C)

20

0

100

80

1.205

1.210

1.195

1.200

1.30

1.10

1.12

1

10

100

REFERENCE OUTPUT VOLTAGE

vs. LOAD CURRENT

1.14

1.16

LOAD CURRENT (

µA)

1.18

1.20

1.22

1.24

1.26

1.28

SINKING CURRENT

SOURCING CURRENT

-60 -40 -20

0

20 40 60 80 100 120 140

DC OPEN-LOOP GAIN vs. TEMPERATURE

TEMPERATURE (°C)

1mHz INPUT SIGNAL

0

10

20

30

40

50

60

70

80

POWER-SUPPLY REJECTION

RATIO vs. FREQUENCY

FREQUENCY (Hz)

NONINVERTING

AMPIN+ = 0V

COMP- = 1.2V or REF

A

B

C

A: MAX951/952 REF

B: MAX951/953 OP AMP

C: MAX952/954 OP AMP

2

2.5 3

3.5

4 4.5 5

5.5 6 6.5 7

DC OPEN-LOOP GAIN vs.

SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

1mHz INPUT SIGNAL

100

-20

1

10

100

1k

10k

100k

1M

MAX951/MAX953 OPEN-LOOP GAIN

AND PHASE vs. FREQUENCY

0

FREQUENCY (Hz)

20

40

60

80

0

-360

-300

-240

-180

-120

-60

GAIN

PHASE

100

-40

1

10

100

1k

10k

100k

1M

MAX952/MAX954 OPEN-LOOP GAIN

AND PHASE vs. FREQUENCY

-20

FREQUENCY (Hz)

0

20

40

80

60

GAIN

PHASE

0

-360

-300

-240

-180

-120

-60

__________________________________________Typical Operating Characteristics