Ultra-Small, Low-Cost, 85MHz Op Amps with

Rail-to-Rail Outputs and Disable

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13

Chip Information

MAX4389 TRANSISTOR COUNT: 70

MAX4390 TRANSISTOR COUNT: 70

MAX4392 TRANSISTOR COUNT: 204

MAX4393 TRANSISTOR COUNT: 204

MAX4394 TRANSISTOR COUNT: 298

MAX4395 TRANSISTOR COUNT: 396

MAX4396 TRANSISTOR COUNT: 396

PROCESS: BiCMOS

MAX438 _

Figure 2. Driving a Capacitive Load Through an Isolation Resistor

-5

-3

-4

100k

10M

100M

1M

1G

-1

FREQUENCY (Hz)

1

4

6

-6

-2

0

3

2

5

100pF

68pF

33pF

Figure 4. Small-Signal Gain vs. Frequency with Load

Capacitance and No Isolation Resistor

-5

-3

-4

100k

10M

100M

1M

1G

-1

FREQUENCY (Hz)

1

4

6

-6

-2

0

3

2

5

68pF

180pF

120pF

Figure 5. Small-Signal Gain vs. Frequency with Load

Capacitance and 27

Ω Isolation Resistor

15

16

14

13

10

11

12

9

50

0

100

200

300

150

250

350 400 450 500 550

LARGE SIGNAL

SMALL SIGNAL

Figure 3. Isolation Resistance vs. Capacitive Load