REV. A

OP200

–8–

0

5

30

25

20

10

15

0

CAPACITIVE LOAD – nF

0.5

1.0

1.5

RISING

FALLING

1.0

1.5

3.0

35

40

45

50

TPC 19. Overshoot vs.

Capacitive Load

TPC 22. Large-Signal

Transient Response

1/2

OP200AZ

40000

20k

5k

5k

1/2

OP200AZ

7

5

6

3

2

20k

–15V

+15V

1

8

4

Figure 4. Dual Low-Power Instrumentation Amplifier

The output signal is specified with respect to the reference

input, which is normally connected to analog ground. The

reference input can be used to offset the output from –10 V

to +10 V if required.

Gain

Bandwidth

5

150 kHz

10

67 kHz

100

7.5 kHz

1000

500 Hz

APPLICATIONS INFORMATION

The OP200 is inherently stable at all gains and is capable of

driving large capacitive loads without oscillating. Nonetheless,

good supply decoupling is highly recommended. Proper supply

decoupling reduces problems caused by supply line noise and

improves the capacitive load driving capability of the OP200.

APPLICATIONS

DUAL LOW-POWER INSTRUMENTATION AMPLIFIER

A dual instrumentation amplifier that consumes less than 33 mW

of power per channel is shown in Figure 4. The linearity of the

instrumentation amplifier exceeds 16 bits in gains of 5 to 200

and is better than 14 bits in gains from 200 to 1000. CMRR is

above 115 dB (Gain = 1000). Offset voltage drift is typically

0.2

mV/∞C over the military temperature range which is compa-

rable to the best monolithic instrumentation amplifiers. The

bandwidth of the low-power instrumentation amplifier is a func-

tion of gain and is shown below:

TIME – Minutes

2

SOURCING

SINKING

22

23

24

25

26

27

28

29

01

34

5

TPC 20. Short-Circuit

Current vs. Time

TPC 23. Small-Signal

Transient Response

FREQUENCY – Hz

100

10

100

1k

10k

100k

90

110

120

130

140

150

TPC 21. Channel Separation

vs. Frequency

TPC 24. Small-Signal Transient