5

FN2894.8

November 15, 2006

Typical Application

Inverting Unity Gain Circuit

Figure 6 shows a Compensation Circuit for an inverting unity

gain amplifier. The circuit was tested for functionality with

supply voltages from ±4V to ±15V, and the performance as

tested was: Slew Rate

≈ 120V/μs; Bandwidth ≈ 10MHz; and

Settling Time (0.1%)

≈ 500ns. Figure 7 illustrates the amplifier’s

frequency response, and it is important to note that capacitance

at pin 8 must be minimized for maximum bandwidth.

10K

OUT

HA-2520

5k

500pF

2K

10k

IN

+

-

FIGURE 6. INVERTING UNITY GAIN CIRCUIT

GAIN

PHASE

15

10

5

0

-5

-10

-15

10k

100k

1M

10M

0

-45

-90

-135

-180

FIGURE 7. FREQUENCY RESPONSE FOR INVERTING UNITY

GAIN CIRCUIT

FIGURE 8. OFFSET VOLTAGE vs TEMPERATURE (6 TYPICAL

UNITS FROM 3 LOTS)

FIGURE 9. BIAS CURRENT vs TEMPERATURE (6 TYPICAL

UNITS FROM 3 LOTS)

FIGURE 10. OFFSET CURRENT vs TEMPERATURE (5 TYPICAL

UNITS FROM 3 LOTS)

FIGURE 11. OPEN LOOP GAIN vs TEMPERATURE (6 TYPICAL

UNITS FROM 3 LOTS)

TEMPERATURE (

°C)

0

204060

80

100

120

-20

-40

0

1

2

3

4

5

6

-3

-2

-1

-60

TEMPERATURE (

°C)

0

20

40

60

80

100

120

-20

-40

-60

-160

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

TEMPERATURE (

°C)

0

20

40

60

80

100

120

-20

-40

-60

40

30

20

10

0

-30

-20

-10

TEMPERATURE (

°C)

0

2040

6080

100

120

-20

-40

-60

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

6

7

HA-2520, HA-2522, HA-2525