TL087, TL088, TL287, TL288

JFET INPUT OPERATIONAL AMPLIFIERS

SLOS082B – MARCH 1979 – REVISED – JULY 2004

18

POST OFFICE BOX 655303

TYPICAL APPLICATION DATA

output characteristics

All operating characteristics are specified with 100-pF load capacitance. These amplifiers will drive higher

capacitive loads; however, as the load capacitance increases, the resulting response pole occurs at lower

frequencies, causing ringing, peaking, or even oscillation. The value of the load capacitance at which oscillation

occurs varies with production lots. If an application appears to be sensitive to oscillation due to load capacitance,

adding a small resistance in series with the load should alleviate the problem. Capacitive loads of 1000 pF, and

larger, may be driven if enough resistance is added in series with the output (see Figure 43).

(a) CL = 100 pF, R = 0

(b) CL = 300 pF, R = 0

(c) CL = 350 pF, R = 0

(d) CL = 1000 pF, R = 0

(e) CL = 1000 pF, R = 50 Ω

(f) CL = 1000 pF, R = 2 kΩ

Figure 43. Effect of Capacitive Loads

5 V

−5 V

15 V

− 15 V

2 k

Ω

VO

R

NOTE A: CL includes fixture capacitance

CL

(see Note A)

Figure 44. Test Circuit for Output Characteristics