12

®

OPA627, 637

When driven with a very fast input step (left), common-mode

transients cause a slight variation in input stage currents which

will reduce output slew rate. If the input step slew rate is reduced

(right), output slew rate will increase slightly.

FIGURE 9. OPA627 Dynamic Performance, G = –1.

NOTE: (1) Optimum value will

depend on circuit board lay-

out and stray capacitance at

the inverting input.

LARGE SIGNAL RESPONSE

+10

0

–10

+10

0

–10

(C)

(D)

OPA637

LARGE SIGNAL RESPONSE

OPA637

SMALL SIGNAL RESPONSE

FPO

FIGURE 10. OPA637 Dynamic Response, G = 5.

–10

0

+10

–100

0

+100

(F)

(E)

–

+

OPA627

G = –1

2k

Ω

2k

Ω

V

OUT

–

+

OPA637

G = 5

2k

Ω

500

Ω

V

OUT

NOTE: (1) Optimum value will depend on circuit

board layout and capacitance at inverting input.