SOTA

OTA

R

Q

R

Q

GND

9

3

4

Switching Stage

Sampling Comparator

(SC)

7

10

11

S/H In+

S/H In

−

Hold

Control

C

HOLD

Base

R

B

(25

Ωto 200Ω)

2

12

Biasing

5

13

−V

CC

+V

CC

−5V

+5V

1

2.2

µF

10nF

470pF

10nF

2.2

µF

470pF

Solid Tantalum

+

+

R

Q

I

Q Adjust

Collector

Emitter

R

Q = 300Ω sets approximately

I

Q = 13mA

(20

Ω

to

200

Ω)

∞

OPA615

SBOS299E – FEBRUARY 2004 – REVISED SEPTEMBER 2009...................................................................................................................................... www.ti.com

APPLICATION INFORMATION

The OPA615 operates from ±5V power supplies

Power-supply bypass capacitors should be located as

(±6.2V maximum). Absolute maximum is ±6.5V. Do

close as possible to the device pins. Solid tantalum

not attempt to operate with larger power supply

capacitors are generally best. See Board Layout at

voltages or permanent damage may occur.

the end of the applications discussion for further

suggestions on layout.

BASIC CONNECTIONS

Figure 39 shows the basic connections required for

operation. These connections are not shown in

subsequent circuit diagrams.

Figure 39. Basic Connections

16

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