OPA660AP datasheet(8/20 Pages) TI1

8 / 20 page

OPA660

(2)

(8)

(3)

(6)

(5)

Bias

Circuitry

CC = +5V

BUFFER

OTA

100

Ω

50k

Ω

R (ext.)

–V

CC = –5V

I Adj.

(1)

(7)

(4)

HARMONIC DISTORTION vs FREQUENCY

–30

–40

–50

–60

–70

10M

20M

40M

60M

100M

Frequency (Hz)

L = 500Ω

Q = 20mA

2Vp-p

0.5Vp-p

2Vp-p

0.5Vp-p

Measurement Limit

–80

HARMONIC DISTORTION vs FREQUENCY

–30

–40

–50

–60

–70

10M

20M

40M

60M

100M

Measurement Limit

Frequency (Hz)

L = 150Ω

O = 0.5Vp-p

Q = 20mA

–80

TYPICAL PERFORMANCE CURVES (CONT)

IQ = 20mA, TA = +25°C, and VS = ±5V unless otherwise noted.

APPLICATIONS INFORMATION

The OPA660 operates from

±5V power supplies (±6V

maximum). Do not attempt to operate with larger power

supply voltages or permanent damage may occur.

Inputs of the OPA660 are protected with internal diode

clamps as shown in the simplified schematic, Figure 1. These

protection diodes can safely conduct 10mA, continuously

(30mA peak). If input voltages can exceed the power supply

voltages by 0.7V, the input signal current must be limited.

The buffer output is not current-limited or protected. If the

output is shorted to ground, currents up to 60mA could flow.

Momentary shorts to ground (a few seconds) should be

avoided, but are unlikely to cause permanent damage. The

same cautions apply to the OTA section when connected as

a buffer (see Basic Applications Circuits, Figure 6b).

FIGURE 1. Simplified Circuit Diagram.

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