LT1463 Ver la hoja de datos (PDF) - Linear Technology

Número de pieza

componentes Descripción

Fabricante

LT1463

Dual/Quad Micropower, 260µW C-Load Picoampere Bias Current JFET Input Op Amps

Linear Technology 

LT1462/LT1463

APPLICATIONS INFORMATION

Phase Reversal Protection

Most industry standard JFET input single, dual and quad

op amps exhibit phase reversal at the output when the

negative common mode limit at the input is exceeded.

Common mode range is at a premium at ±5V supplies. The

Figures show a ±5.2V sine wave input (Figure 1a), the

response of a competing JFET input op amp in the unity-

gain follower mode (Figure 1b) and the response of the

LT1462/LT1463 (Figure 1c).

The phase reversal of Figure 1b can cause lock-up in servo

systems. The LT1462/LT1463 does not phase-reverse when

the common mode input is anywhere within the supplies.

LT1462 • F01a

(1a) ±5.2V Sine Wave

LT1462 • F01b

(1b) Typical JFET Input Op Amp

with ±5V Supplies

LT1462 • F01c

(1c) LT1462/LT1463 Output

with ±5V Supplies

Figure 1. Voltage Follower with Input Exceeding the Common Mode Range (VS = ±5V)

7

Share Link: