CA3440 Ver la hoja de datos (PDF) - Intersil

Número de pieza

componentes Descripción

Fabricante

CA3440

63kHz, Nanopower, BiMOS Operational Amplifiers

Intersil 

CA3440

Schematic Diagram

QP1

ISET 8

QP2

QP3

QP4

QN9

D1

INVERTING

INPUT

2

NON-INVERTING 3

D2 D3

QP7 QP8

Q3

Q4

5

1

QP11

D4

30pF

Q5

Q6

QP5

QP6

QN10

D5

Q2

R1

200Ω

QP12

D6

7 V+

Q1

R2

30Ω

6 OUTPUT

Q7

R3

30Ω

4 V-

Application Information

-

FET

INPUT

+

FET/

BIPOLAR

OUTPUT

BIAS

ISET RSET

STAGE 1

HIGH GAIN

100dB

STAGE 2

BUFFER

LOW Z

OUTPUT

FIGURE 1. NANOPOWER OP AMP (SUPPLY CURRENT PRO-

GRAMMABLE USING RSET), 1pA TYPICAL INPUT

BIAS CURRENT, 4.0V TO 15V SUPPLY

+5V

7

2-

CA3440

6

3+

8

4

5

1

ISET

RSET

FIGURE 2. NANOPOWER OP AMP (USABLE STANDBY

POWER vs PROGRAMMING RESISTOR RSET)

As RSET is increased, ISET and the standby power decrease

while the BW/SR also decrease.

Operating at a +5V single supply, the CA3440 exhibits the

following characteristics:

RSET

1MΩ

10MΩ

100MΩ

1GΩ

STANDBY

POWER

250µW

25µW

2.5µW

250nW

BW

164kHz

27kHz

2.6kHz

78kHz

SR

0.17V/µs

0.017V/µs

0.0017V/µs

0.00017V/µs

The CA3440 is pin compatible with the 741 except that pins

1 and 5 (typical negative nulling pins) must be connected

either directly to pin 4 or to a negative nulling potentiometer.

In addition, pin 8, the ISET terminal, must be returned to

either ground or -V via RSET.

3-148

Share Link: