MCP6281 datasheet(10/32 Pages) MICROCHIP

10 / 32 page

MCP6281/2/3/4/5

DS21811D-page 10

 2004 Microchip Technology Inc.

3.0

PIN DESCRIPTIONS

Descriptions of the pins are listed in Table 3-1 (single op amps) and Table 3-2 (dual and quad op amps).

TABLE 3-1:

PIN FUNCTION TABLE FOR SINGLE OP AMPS

TABLE 3-2:

PIN FUNCTION TABLE FOR DUAL AND QUAD OP AMPS

3.1

Analog Outputs

The output pins are low-impedance voltage sources.

3.2

Analog Inputs

The non-inverting and inverting inputs are high-

impedance CMOS inputs with low bias currents.

3.3

MCP6285’s VOUTA/VINB+ Pin

For the MCP6285 only, the output of op amp A is

connected directly to the non-inverting input of

op amp B; this is the VOUTA/VINB+ pin. This connection

makes it possible to provide a Chip Select pin for duals

in 8-pin packages.

3.4

CS Digital Input

This is a CMOS, Schmitt-triggered input that places the

part into a low-power mode of operation.

3.5

Power Supply (VSS and VDD)

The positive power supply (VDD) is 2.2V to 5.5V higher

than the negative power supply (VSS). For normal

operation, the other pins are between VSS and VDD.

Typically, these parts are used in a single (positive)

supply configuration. In this case, VSS is connected to

ground and VDD is connected to the supply. VDD will

need a local bypass capacitor (typically 0.01 µF to

0.1 µF) within 2 mm of the VDD pin. These parts need

to use a bulk capacitor (within 100 mm), which can be

shared with nearby analog parts.

MCP6281

(PDIP, SOIC,

MSOP)

MCP6281

(SOT-23-5)

MCP6271R

(SOT-23-5)

MCP6283

(PDIP, SOIC,

MSOP)

MCP6283

(SOT-23-6)

Symbol

Description

VOUT

Analog Output

VIN–

Inverting Input

VIN+

Non-inverting Input

VDD

Positive Power Supply

VSS

Negative Power Supply

——

—

Chip Select

1,5,8

—

1,5

—

No Internal Connection

MCP6282

MCP6284

MCP6285

Symbol

Description

—

VOUTA

Analog Output (op amp A)

222VINA–

Inverting Input (op amp A)

333

VINA+

Non-inverting Input (op amp A)

848

VDD

Positive Power Supply

—

VINB+

Non-inverting Input (op amp B)

666VINB–

Inverting Input (op amp B)

777

VOUTB

Analog Output (op amp B)

—8

—

VOUTC

Analog Output (op amp C)

—9

—

VINC–

Inverting Input (op amp C)

—10

—

VINC+

Non-inverting Input (op amp C)

4114

VSS

Negative Power Supply

—12

—

VIND+

Non-inverting Input (op amp D)

—13

—

VIND–

Inverting Input (op amp D)

—14

—

VOUTD

Analog Output (op amp D)

——

VOUTA/VINB+

Analog Output (op amp A)/Non-inverting Input (op amp B)

——

Chip Select

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