MCP651 datasheet(20/56 Pages) MICROCHIP

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MCP651/2/4/5/9

DS22146B-page 20

3.0

PIN DESCRIPTIONS

Descriptions of the pins are listed in Table 3-1.

TABLE 3-1:

PIN FUNCTION TABLE

3.1

Analog Outputs

The analog output pins (VOUT) are low-impedance

voltage sources.

3.2

Analog Inputs

The non-inverting and inverting inputs (VIN+, VIN–, …)

are high-impedance CMOS inputs with low bias

currents.

3.3

Power Supply Pins

The positive power supply (VDD) is 2.5V 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 bypass capacitors.

3.4

Calibration Common Mode

Voltage Input

A low impedance voltage placed at this input (VCAL)

analog input will set the op amps’ common mode input

voltage during calibration. If this pin is left open, the

common mode input voltage during calibration is

approximately VDD/3. The internal resistor divider is

disconnected from the supplies whenever the part is

not in calibration.

MCP651

MCP652

MCP654

MCP655

MCP659

Symbol

Description

SOIC

SOIC DFN SOIC TSSOP MSOP DFN

QFN

VOUT, VOUTA Output (op amp A)

VIN–, VINA–

Inverting Input (op amp A)

VIN+, VINA+

Non-inverting Input (op amp A)

VSS

Negative Power Supply

—

CAL/CS,

CALA/CSA

Calibrate/Chip Select Digital Input

(op amp A)

——

—

CALB/CSB

Calibrate/Chip Select Digital Input

(op amp B)

——

—

CALAD/CSAD Calibrate/Chip Select Digital Input

(op amps A and D)

——

—

CALBC/CSBC Calibrate/Chip Select Digital Input

(op amps B and C)

—5

VINB+

Non-inverting Input (op amp B)

—6

VINB–

Inverting Input (op amp B)

—7

VOUTB

Output (op amp B)

——

—

VINC+

Non-inverting input (op amp C)

——

—

VINC-

Inverting Input (op amp C)

——

—

VOUTC

Output (op amp C)

——

—

VIND+

Non-inverting Input (op amp D)

——

—

VIND-

Inverting Input (op amp D)

——

—

VOUTD

Output (op amp D)

VDD

Positive Power Supply

5—

—

VCAL

Calibration Common Mode Voltage

Input

—

No Internal Connection

—

Exposed Thermal Pad (EP);

must be connected to VSS

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