Datasheet

© 2008 Microchip Technology Inc. DS21811E-page 11
MCP6281/1R/2/3/4/5
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 V
OUTA
/V
INB
+ 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 V
OUTA
/V
INB
+ pin. This connection
makes it possible to provide a Chip Select pin for duals
in 8-pin packages.
3.4 Chip Select Digital Input (CS)
This is a CMOS, Schmitt-triggered input that places the
part into a low-power mode of operation.
3.5 Power Supply Pins
The positive power supply (V
DD
) is 2.2V to 6.0V higher
than the negative power supply (V
SS
). For normal
operation, the other pins are between V
SS
and V
DD
.
Typically, these parts are used in a single (positive)
supply configuration. In this case, V
SS
is connected to
ground and V
DD
is connected to the supply. V
DD
will
need bypass capacitors.
MCP6281 MCP6281R MCP6283
Symbol Description
PDIP, SOIC,
MSOP
SOT-23-5 SOT-23-5
PDIP, SOIC,
MSOP
SOT-23-6
611 6 1V
OUT
Analog Output
244 2 4V
IN
– Inverting Input
333 3 3V
IN
+ Non-inverting Input
752 7 6V
DD
Positive Power Supply
425 4 2V
SS
Negative Power Supply
——— 8 5CS
Chip Select
1,5,8 — — 1,5 — NC No Internal Connection
MCP6282 MCP6284 MCP6285
Symbol Description
PDIP, SOIC, MSOP
PDIP, SOIC, TSSOP
PDIP, SOIC, MSOP
11—V
OUTA
Analog Output (op amp A)
222V
INA
– Inverting Input (op amp A)
333V
INA
+ Non-inverting Input (op amp A)
848V
DD
Positive Power Supply
55—V
INB
+ Non-inverting Input (op amp B)
666V
INB
– Inverting Input (op amp B)
777V
OUTB
Analog Output (op amp B)
—8—V
OUTC
Analog Output (op amp C)
—9—V
INC
– Inverting Input (op amp C)
—10—V
INC
+ Non-inverting Input (op amp C)
4114V
SS
Negative Power Supply
—12—V
IND
+ Non-inverting Input (op amp D)
—13—V
IND
– Inverting Input (op amp D)
—14—V
OUTD
Analog Output (op amp D)
—— 1V
OUTA
/
V
INB
+
Analog Output (op amp A)/Non-
inverting Input (op amp B)
—— 5CS
Chip Select