MCP6273-E/SL Microchip Technology, MCP6273-E/SL Datasheet - Page 10

• Manufacturer Part Number: MCP6273-E/SL
• Description: 170 uA, 2 MHz Rail-to-Rail Op Amp
• Manufacturer: Microchip Technology

MCP6271/2/3/4/5
3.0
The MCP6271/2/3/4/5 family of op amps is manufac-
tured using Microchip’s state-of-the-art CMOS process,
specifically designed for low-cost, low-power and
general-purpose applications. The low supply voltage,
low quiescent current and wide bandwidth makes the
MCP6271/2/3/4/5
applications.
3.1
The MCP6271/2/3/4/5 op amps are designed to
prevent phase reversal when the input pins exceed the
supply voltages. Figure 3-1 shows the input voltage
exceeding the supply voltage without any phase
reversal.
FIGURE 3-1:
No Phase Reversal.
The input stage of the MCP6271/2/3/4/5 op amp uses
two differential input stages in parallel. One operates at
low common mode input voltage (V
high V
V
The
V
proper operation.
Input voltages that exceed the input voltage range
(V
excessive current to flow into or out of the input pins.
Current beyond ±2 mA can cause reliability problems.
Applications that exceed this rating must be externally
limited with a resistor, as shown in Figure 3-2.
DS21810C-page 10
CM
CM
SS
up to 300 mV above V
= V
– 0.3V to V
-1
CM
6
5
4
3
2
1
0
Input
SS
-15
APPLICATION INFORMATION
Rail-to-Rail Input
. With this topology, the device operates with
– 300 mV and V
-14
Offset
-13
DD
-12
V
ideal
IN
+ 0.3V at 25°C) can cause
The MCP6271/2/3/4/5 Show
Time (1 ms/div)
Voltage
-11
DD
-10
DD
and 300 mV below V
for
V
+ 300 mV to ensure
OUT
-9
CM
is
) and the other at
-8
battery-powered
measured
-7
V
G = +2 V/V
DD
= 5.0V
-6
-5
SS
at
.
FIGURE 3-2:
Resistor (R
3.2
The output voltage range of the MCP6271/2/3/4/5 op
amp is V
when R
V
3.3
The MCP6273 and MCP6275 are single and dual op
amps with chip select (CS), respectively. When CS is
pulled high, the supply current drops to 0.7 µA (typ) and
flows through the CS pin to V
the amplifier output is put into a high-impedance state.
By pulling CS low, the amplifier is enabled. If the CS pin
is left floating, the amplifier may not operate properly.
Figure 3-3 shows the output voltage and supply current
response to a CS pulse.
FIGURE 3-3:
Select (CS) pin on the MCP6273 and MCP6275.
V
DD
I
OUT
VSS
CS
I
CS
V
= 5.5V. Refer to Figure 2-16 for more information.
IN
-0.7 µA, typ
R IN
0.7 µA, typ
R IN
Rail-to-Rail Output
MCP6273/5 Chip Select (CS)
L
DD
Hi-Z
= 10 k
IN
– 15 mV (min.) and V
--------------------------------------------------------------------------------------- -
V SS
------------------------------------------------------------------------------------- -
Maximum expected V IN
).
R
IN
V
–
t
IL
on
is connected to V
Minimum expected V IN
Input Current Limiting
Timing Diagram for the Chip
 2004 Microchip Technology Inc.
–
MCP6271
+
10 nA, typ
-170 µA, typ
2 mA
2 mA
SS
. When this happens,
SS
+ 15 mV (max.)
V
–
IH
0.7 µA, typ
-0.7 µA, typ
V DD
t
off
DD
V
/2 and
Hi-Z
OUT