MCP602-E/SN Microchip Technology, MCP602-E/SN Datasheet - Page 13

• Manufacturer Part Number: MCP602-E/SN
• Description: IC OPAMP DUAL 2.7V 8SOIC
• Manufacturer: Microchip Technology

Specifications of MCP602-E/SN

• Slew Rate: 2.3 V/µs
• Amplifier Type: General Purpose
• Number Of Circuits: 2
• Output Type: Rail-to-Rail
• Gain Bandwidth Product: 2.8MHz
• Current - Input Bias: 1pA
• Voltage - Input Offset: 700µV
• Current - Supply: 230µA
• Current - Output / Channel: 22mA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Op Amp Type: CMOS
• No. Of Amplifiers: 2
• Bandwidth: 2.8MHz
• Supply Voltage Range: 2.7V To 6V
• Amplifier Case Style: SOIC
• No. Of Pins: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

4.2
There are two specifications that describe the output
swing capability of the MCP601/1R/2/3/4 family of op
amps. The first specification (Maximum Output Voltage
Swing) defines the absolute maximum swing that can
be achieved under the specified load conditions. For
instance, the output voltage swings to within 15 mV of
the negative rail with a 25 kΩ load to V
shows how the output voltage is limited when the input
goes beyond the linear region of operation.
The second specification that describes the output
swing capability of these amplifiers is the Linear Output
Voltage Swing. This specification defines the maximum
output swing that can be achieved while the amplifier is
still operating in its linear region. To verify linear
operation in this range, the large signal (DC Open-Loop
Gain (A
supply rails. The measurement must exceed the
specified gains in the specification table.
4.3
The MCP603 is a single amplifier with Chip Select
(CS). When CS is pulled high, the supply current drops
to -0.7 µA (typ.), which is pulled through the CS pin to
V
a high-impedance state. Pulling CS low enables the
amplifier.
The CS pin has an internal 5 MΩ (typical) pull-down
resistor connected to V
is left floating.
diagram and shows the output voltage, supply currents,
and CS current in response to a CS pulse.
shows the measured output voltage response to a CS
pulse.
4.4
Driving large capacitive loads can cause stability
problems for voltage feedback op amps. As the load
capacitance increases, the feedback loop’s phase
margin decreases and the closed-loop bandwidth is
reduced. This produces gain peaking in the frequency
response with overshoot and ringing in the step
response.
When driving large capacitive loads with these op
amps (e.g., > 40 pF when G = +1), a small series
resistor at the output (R
feedback loop’s phase margin (stability) by making the
output load resistive at higher frequencies. The
bandwidth will be generally lower than the bandwidth
with no capacitive load.
© 2007 Microchip Technology Inc.
SS
. When this happens, the amplifier output is put into
OL
Rail-to-Rail Output
MCP603 Chip Select
Capacitive Loads
)) is measured at points 100 mV inside the
Figure 1-1
SS
ISO
, so it will go low if the CS pin
in
is the Chip Select timing
Figure
4-4) improves the
DD
/2.
Figure 2-27
Figure 2-33
FIGURE 4-4:
stabilizes large capacitive loads.
Figure 4-5
different capacitive loads and gains. The x-axis is the
normalized load capacitance (C
it easier to interpret the plot for arbitrary gains. G
circuit’s noise gain. For non-inverting gains, G
gain are equal. For inverting gains, G
(e.g., -1 V/V gives G
FIGURE 4-5:
for capacitive loads.
Once you have selected R
check the resulting frequency response peaking and
step response overshoot in your circuit. Evaluation on
the bench and simulations with the MCP601/1R/2/3/4
SPICE macro model are very helpful. Modify R
value until the response is reasonable.
4.5
With this family of op amps, the power supply pin (V
for single-supply) should have a local bypass capacitor
(i.e., 0.01 µF to 0.1 µF) within 2 mm for good high-
frequency performance. It also needs a bulk capacitor
(i.e., 1 µF or larger) within 100 mm to provide large,
slow currents. This bulk capacitor can be shared with
nearby analog parts.
100
1k
10
R
10p
G
Supply Bypass
MCP601/1R/2/3/4
gives recommended R
+
–
MCP60X
Normalized Load Capacitance;
N
100p
R
= +2 V/V).
Output resistor R
Recommended R
F
G
G
N
N
C
ISO
= +1
≥ +2
L
/ G
N
for your circuit, double-
L
(F)
/G
R
N
1n
ISO
DS21314G-page 13
) in order to make
C
ISO
N
L
= 1 + |Gain|
ISO
ISO
values for
N
values
and the
V
N
OUT
10n
is the
ISO
DD
’s