MCP619-I/P Microchip Technology, MCP619-I/P Datasheet - Page 13

• Manufacturer Part Number: MCP619-I/P
• Description: IC OPAMP 2.3V QUAD R-R 14DIP
• Manufacturer: Microchip Technology

Specifications of MCP619-I/P

• Slew Rate: 0.08 V/µs
• Operating Temperature: -40°C ~ 85°C
• Amplifier Type: General Purpose
• Number Of Circuits: 4
• Output Type: Rail-to-Rail
• Gain Bandwidth Product: 190kHz
• Current - Input Bias: 15nA
• Voltage - Input Offset: 150µV
• Current - Supply: 19µA
• Current - Output / Channel: 17mA
• Voltage - Supply, Single/dual (±): 2.3 V ~ 5.5 V
• Mounting Type: Through Hole
• Package / Case: 14-DIP (0.300", 7.62mm)
• Op Amp Type: General Purpose
• No. Of Amplifiers: 4
• Bandwidth: 190kHz
• Supply Voltage Range: 2.3V To 5.5V
• Amplifier Case Style: DIP
• No. Of Pins: 14
• Number Of Channels: 4
• Voltage Gain Db: 120 dB
• Common Mode Rejection Ratio (min): 80 dB
• Input Offset Voltage: 0.15 mV
• Operating Supply Voltage: 3 V, 5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Details

Now calculate the nominal DC bias point with offset:
EQUATION 4-1:
Use the worst-case specs and source values to
determine the worst-case
offset
input voltage range and output voltage range are not
exceeded.
4.3
There are two specifications that describe the output
swing capability of the MCP616/7/8/9 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 k
Figure 2-33 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
maximum output swing that can be achieved while the
amplifier still operates in its linear region. To verify
linear operation in this range, the large-signal DC
Open-Loop Gain (A
supply rails. The measurement must meet the specified
A
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
© 2005 Microchip Technology Inc.
Where:
OL
conditions in the specification table.
G
V
V
I
I
V
G
V
V
V
B
OS
for your design. Make sure the common mode
OOS
OS
CM
OOS
CM
OUT
N
N
Rail-to-Rail Output
Capacitive Loads
=
Range.
= V
= G
= V
1
= op amp’s noise gain (from the
= circuit’s output offset voltage
= op amp’s input offset voltage
= op amp’s input bias current
= op amp’s input offset current
= op amp’s common mode input
+
EQ
EQ
N
non-inverting input to the output)
voltage
R
[V
– (I
2
(G
OS
OL
This
R
B
N
1
+ I
) is measured at points inside the
+ I
) – V
– I
B
OS
OS
output voltage range and
((R
1
specification
((R
/2) R
(G
1
N
1
||R
||R
EQ
– 1) + V
2
load tied to V
2
) – R
) + R
EQ
OOS
EQ
defines
)
) / 2]
DD
the
/2.
response. A unity-gain buffer (G = +1) is the most
sensitive to capacitive loads, though all gains show the
same general behavior.
When driving large capacitive loads with these op
amps (e.g., > 60 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.
FIGURE 4-4:
stabilizes large capacitive loads.
Figure 4-5 gives recommended R
different capacitive loads and gains. The x-axis is the
normalized load capacitance (C
circuit’s noise gain. For non-inverting gains, G
Signal Gain are equal. For inverting gains, G
1+|Signal Gain| (e.g., -1 V/V gives G
FIGURE 4-5:
for Capacitive Loads.
After selecting R
resulting frequency response peaking and step
response overshoot. Modify R
response is reasonable. Bench evaluation and
simulations with the MCP616/7/8/9 SPICE macro
model are helpful.
10,000
1,000
V
100
10k
100
IN
1k
1.E-11
10p
Normalized Load Capacitance; C
MCP61X
ISO
MCP616/7/8/9
1.E-10
for your circuit, double-check the
100p
Output Resistor, R
Recommended R
ISO
in Figure 4-4) improves the
G
G
N
N
R
= +1
C
ISO
L
+2
L
ISO
/G
1.E-09
N
1n
’s value until the
), where G
N
DS21613B-page 13
ISO
= +2 V/V).
L
/G
ISO
N
V
ISO
values for
(F)
OUT
N
1.E-08
Values
N
and the
10n
is the
N
is