MCP6292-E/SL Microchip Technology, MCP6292-E/SL Datasheet - Page 14
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MCP6292-E/SL
Manufacturer Part Number
MCP6292-E/SL
Description
1.0 mA, 10 MHz Rail-to-Rail Op Amp
Manufacturer
Microchip Technology
Datasheet
1.MCP6292-ESL.pdf
(28 pages)
MCP6291/2/3/4/5
3.8.3.4
Figure 3-13 shows a buffered non-inverting integrator
with chip select. Op amp A is configured as a non-
inverting integrator. In this configuration, matching the
impedance at each input is recommended. R
to provide a feedback loop at frequencies << 1/(2 RC).
Op amp B is used to isolate the load from the integrator.
FIGURE 3-13:
Integrator with Chip Select Circuit.
3.8.3.5
Figure 3-14 uses an active compensator (op amp B) to
compensate for the non-ideal characteristics intro-
duced at higher frequency integration. The alternative
is to use a passive element, such as a resistor, for com-
pensation. However, the quality of compensation would
not be constant since the AC characteristics of an
amplifier varies over temperature and process. This cir-
cuit uses op amp B as a unity-gain buffer to isolate the
integration capacitor C
capacitor with low impedance source. Since both
amplifiers are matched very well, it provides a higher
quality of integration.
FIGURE 3-14:
Compensation.
DS21812C-page 14
V
IN
V
IN
R
1
R
R
1
1
Buffered Non-inverting Integrator
Integrator with Active Compensation
and a Chip Select
C
1
A1
C
R
A
1
C
f
1
Buffered Non-inverting
1
Integrator Circuit with Active
CS
from op amp A and drives the
MCP6295
CS
MCP6295
B
A2
V
f
OUT
is used
V
OUT
3.8.3.6
Figure 3-15 is a second-order multiple feedback low-
pass filter with chip select. Use the Filterlab
from Microchip to determine the R and C values for the
op amp A’s second-order filter. Op amp B can be used
to add a pole-zero pair using C
FIGURE 3-15:
Feedback Low-Pass Filter with an Extra Pole-
Zero Pair and Chip Select.
3.8.3.7
Figure 3-16 is a second-order Sallen-Key low-pass
filter with chip select. Use the Filterlab
Microchip to determine the R and C values for the op
amp A’s second-order filter. Op amp B can be used to
add a pole-zero pair using C
FIGURE 3-16:
Low-Pass Filter with an Extra Pole-Zero Pair and
Chip Select.
V
V
IN
IN
R
R
C
4
3
2
R
R
Second-Order MFB Low-Pass Filter
with an Extra Pole-Zero Pair
Second-Order Sallen-Key Low-Pass
Filter with an Extra Pole-Zero Pair
R
C
3
2
R
R
2
1
5
4
R
1
C
Second-Order Multiple
Second-Order Sallen-Key
R
C
2004 Microchip Technology Inc.
A
2
A
1
1
MCP6295
3
and R
MCP6295
3
CS
and R
R
R
CS
6
5
5
.
6
®
.
C
software from
C
B
B
3
3
®
software
V
V
OUT
OUT