MCP6L04T-E/ST Microchip Technology, MCP6L04T-E/ST Datasheet - Page 12

• Manufacturer Part Number: MCP6L04T-E/ST
• Description: IC OPAMP 1.0MHZ 1.8V 14-TSSOP
• Manufacturer: Microchip Technology

Specifications of MCP6L04T-E/ST

• Slew Rate: 0.6 V/µs
• Amplifier Type: General Purpose
• Number Of Circuits: 4
• Output Type: Rail-to-Rail
• Gain Bandwidth Product: 1MHz
• Current - Input Bias: 2pA
• Voltage - Input Offset: 1000µV
• Current - Supply: 85µA
• Current - Output / Channel: 20mA
• Voltage - Supply, Single/dual (±): 1.8 V ~ 6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP
• Op Amp Type: General Purpose
• No. Of Amplifiers: 4
• Bandwidth: 1MHz
• Supply Voltage Range: 1.8V To 6V
• Amplifier Case Style: TSSOP
• No. Of Pins: 14
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: MCP6L04T-E/STTR

MCP6L01/1R/1U/2/4
4.4
With this family of operational amplifiers, the power
supply pin (V
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 other nearby analog parts.
4.5
An unused op amp in a quad package (e.g., MCP6L04)
should be configured as shown in
circuits prevent the output from toggling and causing
crosstalk. Circuit A sets the op amp at its minimum
noise gain. The resistor divider produces any desired
reference voltage within the output voltage range of the
op amp; the op amp buffers that reference voltage.
Circuit B uses the minimum number of components
and operates as a comparator, but it may draw more
current.
FIGURE 4-3:
4.6
In applications where low input bias current is critical,
PCB (printed circuit board) surface leakage effects
need to be considered. Surface leakage is caused by
humidity, dust or other contamination on the board.
Under low humidity conditions, a typical resistance
between nearby traces is 10
cause 5 pA of current to flow; this is greater than this
family’s bias current at +25°C (1 pA, typical).
The easiest way to reduce surface leakage is to use a
guard ring around sensitive pins (or traces). The guard
ring is biased at the same voltage as the sensitive pin.
Figure 4-4
DS22140A-page 12
V
¼ MCP6L04 (A)
DD
R
R
V
1
2
Supply Bypass
Unused Op Amps
PCB Surface Leakage
REF
shows an example of this type of layout..
DD
=
V
for single supply) should have a local
V
DD
DD
⋅
------------------
R
Unused Op Amps.
1
R
+
2
R
V
12
2
REF
Ω. A 5V difference would
¼ MCP6L04 (B)
Figure
V
DD
4-3. These
FIGURE 4-4:
Layout.
1.
2.
4.7
4.7.1
The MCP6L01/1R/1U/2/4 op amp’s low input bias
current makes it possible for the designer to use larger
resistors and smaller capacitors for active low-pass
filter
increases, the noise generated also increases. Para-
sitic capacitances and the large value resistors could
also modify the frequency response. These trade-offs
need to be considered when selecting circuit elements.
Figure 4-5
100 Hz cutoff frequency and a gain of +1 V/V. The
component values were selected using Microchip’s
FilterLab
to a more common range.
FIGURE 4-5:
V
Inverting Amplifiers
pedance Gain Amplifiers (convert current to
voltage, such as photo detectors).
a)
b)
Non-inverting Gain and Unity-Gain Buffer.
a)
b)
IN
applications.
Guard Ring
®
11.3 kΩ
Connect the guard ring to the non-inverting
input pin (V
to the same reference voltage as the op
amp’s input (e.g., V
Connect the inverting pin (V
with a wire that does not touch the PCB sur-
face.
Connect the guard ring to the inverting input
pin (V
common mode input voltage.
input with a wire that does not touch the
PCB surface.
Application Circuit
Connect the non-inverting pin (V
software; the capacitor values were reduced
R
shows a second-order Bessel filter with
ACTIVE LOW-PASS FILTER
1
IN
–); this biases the guard ring to the
20.5 kΩ
68 pF
IN
However,
R
Example Guard Ring
+); this biases the guard ring
Bessel Filter.
2
C
© 2009 Microchip Technology Inc.
V
(Figure
2
IN
100 pF
– V
C
DD
1
MCP6L01
IN
/2 or ground).
+
4-4) and Transim-
as
IN
–) to the input
the
IN
+) to the
resistance
V
OUT