MCP619-I/ST Microchip Technology, MCP619-I/ST Datasheet - Page 19

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

Specifications of MCP619-I/ST

• Amplifier Type: General Purpose
• Number Of Circuits: 4
• Output Type: Rail-to-Rail
• Slew Rate: 0.08 V/µs
• 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
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP
• 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: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Details

4.9.3
A classic, three-op amp instrumentation amplifier is
illustrated in
provide differential signal gain and a common mode
gain of +1. The output op amp is a difference amplifier,
which converts its input signal from differential to a
single-ended output; it rejects common mode signals at
its input. The gain of this circuit is simply adjusted with
one resistor (R
typically referenced to mid-supply (V
supply applications.
FIGURE 4-11:
Instrumentation Amplifier.
© 2008 Microchip Technology Inc.
V
V
2
1
V OUT
THREE OP AMP
INSTRUMENTATION AMPLIFIER
R
Figure
=
G
R
R
G
MCP617
MCP617
(
). The reference voltage (V
2
2
V 1 V 2
½
½
–
4-11. The two-input op amps
Three-Op Amp
) 1
R
R
⎛
⎜
⎝
3
3
+
2R
---------
R G
2
⎞ R
⎟
⎠
R
R
⎛
⎜
⎝
MCP616
----- -
R
4
4
4
3
⎞
⎟
⎠
DD
+
V REF
/2) in single-
V
V
OUT
REF
REF
) is
4.9.4
In
a high gain to the input signal (V
offset voltage makes this an accurate circuit.
The MCP606 is configured as a unity-gain buffer. It
isolates the MCP616’s output from the load, increasing
the high gain stage’s precision. Since the MCP606 has
a higher output current, and the two amplifiers are
housed in separate packages, there is minimal change
in the MCP616’s offset voltage due to loading effect.
FIGURE 4-12:
Load Isolation.
Figure
V
IN
4-12, the MCP616 op amp, R
PRECISION GAIN WITH GOOD
LOAD ISOLATION
R
1
V OUT
MCP616/7/8/9
R
=
MCP616
Precision Gain with Good
2
V
IN
(
1
+
R
IN
2
). The MCP616’s low
⁄
R
MCP606
DS21613C-page 19
1
)
1
and R
V
2
OUT
provide