MCP606T-I/SN Microchip Technology, MCP606T-I/SN Datasheet - Page 13
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MCP606T-I/SN
Manufacturer Part Number
MCP606T-I/SN
Description
IC OPAMP 2.5V R-R 8SOIC
Manufacturer
Microchip Technology
Specifications of MCP606T-I/SN
Slew Rate
0.08 V/µs
Amplifier Type
General Purpose
Number Of Circuits
1
Output Type
Rail-to-Rail
Gain Bandwidth Product
155kHz
Current - Input Bias
1pA
Voltage - Input Offset
250µV
Current - Supply
18.7µA
Current - Output / Channel
17mA
Voltage - Supply, Single/dual (±)
2.5 V ~ 6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Op Amp Type
Low Power
No. Of Amplifiers
1
Bandwidth
155kHz
Supply Voltage Range
2.5V To 5.5V
Amplifier Case Style
SOIC
No. Of Pins
8
Number Of Channels
1
Voltage Gain Db
121 dB
Common Mode Rejection Ratio (min)
75 dB
Input Offset Voltage
0.25 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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCP606T-I/SN
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
MCP606T-I/SN
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
4.7.2
Sensors that produce an output current and have high
output impedance can be connected to a transimped-
ance amplifier. The transimpedance amplifier converts
the current into voltage. Photodiodes are one sensor
that produce an output current.
The key op amp characteristics that are needed for
these circuits are: low input offset voltage, low input
bias current, high input impedance and an input
common mode range that includes ground. The low
input offset voltage and low input bias current support
a very low voltage drop across the photodiode; this
gives the best photodiode linearity. Since the
photodiode is biased at ground, the op amp’s input
needs to function well both above and below ground.
4.7.2.1
Figure 4-6 shows a transimpedance amplifier with a
photodiode (D
across D
sensing.
As light impinges on D
a current to flow in the reverse bias direction of D
op amp’s negative feedback forces the voltage across
the D
into voltage. Capacitor C
helps
capacitance is large.
FIGURE 4-6:
mode) and Transimpedance Amplifier.
4.7.2.2
Figure 4-6 shows a transimpedance amplifier with a
photodiode (D
(D
applications.
As light impinges on D
a current to flow in the reverse bias direction of D
Placing a negative bias on D
junction capacitance, which allows the circuit to
© 2005 Microchip Technology Inc.
1
Light
is reverse biased), which is used for high-speed
1
to be nearly 0V. Resistor R
stabilize
1
), which is used for precision photodiode
I
D1
PHOTODIODE AMPLIFIERS
Photo-Voltaic Mode
Photo-Conductive Mode
1
1
) biased in the Photo-voltaic mode (0V
) biased in the Photo-conductive mode
the
D
V
1
OUT
Photodiode (in Photo-voltaic
1
1
, charge is generated, causing
circuit
, charge is generated, causing
MCP606
=
2
limits the bandwidth and
I
V
1
D1
C
R
DD
significantly reduces its
2
2
R
when
2
2
converts the current
D
1
’s
V
junction
OUT
1
. The
1
.
operate at a much higher speed. This reverse bias also
increases the dark current and current noise, however.
Resistor R
C
when D
FIGURE 4-7:
conductive mode) and Transimpedance
Amplifier.
4.7.3
The two op amp instrumentation amplifier shown in
Figure 4-8 serves the function of taking the difference
of two input voltages, level-shifting it and gaining it to
the output. This configuration is best suited for higher
gains (i.e., gain > 3 V/V). The reference voltage (V
is typically at mid-supply (V
environment.
FIGURE 4-8:
Amplifier.
The key specifications that make the MCP606/7/8/9
family appropriate for this application circuit are low
input bias current, low offset voltage and high common-
mode rejection.
V
2
REF
limits the bandwidth and helps stabilize the circuit
V
V
Light
2
1
1
V OUT
’s junction capacitance is large.
2
I
R
D1
TWO OP AMP INSTRUMENTATION
AMPLIFIER
converts the current into voltage. Capacitor
1
VB
=
V 1 V 2
D
MCP606/7/8/9
V
R
1
–
MCP607
OUT
2
Photodiode (in Photo-
Two op amp Instrumentation
R
½
V
G
⎛
⎜
⎝
B
1
MCP606
=
+
I
R
0
V
R 1
------
R 2
D1
DD
C
R
DD
2
2
2
R
/2) in a single-supply
+
2
2R 1
--------- -
R G
DS11177D-page 13
⎞
⎟
⎠
R
MCP607
+
1
V REF
½
V
OUT
V
OUT
REF
)