MCP6V02-E/SN Microchip Technology, MCP6V02-E/SN Datasheet - Page 21

• Manufacturer Part Number: MCP6V02-E/SN
• Description: IC OPAMP AUTO-ZERO DUAL 8SOIC
• Manufacturer: Microchip Technology

Specifications of MCP6V02-E/SN

• Slew Rate: 0.5 V/µs
• Package / Case: 8-SOIC (3.9mm Width)
• Amplifier Type: Chopper (Zero-Drift)
• Number Of Circuits: 2
• Output Type: Rail-to-Rail
• Gain Bandwidth Product: 1.3MHz
• Current - Input Bias: 1pA
• Voltage - Input Offset: 2µV
• Current - Supply: 300µA
• Current - Output / Channel: 22mA
• Voltage - Supply, Single/dual (±): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Number Of Channels: 2
• Common Mode Rejection Ratio (min): 130 dB
• Input Offset Voltage: 0.002 mV
• Input Bias Current (max): 1 pA
• Operating Supply Voltage: 3 V, 5 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Shutdown: No
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Technology: CMOS
• Voltage Gain Db: 156 dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4.0
The MCP6V01/2/3 family of auto-zeroed op amps is
manufactured using Microchip’s state of the art CMOS
process. It is designed for low cost, low power and high
precision applications. Its low supply voltage, low
quiescent current and wide bandwidth makes the
MCP6V01/2/3 ideal for battery-powered applications.
FIGURE 4-1:
4.1.1
The Null Amp. and Main Amp. are designed for high
gain and accuracy using a differential topology. They
have an auxiliary input (bottom left) used for correcting
the offset voltages. Both inputs are added together
internally. The capacitors at the auxiliary inputs (C
and C
operation.
The Output Buffer is designed to drive external loads at
the V
voltage (V
All of these switches are make-before-break in order to
minimize glitch-induced errors. They are driven by two
clock phases (φ
mode and auto-zeroing mode.
The clock is derived from an internal R-C oscillator
running at a rate of f
output is divided down to the desired rate. It is also
randomized to minimize (spread) undesired clock
tones in the output.
© 2008 Microchip Technology Inc.
OUT
H
V
V
) hold the corrected values during normal
IN
IN
APPLICATIONS
pin. It also produces a single ended output
REF
+
–
BUILDING BLOCKS
is an internal reference voltage).
1
Switches
and φ
Input
Null
C
OSC1
Simplified Auto-zeroed Op Amp Functional Diagram.
H
2
) that select between normal
= 300 kHz. The oscillator’s
Switches
Correct
φ
Amp.
Null
Null
1
φ
2
Switches
Output
C
Null
FW
FW
φ
φ
1
2
Amp.
Main
4.1
Figure 4-1
MCP6V01/2/3 auto-zeroed op amps. This will be used
to explain how the DC voltage errors are reduced in this
architecture.
The internal POR ensures the part starts up in a known
good state. It also provides protection against power
supply brown out events.
The Chip Select input places the op amp in a low power
state when it is high. When it goes low, it powers the op
amp at its normal level and starts operation properly.
The Digital Control circuitry takes care of all of the
housekeeping details of the switching operation. It also
takes care of Chip Select and POR events.
Control
Digital
POR
CS
Overview of Auto-zeroing
Operation
shows a simplified diagram of the
V
NC
REF
MCP6V01/2/3
Randomization
Output
Oscillator
Buffer
Clock
DS22058C-page 21
V
OUT