MCP651EV-VOS Microchip Technology, MCP651EV-VOS Datasheet - Page 11

• Manufacturer Part Number: MCP651EV-VOS
• Description: BOARD EVAL OP AMP MCP651
• Manufacturer: Microchip Technology
• Series: mCal Technologyr

Specifications of MCP651EV-VOS

• Channels Per Ic: 1 - Single
• Amplifier Type: General Purpose
• Output Type: Single-Ended, Rail-to-Rail
• Slew Rate: 30 V/µs
• Current - Output / Channel: 100mA
• Operating Temperature: -40°C ~ 125°C
• Current - Supply (main Ic): 6mA
• Voltage - Supply, Single/dual (±): 2.5 V ~ 5.5 V
• Board Type: Fully Populated
• Utilized Ic / Part: MCP651
• Processor To Be Evaluated: MCP651
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 2.5 V to 5.5 V
• Tool Type: Evaluation Board
• Core Architecture: PIC
• Cpu Core: PIC
• Data Bus Width: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

TABLE 1-2:
© 2009 Microchip Technology Inc.
R1, R2
R3
R4
R5, R6
R7, R8
C2
U1
U2
R11, R12
R13, R14
U3, R11, R12, C6
U3, R17, C7
U4, R23, R24, R25, R26, S2
R28, C12
Note 1:
Complete Schematic
Components
Switch S2’s top position is closed when to the right (LOW GAIN), and is open when to the left (HI GAIN).
CONVERSION OF SCHEMATIC COMPONENTS
1.4.2
Figure 1-2 is a simplified diagram of the circuitry that biases the DUT and produces an
amplified version of the DUT’s input offset voltage (V
a Proportional plus Integral (PI) controller loop, a high gain amplifier and a filter.
FIGURE 1-2:
The elements of Figure 1-2 correspond to the components in the complete schematic
(A.3 “Board – Schematic”) as follows.
V
M
Simplified Schematic
“Lowpass Filter (ω
Lowpass
Simplified Circuit and Operation
Filter
“Integrator (ω
Component
“+1 Buffer” —
Simplified Circuit.
“1/G
+2.5V
-2.5V
“DUT” —
INT
G
“G
BW
M
R
R
R
INT
/s)” ω
R
R
C
M
12
56
78
)” ω
3
4
2
” = R11 / (R11 + R12)
” = 1 + R24 / R23
ω
= R1 || R2
= R3
= R4
= R5 + R6
= R7 + R8
= C2
= R13 / (R13 + R14)
= 1 + (R24 + R25 + R26) / R23
INT
INT
BW
R
= 1 / (R17 · C7)
= 1 / ((R11 || R12)C6)
= 1 / (R28 · C12)
56
V
Conversion
Equations
Integrator
CMX
(ω
+2.5V
INT
-2.5V
= 0V
/s)
R
R
3
4
OST
R
DUT
R
). It includes gain at the input,
12
C
78
2
1/G
1/G
—
—
≈ 196.1Ω
≈ 200.0Ω
≈ 10.00 kΩ
≈ 8.04 kΩ
≈ 40.0 kΩ
≈ 22 nF
≈ 1 / (3.213 V/V)
≈ 1 / (3.213 V/V)
≈ 2π (10.3 Hz)
≈ 2π (10.4 Hz)
≈ 3.941 V/V, S2 closed
≈ 39.18 V/V, S2 open
≈ 2π (1.59 Hz)
INT
INT
Typical Values
+2.5V
(Note 1)
-2.5V
DS51834A-page 7
V
V
V
+1
DDI
OUTX
SSI
V
COX