MCP651EV-VOS Microchip Technology, MCP651EV-VOS Datasheet - Page 23

• 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

3.1
3.2
© 2009 Microchip Technology Inc.
INTRODUCTION
RANGE OF PARTS SUPPORTED BY MCP651 INPUT OFFSET EVALUATION
BOARD
This chapter shows how to modify the MCP651 Input Offset Evaluation Board to
measure other single op amps from Microchip Technology Inc. Items discussed in this
chapter include:
• Range of Parts Supported by the MCP651 Input Offset Evaluation Board
• Changes to Accommodate Other DUTs
Only op amps that fall within a certain performance range are supported by the
MCP651 Input Offset Evaluation Board.
3.2.1
In order to keep op amps U3 and U4 operating normally, the DUT’s V
EQUATION 3-1:
More accurate op amps need higher gain for good resolution. Table 3-1 shows what
V
TABLE 3-1:
Note 1:
OS
Where:
Chapter 3. Possible Modifications
specs can be supported for different voltmeter resolutions and amplifier gains.
High Gain = 1998 V/V
Low Gain = 201 V/V
2:
Voltmeter Resolution
These results assume a minimum measurement resolution of 1% of the V
The DUT needs to be soldered to the PCB when the maximum V
±50 µV, or so. Inserting a PDIP-8 part into a 8-pin socket creates a contact potential
(error) of the order of ±1 µV. Also, 1/f noise needs to be low.
Input Offset Voltage
0.1 mV
LOWER LIMIT ON V
1 mV
(mV)
V
V
OS
OS
<
<
±
±
12.4 mV, Low Gain
1.25 mV, High Gain
OS
MCP651 INPUT OFFSET
RANGE (NOTE 1)
EVALUATION BOARD
1998 (high gain)
1998 (high gain)
201 (low gain)
201 (low gain)
G
(V/V)
A
G
M
USER’S GUIDE
OST
OS
DS51834A-page 19
max(V
5 (Note 2)
must be:
(±µV)
is less than
500
50
50
OS
OS
) ≥
range.