Summary of Microchip zero-drift op amp is low power for medical
The MCP6V11/31 family are Microchip zero-drift single operational amplifiers offering very low input offset (max 8 µV) and low offset drift (50 nV/°C). They feature no 1/f noise, good CMRR/PSRR, unity-gain stability, and low-power operation from a single 1.6 V supply. MCP6V11 has 80 kHz GBW and 7.5 µA quiescent current; MCP6V31 has 300 kHz GBW and 23 µA quiescent current. Available in 5-pin SOT-23 and 5-pin SC-70 packages, suited for low-power medical diagnostic systems.
Parts used in the MCP6V11/31 op amp project:
- MCP6V11 operational amplifier (single, zero-drift)
- MCP6V31 operational amplifier (single, zero-drift)
- 5-pin SOT-23 package (for MCP6V11/31)
- 5-pin SC-70 package (for MCP6V11/31)
Description
The MCP6V11/1U family of operatioinal amplifiers provides input offset voltage correction for very low offset and offset drift. These are low power devices, with a gain bandwidth product of 80 kHz. They are unity gain stable, have no 1/f noise, and provide superior CMRR and PSRR performance. These products operate with a single supply voltage as low as 1.6V with a quiescent current of only 7.5 uA.
Features
- Zero Drift architecture
- Maximum offset of only 8 uV
- Maximum offset drift of 50 nV/C
- No 1/f noise
- Low Power operation
- Small SC-70 and SOT-23 packaging
Microchip has introduced zero-drift operational amplifiers which can operate with a single supply voltage as low as 1.6V and a quiescent current as low as 7.5µA.
For low power medical diagnostic systems the MCP6V11/31 op amps are designed on a self-correcting architecture which provides a maximum input offset voltage of 8µV for low-offset and low-offset drift, enabling maximum accuracy across time and temperature.
The MCP6V11 offers 80kHz of gain bandwidth product, with a low typical quiescent current of only 7.5µA.
The MCP6V31 provides 300kHz of gain bandwidth product, coupled with a low typical quiescent current of 23µA.
These single amplifiers are available in small 5-pin SOT-23 and 5-pin SC-70 packages.
For more read: Microchip zero-drift op amp is low power for medical
- What is the maximum input offset voltage of these op amps?
The maximum input offset voltage is 8 uV according to the article. - Do these amplifiers exhibit 1/f noise?
No, the article states they have no 1/f noise. - What is the minimum supply voltage for operation?
They can operate with a single supply voltage as low as 1.6 V. - What is the quiescent current of the MCP6V11?
The MCP6V11 has a typical quiescent current of 7.5 uA. - What is the gain bandwidth product of the MCP6V31?
The MCP6V31 provides 300 kHz of gain bandwidth product. - Are these amplifiers unity gain stable?
Yes, the article states they are unity gain stable. - What packaging options are available?
They are available in small 5-pin SOT-23 and 5-pin SC-70 packages. - What is the maximum offset drift specified?
The maximum offset drift is 50 nV/C as given in the article.
