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Product Detailed Parameters
- Description：IC OPAMP GP 32 CIRCUIT 100MQFP
- Series：-
- Mfr：Microchip Technology
- Package：Tray
- Amplifier Type：General Purpose
- Number of Circuits：32
- Output Type：-
- Slew Rate：2.2V/µs
- Gain Bandwidth Product：-
- Current - Input Bias：-
- Voltage - Input Offset：20 mV
- Current - Supply：-
- Current - Output / Channel：500 µA
- Voltage - Supply Span (Min)：7.5 V
- Voltage - Supply Span (Max)：300 V
- Operating Temperature：-10°C ~ 125°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：100-BQFP
- Supplier Device Package：100-MQFP (20x14)
- -3db Bandwidth：4 kHz
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Overview
The HV257FG-G is a 32-channel high-voltage sample-and-hold amplifier array manufactured by Microchip Technology. It operates on a single high-voltage supply up to 300V and two low-voltage supplies. The device features an internal closed-loop gain of 72V/V, with a typical output slew rate of 2.2V/µs. It accommodates a maximum capacitive load of 3000 pF per channel. The unit is housed in a 100-lead MQFP package.
Feature Summary
- Integrates thirty-two independent high-voltage amplifiers within a single array configuration.
- Features adjustable output current source and sink limits controlled via external resistors.
- Includes an internal five-to-thirty-two logic decoder for individual channel selection.
- Provides an integrated low-voltage silicon junction diode for die temperature monitoring.
Applications
- Microelectromechanical Systems (MEMS) Driver
- Piezoelectric Transducer Driver
- Optical Crosspoint Switches
Procurement Notes
Verify the specific ordering suffix against official documentation to confirm package type and environmental compliance. Ensure that the selected variant matches the required lead-free status and tray packaging quantity. Confirm availability through authorized distribution channels as stock levels fluctuate.
Selection Notes
Select this component when designing circuits requiring simultaneous high-voltage signal sampling across multiple channels. Verify that the system power supply architecture supports the necessary voltage rails and isolation requirements. Evaluate the external resistor values needed to set the desired current limiting thresholds for the specific application load.
Part Context
This part belongs to the HV257 family of high-voltage analog integrated circuits. It serves as a specialized driver array designed for applications demanding precise control over high-voltage signals. The device complements other MEMS drivers and high-voltage switches within the manufacturer's portfolio.
Replacement Considerations
HV256FG-G: 32-Ch MEMS Drvr IC. Note differences in operational voltage ranges and specific amplifier configurations before substitution.
FAQ
How are the output current limits configured?
The maximum sourcing and sinking currents are adjusted using two external resistors connected to the RSOURCE and RSINK pins. The limit is approximately 12.5V divided by the respective resistor value.
What is the function of the BYP pins?
The BYP-VPP, BYP-AVDD, and BYP-AVNN pins provide access to internally generated reference voltages. External capacitors must be connected between these pins and their corresponding power supplies to maintain stable opamp biasing currents.
