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Product Detailed Parameters
- Description：SAMPLE AND HOLD CIRCUIT, 1 FUNC,
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Amplifier Type：-
- Number of Circuits：-
- Output Type：-
- Slew Rate：-
- Gain Bandwidth Product：-
- Current - Input Bias：-
- Voltage - Input Offset：-
- Current - Supply：-
- Current - Output / Channel：-
- Voltage - Supply Span (Min)：-
- Voltage - Supply Span (Max)：-
- Operating Temperature：-
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：14-SOIC
- -3db Bandwidth：-
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Overview
The LF298MX is a monolithic sample-and-hold circuit manufactured by Texas Instruments, formerly National Semiconductor. It features a high-speed FET-input operational amplifier for the track mode and a low-leakage MOSFET switch to isolate the hold capacitor during the hold state. The device provides precise signal acquisition with minimal droop and aperture jitter, suitable for data acquisition systems requiring accurate analog-to-digital conversion timing.
Feature Summary
- Monolithic integration of high-speed tracking amplifier and low-leakage sampling switch
- Low droop rate ensures signal stability during the hold phase
- Fast acquisition time enables high-frequency signal processing
Applications
- Data acquisition systems
- Analog-to-digital converter front-ends
- Signal conditioning circuits
Procurement Notes
Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor's linear products. Confirm the package type matches the MX suffix specifications in the official datasheet. Ensure the component meets the required operating temperature range for the intended application environment before procurement.
Selection Notes
Select this component when a single-chip solution for sample-and-hold functionality is required. Consider the trade-off between acquisition speed and droop performance. Verify that the input voltage range and output drive capability meet the system requirements compared to discrete implementations or alternative integrated circuits.
Part Context
This part belongs to the LFx98 family of monolithic sample-and-hold circuits. It shares functional similarities with the LF198 and LF398 but offers specific performance characteristics tailored for general-purpose data acquisition. The MX suffix indicates a specific surface-mount package variant within the broader product line.
Replacement Considerations
Public confirmed substitute part numbers include LF198MX and LF398MX. These devices share the same core architecture and pinout compatibility. Verify electrical parameter differences such as droop rate and acquisition time against the specific design requirements before substitution.
