LF298 |
RFQ for LF298 Required Field |
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| Technical/Catalog Information | LF298M/NOPB |
| Vendor | National Semiconductor |
| Category | Integrated Circuits (ICs) |
| Packaging | Tube |
| Amplifier Type | Sample and Hold |
| Number of Circuits | 1 - Single |
| Package / Case | 14-SOIC (3.9mm Width), 14-SOL |
| Slew Rate | - |
| Gain Bandwidth Product | - |
| Current - Supply | 4.5mA |
| Current - Output / Channel | - |
| Voltage - Supply, Single/Dual (±) | ±5 V ~ 18 V |
| Output Type | - |
| -3db Bandwidth | - |
| Current - Input Bias | 5nA |
| Operating Temperature | -25°C ~ 85°C |
| Voltage - Input Offset | 1000V |
| Drawing Number | 14; M14A; ; 14 |
| Lead Free Status | Lead Free |
| RoHS Status | RoHS Compliant |
| Other Names | LF298M NOPB LF298MNOPB LF298M ND LF298MND LF298M |
| Product | Manufacturers | Pack | D/C |
| LF298 | National Semiconductor | - | - |
The LF198/LF298/LF398 are monolithic sample-and-hold circuits which utilize BI-FET technology to obtain ultra-high dc accuracy with fast acquisition of signal and low droop rate. Operating as a unity gain follower, dc gain accuracy is 0.002% typical and acquisition time is as low as 6 µs to 0.01%. A bipolar input stage is used to achieve low offset voltage and wide bandwidth. Input offset adjust is accomplished with a single pin, and does not degrade input offset drift. The wide bandwidth allows the LF198 to be included inside the feedback loop of 1 MHz op amps without having stability problems. Input impedance of 1010Ohm allows high source impedances to be used without degrading accuracy.
P-channel junction FET's are combined with bipolar devices in the output amplifier to give droop rates as low as 5 mV/min with a 1 µF hold capacitor. The JFET's have much lower noise than MOS devices used in previous designs and do not exhibit high temperature instabilities. The overall design guarantees no feed-through from input to output in the hold mode, even for input signals equal to the supply voltages.
| Part Number | Process | EFR Reject | EFR Sample Size | PPM | LTA Rejects | LTA Device Hours | FITS | MTTF (Hours) | ||||
| LF298H | BIFET | 0 | 12335 | 0 | 0 | 975000 | 4 | 276658912 | ||||
| LF298M | BIFET | 0 | 12335 | 0 | <||||||||
| Temperature Min | -25 deg C |
| Temperature Max | 85 deg C |
| Offset Voltage max, 25C | 5 mV |
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