LF398 is a monolithic sample and hold IC that uses bipolar field effect technology (BI-FET) technology to obtain ultrahigh 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 LF398 to be included inside the feedback loop of 1-MHz operational amplifiers without having stability problems. The IC offers a wide range of features such as high noise immunity, ESD barring, and excellent thermal cycling.
What is a Sample & Hold Circuit?
A sample and hold circuit is a simple electronic configuration that is capable of sampling a signal applied at it’s input terminals. The circuit can also hold the sample value sample for a particular time interval hence the name sample and hold. The basic configuration for a sample and hold circuit is an analog switch (JFET, BiMOS, CMOS) and a capacitor. Sample and hold circuits have an integral importance in the telecommunication industry; where, these circuits are used to troubleshoot discrepancies occurring in signal demodulation.
LF398 Pinout
LF398 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | V+ | Positive Power Supply |
| 2 | OFFSET ADJUST | Offset Adjust Pin |
| 3 | INPUT | Input Pin |
| 4 | V- | Negative Power Supply |
| 5 | OUTPUT | Output Pin |
| 6 | Ch | Output Hold Capacitor |
| 7 | LOGIC REF | Logic Reference Pin |
| 8 | LOGIC | Logic Pin |
LF398 Features and Specification
- Operates from ±5V to ±18V supplies
- Less than 10 µs acquisition time
- TTL, PMOS, CMOS compatible logic input
- 0.5 mV typical hold step at Ch = 0.01 µF
- Low input offset
- 0.002% gain accuracy
- Low output noise in hold mode
- Input characteristics do not change during hold mode
- High supply rejection ratio in sample or hold
- Wide bandwidth
- Space qualified
Application
- Signal Processing
- Industrial
- Aerospace
- Defense Military
LF398 Datasheet
You can download this datasheet for LF398 Sample and Hold Circuit from the link given below:
See Also: CD4512 8-Channel Data Selector – Datasheet | CD4543 BCD to 7-Segment Decoder – Datasheet | CD4584 Hex Schmitt Trigger – Datasheet
