Purchase LF398,, In-stock LF398, From SeekIC.
Part Number: LF398,
Description: The LF198/LF298/LF398 are monolithic sample-and-hold circuits which utilize BI-FET technology to obtai...
- Table of contents:
LF398,
-
Suppliers
DataSheet
General Description
LF398, General Description
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 accom- plished with a single pin, and does not degrade input offset drift. The wide bandwidth allows the LF198 to be included in- side the feedback loop of 1 MHz op amps without having sta- bility problems. Input impedance of 1010 Ω 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 witha1µF 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.
Logic inputs on the LF198 are fully differential with low input current, allowing direct connection to TTL, PMOS, and CMOS. Differential threshold is 1.4V. The LF198 will operate from ±5V to ±18V supplies.
An "A" version is available with tightened electrical specifications.
LF398, Maximum Ratings
If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales ffice/Distributors for availability and specifications.
Supply Voltage ±18V
Power Dissipation (Package
Limitation) (Note 2) 500 mW
Operating Ambient Temperature Range
LF198/LF198A −55˚C to +125˚C
LF298 −25˚C to +85˚C
LF398/LF398A 0˚C to +70˚C
Hold Capacitor Short
Circuit Duration 10 sec
Lead Temperature (Note 4)
H package (Soldering, 10 sec.) 260˚C
N package (Soldering, 10 sec.) 260˚C
M package:
Vapor Phase (60 sec.) 215˚C
Infrared (15 sec.) 220˚C
Thermal Resistance (JA) (typicals)
H package 215˚C/W (Board mount in still air)
85˚C/W (Board mount in
400LF/min air flow)
N package 115˚C/W
M package 106˚C/W
JC (H package, typical) 20˚C/W
Storage Temperature Range −65˚C to +150˚C
Input Voltage Equal to Supply Voltage
Logic To Logic Reference
Differential Voltage (Note 3) +7V, −30V
Output Short Circuit Duration Indefinite
LF398, Features
·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, JM38510
·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, JM38510
LF305-S
PDF/DataSheet Download
- Datasheet: LF305-S
- File Size: 133350 KB
- Manufacturer: LEM [LEM]
- Click here to Download
- ·LF30AB
- STMICROELECTRONICS [STMicroelectronics]
- VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
- 665160 KB
- ·LF30ABDT
- STMICROELECTRONICS [STMicroelectronics]
- VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
- 665160 KB
- ·LF30ABP
- STMICROELECTRONICS [STMicroelectronics]
- VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
- 665160 KB
- ·LF30ABPT
- STMICROELECTRONICS [STMicroelectronics]
- VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
- 665160 KB
- ·LF30ABV
- STMICROELECTRONICS [STMicroelectronics]
- VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
- 266548 KB
- ·LF30ABV5V
- STMICROELECTRONICS [STMicroelectronics]
- VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
- 266548 KB
- ·LF30C
- STMICROELECTRONICS [STMicroelectronics]
- VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
- 266548 KB
- ·LF30CDT
- STMICROELECTRONICS [STMicroelectronics]
- VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
- 665160 KB
LF398, Relative Products
LF398
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 acqu...
LF35V
LF35H
LF35ABDT-TR
IC REG VLDO 500MA 3.5V D-PAK
LF357
These are the first monolithic JFET LF357 input operational ampli- fiers to incorporate well matched, high voltage JFETs on the same chip with standard bipolar transistors (BI-FET™ Tech- nology). These LF357 feature low input bias and offset currents/l...
LF356N/NOPB
IC OP AMP MONO WB JFET IN 8-DIP
Hotspot Suppliers Product
HD74LS86P
Price: 0.1-0.2 USD
Quadruple, 2-input, Exclusive-OR Gate, DIP, 7 V, 400 mW, Hitachi Ltd
TQ2SADC4.5V
Price: 1.2-3 USD
low-profile surface-mount relay, SMD, 2A, 4.5V, TQ2SADC4.5V, Nais
SAA7826HL
Price: 1-1 USD
IC DIGITAL/CD DAC DECODER 80LQFP - SAA7826HL
STK433-270
Price: 0.02-0.5 USD
hybrid IC, HYB, ±54V
LM2594HVM-ADJ+
Price: 2.7-3.6 USD
LM2594HVM-ADJ+, Simple switcher, 8-SOIC, 150 kHz, 0.5A, 45V
NTMFS4119NT1G
Price: 1-1.1 USD
Power MOSFET, 30 V, 30 A, Single N-Channel, SO-8 Flat Lead, Low Inductance, Pb-Free, Low RDS(on)
IRL3103SPBF
Price: 0.2-0.25 USD
Advanced HEXFET Power MOSFET, TO-263, 64A, 94W, Advanced Process Technology, Fast Switching
MOCD207R1M
Price: 0.25-0.28 USD
dual channel phototransistor, optocoupler, 2 channel, T-OUT, 8-SOIC, 60mA
82C54FP6
Price: 0.98-1.3 USD
82C54FP6,MITSUBISH,SOP24
SF200BA10
Price: 55-65 USD
200A, 630W, power module
LP62S4096EX-70LLTF
Price: 1-10 USD
low operating current, 4,194,304-bit, static random access memory, TSOP
CRCW060320K5FKEA
Price: 0.1-100 USD
SMD, standard thick film chip resistor, 0.10 W, 20.5K Ω, Halogen-free, Vishay Siliconix
