LF198QML
www.ti.com SNOSAH9A – FEBRUARY 2005 – REVISED MARCH 2013 LF198QML Monolithic Sample-and-Hold Circuits
Check for Samples: LF198QML FEATURES DESCRIPTION The LF198 is a monolithic sample-and-hold circuit
which utilizes 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 Ојs 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 1010О© allows
high source impedances to be used without
degrading accuracy. 1 2 Operates from В±5V to В±18V supplies
Less than 10 Ојs acquisition time
TTL, PMOS, CMOS compatible logic input
0.5 mV typical hold step at Ch = 0.01 ОјF
Low input offset
0.002% gain accuracy
Low output noise in hold mode
Input characteristics do not change during …
