LF198JAN
www.ti.com SNOSAJ2A – FEBRUARY 2005 – REVISED MARCH 2013 LF198JAN Monolithic Sample-and-Hold Circuits
Check for Samples: LF198JAN 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 …
