LF6197 Datasheet, PDF (1/12 Pages) National Semiconductor (TI) – 160 ns Monolithic Sample-and-Hold Amplifier

September 1992
LF6197 160 ns Monolithic Sample-and-Hold Amplifier
General Description
The LF6197 is a monolithic sample-and-hold (S H) amplifier
that uses a proprietary ‘‘current-multiplexed sample-and-
hold’’ technique to offer extremely high speed while main-
taining 12 bits or higher accuracy The device is built using
National’s advanced junction-isolated VIP^TM (Vertically Inte-
grated PNP) and BI-FET^TM process technologies
The LF6197 acquires a 10V step input to within g0 01% in
160 ns and has 10 mV hold step error when going from
sample to hold mode The input offset voltage in the sample
mode is typically 3 mV Even at extremely fast acquisition
speeds no compromises are made in the droop rate which
is 0 6 mV ms When configured for unity gain the DC gain
error is 0 03% The feedthrough attenuation in the hold
mode is 83 dB at DC and 77 dB at 100 kHz
The LF6197 can be externally configured for either inverting
or non-inverting gains thus offering additional flexibility to
the user The device includes an internal 10 pF hold capaci-
tor
BI-FETTM and VIPTM are trademarks of National Semiconductor Corporation
Block Diagram
Features
Y _{Operates with supply voltages from} g_{5V to} g_18V
Y _{CMOS TTL and ECL compatible logic input}
Y _{Adjustable inverting or non-inverting gain}
Y _{Internal hold capacitor}
Y _{High power-supply rejection in both sample and hold}
modes
Key Specifications
Y _{Acquisition time (10V step to 0 01%)}
160 ns
Y _{Hold mode settling time (10V step to 0 01%)}
50 ns
Y _{Droop rate}
0 6 mV ms
Y _{Hold step}
10 mV
Y _{Aperture jitter}
Y _{Feedthrough attenuation at DC}
8 ps_rms
83 dB
Y _{Small signal bandwidth}
25 MHz
Applications
Y _{High-speed data acquisition systems}
Y _{Automatic test equipment}
Y _{High-speed instrumentation}
Y _{Replaces expensive hybrid sample-and-hold amplifiers}
Connection Diagram
C1995 National Semiconductor Corporation TL H 11381
Top View
TL H 11381 – 2
Ordering Information
Industrial
(0 C ^k T_A^k a70 C)
LF6197CCJ
Package
J14A
Ceramic DIP
TL H 11381 – 1
RRD-B30M115 Printed in U S A