LF6197

· Operates with supply voltages from ±5V to ±18V
· CMOS, TTL and ECL compatible logic input
· Adjustable inverting or non-inverting gain
· Internal hold capacitor
· High power-supply rejection in both sample and hold modes

· High-speed data acquisition systems
· Automatic test equipment
· High-speed instrumentation
· Replaces expensive hybrid sample-and-hold amplifiers

Positive Supply Voltage (V⁺)                                     +18V
Negative Supply Voltage (V^-)                                      -18V
Analog Input Voltage                           V⁺ or V^- or ±12.5V,
                                                                whichever is less
Logic Input to LR1 Differential Voltage                         ±5V
Power Dissipation (Note 3)                                         1.2W
Duration of Output Short Circuit to GND                (Note 4)
ESD Susceptibility
    All Pins except Pin 13 (Note 5)                               2000V
    Pin 13 only (Note 5)                                               1500V
Lead Temperature (Soldering, 10 sec.)
    J Package                                                               300
Storage Temperature                                  -65 to a150

The LF6197 is a monolithic sample-and-hold (S/H) amplifier that uses a proprietary "current-multiplexed sample-andhold" technique to offer extremely high speed while maintaining 12 bits or higher accuracy. The device is built using National's advanced junction-isolated VIPTM (Vertically Integrated 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 V/s. 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 capacitor.