SHC298

Supply Voltage ............................................................. ±18V
Power Dissipation (Package Limitation) ...................... 500mV
Junction Temperature, TJ MAX
AM ............................................................................ 125°C
JP, JU ........................................................................ 100°C
Operating Temperature Range .................. 25°C to +85°C
Storage Temperature Range .................... 65°C to +150°C
Input Voltage ...................................... Equal to Supply Voltage
Logic-to-Logic Reference Differential Voltage(1) ..... +7V, 30V
Output Short Circuit Duration .................................... Indefinite
Hold Capacitor Short Circuit Duration .................................. 10s
Lead Temperature (soldering, 10s) ................................ 300°C

NOTE: (1) Although the differential voltage may not exceed the limits given,the common-mode voltage on the logic pins may be equal to the supply voltages without causing damage to the circuit. For proper logic operation,however, one of the logic pins must always be at least 2V below the positive supply and 3V above the negative supply.

The SHC298 and SHC298A are high-performance monolithic sample/hold amplifiers featuring high DC accuracy with fast acquisition times and a low droop rate. Dynamic performance and holding performance can be optimized with proper selection of the external holding capacitor. With a 1000pF holding capacitor,12-bit accuracy can be achieved with a 6ms acquisition time. Droop rates less than 5mV/min are possible with a 1F holding capacitor.

These sample/holds will operate over a wide supply voltage ranging from ±5V to ±18V with very little change in performance. A separate Offset Adjust pin is used to adjust the offset in either the Sample on the Hold modes. The fully differential logic inputs have low input current, and are compatible with TTL, 5V CMOS, and CMOS logic families.The SHC298AM is available in a hermetically sealed 8-pin TO-99 package and is specified over a temperature range from 25°C to +85°C. The SHC298JP and SHC298JU are 8-pin plastic DIP and SOIC packaged parts specified over 0°C to +70°C.

The SHC298AJP, specified over 0°C to +70°C, is available in an 8-pin plastic DIP. The SHC298A grade features improved gain and offset error, improved drift over temperature, and faster acquisition time.

The SHC298 family is a price-performance bargain. It is well suited for use with several 12-bit A/D converters in data acquisition systems, data distribution systems, and analog delay circuits.