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KH231 Datasheet(PDF) 1 Page - Cadeka Microcircuits LLC. |
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KH231 Datasheet(HTML) 1 Page - Cadeka Microcircuits LLC. |
1 / 6 page Features s 165MHz closed-loop – -3dB bandwidth s 15ns settling to 0.05% s 1mV input offset voltage, 10µV/°C drift s 100mA output current s Excellent AC and DC linearity s Direct replacement for CLC231 Applications s Driving flash A/D converters s Precision line driving (a gain of 2 cancels matched-line losses) s DAC current-to-voltage conversion s Low-power, high-speed applications (50mW @ ±5V) General Description The KH231 Buffer/Amplifier is a wideband operational amplifier designed specifically for high-speed, low- gain applications. The KH231 is based on a current feedback op amp topology-a unique design that both eliminates the gain-bandwidth tradeoff and permits unprecedented high-speed performance. (See table below.) The KH231 Buffer/Amplifier is the ideal design alter- native to low precision open-loop buffers and oscillation- prone conventional op amps. The KH231 offers precise gains from ±1.000 to ±-5.000 and linearity that is a true 0.1%-even for demanding 50 Ω loads. Open-loop buffers, on the other hand, offer a nominal gain of 0.95 ±0.03 and a linearity of only 3% for typical loads. A buffer’s settling time may look impressive but it is usually specified at unrealistically large load resis- tances or when the effects of thermal tail are not included; the KH231 Buffer/Amplifier settles to 0.05% in 15ns-while driving a 100 Ω load. Offsets and drifts, usually a low priority in conven- tional high-speed op amp designs, were not ignored in the KH231; the input offset voltage is typically 1mV and input offset voltage drift is only 10 µV/°C. The KH231 is stable and oscillation-free across the entire gain range and since it’s internally compensated, the user is saved the trouble of designing external com- pensation networks and having to “tweak” them in production. The absence of a gain-bandwidth trade- off in the KH231 allows performance to be predicted easily; the table below shows how the bandwidth is affected very little by changing the gain setting. The KH231 is constructed using thin film resistor/bipolar transistor technology, and is available in the following versions: The KH231 is constructed using thin film resistor/bipolar transistor technology, and available in these versions: KH231AI -25°C to +85°C 12-pin TO-8 can KH231AK -55°C to +125°C 12-pin TO-8 can, features burn-in & hermetic testing KH231AM -55°C to +125°C 12-pin TO-8 can, environmentally screened and electrically tested to MIL-STD-883 KH231HXC -55°C to +125°C SMD#: 5962-8959401HXC KH231HXA -55°C to +125°C SMD#: 5962-8959401HXA KH231 Fast Settling, Wideband Buffer/Amplifier (Av = ±1 to ±5) REV. 1A January 2004 Small Signal Pulse Response Time (5ns/div) K Av = -2 Av = 2 Supply Voltage 8 Adjust 7 GND 9 -V CC 2 Adjust 3 GND 1 +V CC 6 V+ 5 V- 4 NC 10 -V CC V o +V CC 11 12 4 4 Collector Supply Output Collector Supply Supply Voltage ICC Adjust ICC Adjust Case ground Non-Inverting Input Inverting Input Not Connected Case ground + - Bottom View Pins 2 and 8 are used to adjust the supply current or to adjust the off- set voltage (see text). These pins are normally left unconnected. Typical Performance Gain Setting Parameter 1 2 5 -1 -2 -5 Units -3dB bandwidth 180 165 130 165 150 115 MHz rise time (2V) 1.8 2.0 2.5 2.0 2.2 2.9 ns slew rate 2.5 3.0 3.0 3.0 3.0 3.0 V/ns settling time (to 0.1%) 12 12 12 12 12 15 ns www.cadeka.com |
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