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LT1204 Datasheet(PDF) 9 Page - Linear Technology |
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LT1204 Datasheet(HTML) 9 Page - Linear Technology |
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9 / 20 page  9 LT1204 CC HARA TERISTICS A TYPICALPERFOR CE Disabled and Shutdown Supply Current vs Supply Voltage Settling Time to 1mV vs Output Step Enabled Supply Current vs Supply Voltage SETTLING TIME ( µs) 0 2 6 10 16 1205 G25 –2 –6 –10 4 8 12 20 0 4 8 –4 –8 VS = ±15V RF = RG = 1k 218 6 10 14 SUPPLY VOLTAGE ( ±V) 0 12 13 15 16 17 22 19 4 8 10 18 1204 G26 14 20 21 18 26 12 14 16 25 °C 125 °C –55 °C SUPPLY VOLTAGE ( ±V) 0 0 1 15 16 17 22 19 4 8 10 18 1204 G27 2 20 21 18 26 12 14 16 25 °C 125 °C –55 °C –55 °C, 25°C, 125°C ISHDN S APPLICATI I FOR ATIO specified over a very wide range of conditions. An advan- tage of the current feedback topology used in the LT1204 is well-controlled frequency response. In all cases of the performance table, the peaking is 0.1dB or less. If more peaking can be tolerated, larger bandwidths can be obtained by lowering the feedback resistor. For gains of 2 or less, the 0.1dB bandwidth is greater than 30MHz for all loads and supply voltages. At high gains (low values of RG) the disabled output resistance drops slightly due to loading of the internal buffer amplifier as discussed in Multiplexer Expansion. Logic Inputs The logic inputs of the LT1204 are compatible with all 5V logic. All pins have ESD protection (> 2kV), and shorting them to 12V or 15V will cause excessive currents to flow. Limit the current to less than 50mA when driving the logic above 6V. Power Supplies The LT1204 will operate from ±5V (10V total) to ±15V (30V total) and is specified over this range. It is not necessary to use equal value supplies, however, the offset voltage and inverting input bias current will change. The offset voltage changes about 600 µV per volt of supply mismatch. The inverting bias current changes about 2.5 µA per volt of supply mismatch. The power supplies should be bypassed with quality tantalum capacitors. Feedback Resistor Selection The small-signal bandwidth of the LT1204 is set by the external feedback resistors and internal junction capaci- tors. As a result the bandwidth is a function of the supply voltage, the value of the feedback resistor, the closed- loop gain and the load resistor. These effects are outlined in the resistor selection guide of the Typical AC Perfor- mance table. Bandwidths range as high as 95MHz and are Small-Signal Rise Time, AV = 2 1204 AI01 VS = ±15V RL = 150Ω RF = 1k RG = 1k |
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