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Bandwidth |
- |
DC to 1 MHz at 100 Vpp and 350 pF load |
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Amplification |
- |
20 times, fixed |
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Load |
type |
resistive || capacitive |
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SOA |
max 450 pF |
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Impedance |
input |
100 kohm || 10 pF |
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output |
<0.1 ohm in the linear mode |
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Voltage |
input |
nominal ±8 V |
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absolute maximum |
12 V peak |
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output |
320Vpp guaranteed (each amplifier) |
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Current |
output |
100 mA continuous, 170 mA peak |
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Slew Rate |
output |
better than 300 V/µs at 350 pF load |
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Operating Ambient Temperature |
0°C to 30°C |
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Storage Temperature |
0°C to 60°C |
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Relative Humidity |
up to 90% (operation), 30% to 50% (storage) |
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Power Requirements |
100/110 V or 220/230 V, 50/60 Hz |
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Fuse |
100/110 V: 3.15 A (slow), 220/230 V: 2 A (slow) |
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Dimensions (H/W/L) |
102 x 257 x 262 (mm) |
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Weight |
4 kg |
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Country of Origin |
Sweden |
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The input amplitude should normally be kept within ±8 V and not exceed ±12 V. This is most important since the input protection network will limit the signal amplitude and cause distortion. The input protection network effectively cuts accidental spikes and overshoots. It is equipped with a fuse rated at 15 mA, which will be blown if the input voltage exceeds 300% of the nominal. Spare fuse is provided inside the instrument case. Input voltages between 8 and 10 V will not harm the amplifier, but the output signal will be distorted.
The amplifier is intended to drive resistive and/or small capacitive loads. The maximum capacitive load depends on the slew rate of the amplifier. This is normally set at the factory to 330 V/µs which yields the load limit of 450 pF. This limit includes the capacitance of the connection cable (ca 100 pF/m for a standard coaxial cable). Increasing the capacitive load causes overshoot to appear. If a larger capacitive load is required then the slew should be reduced accordingly. Such an adjustment can be made before shipment. It may also be performed at a later date by qualified personnel and the factory should be contacted for advice. Inside the cabinet exist hazardous voltage levels and the amplifier circuit is extremely sensitive to static discharge.
Overloading the output may cause an overshoot which might be dangerous for connected devices.
The amplifier cannot be used to drive inductive load.
The continuous output current limit is 100 mA and the output power limit is 10 W (total power dissipation is then 16 W), which corresponds to Safe Operating Area (SOA). The temporary peak current may be up to 170 mA. The output is equipped with a current limiting circuit which withstands accidental short-circuits. It, however, does not constitute sufficient protection against prolonged short-circuiting or overload.
The amplifier may be overheated when the output is short-circuited for a longer time.
The following three figures present the measurements of the worst case power dissipation as a function of frequency, load and input amplitude, respectively.
The frequency response to 50% and 100% of the input amplitude and with 450 pF load is shown in the following diagram:
