XTR111_07 BURR-BROWN [Burr-Brown Corporation], XTR111_07 Datasheet - Page 13

• Manufacturer Part Number: XTR111_07
• Description: Precision Voltage-to-Current Converter/Transmitter
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

DYNAMIC PERFORMANCE
The rise time of the output current is dominated by the gate
capacitance of the external FET.
The accuracy of the current mirror relies on the dynamic
matching of multiple individual current sources. Settling to
full resolution may require a complete cycle lasting around
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NOTE: Scale has been changed
from Figure 3 and Figure 4.
Figure 3. Output Noise without Filter into 500Ω
Figure 4. Output with 10nF Parallel to 500Ω
Figure 5. Output with Additional Filter
20 µ s/div
20 µ s/div
20 µ s/div
100µs. Figure 3 shows an example of the ripple generated
from the individual current source values that average to
the specified accuracy over the full cycle.
The output glitch magnitude depends on the mismatch of
the internal current sources. It is approximately
proportional to the output current level and scales directly
with the load resistor value. It will slightly differ from part to
part.
External FET
External FET
External FET
SBOS375 − NOVEMBER 2006
C
10nF
F
500Ω
10kΩ
R
No Filter
500Ω
Load Capacitor
Typical Filter
F
500Ω
C
10nF
XTR111
F
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