LM6182AMN National Semiconductor, LM6182AMN Datasheet - Page 20

• Manufacturer Part Number: LM6182AMN
• Description: Dual 100 mA Output/ 100 MHz Current Feedback Amplifier
• Manufacturer: National Semiconductor

www.national.com
Typical Applications
The LM6182 crosstalk effect is minimized in applications that
cascade the amplifiers by preceding amplifier A with ampli-
fier B.
START-UP TIME
Using the circuit in Figure 13 , the LM6182 demonstrated a
start-up time of 50 ns.
OVERDRIVE RECOVERY
The LM6182 is an excellent choice for high speed applica-
tions needing fast overdrive recovery. Nanosecond recovery
times allow the LM6182 to protect subsequent stages from
excessive input saturation and possible damage.
When the output or input voltage range of a high speed am-
plifier is exceeded, the amplifier must recover from an over-
drive condition. The non-linear output voltage remains as
long as the overdrive condition persists. Linear operation re-
sumes after the overdrive condition is removed. Overdrive
recovery time is the delay before an amplifier returns to lin-
ear operation. The typical recovery times for exceeding open
loop, closed loop, and input commom-mode voltage ranges
are illustrated in Figures 14, 15, 16 .
The open-loop circuit of Figure 14 generates an overdrive re-
sponse by allowing the
put range of the amplifier. Typical positive and negative over-
drive recovery times are 5 ns and 30 ns, respectively.
FIGURE 13. Start-Up Test Circuit
FIGURE 12. Crosstalk Rejection
±
0.5V input to exceed the linear in-
(Continued)
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20
The large closed-loop gain configuration in Figure 15 forces
the amplifier output into overdrive. The typical recovery time
to a linear output value is 15 ns.
FIGURE 14. Open Loop Overdrive Recovery Times of
Recovery Time Generated by Saturating the Output
FIGURE 15. 15 ns Closed Loop Output Overdrive
Stage of the LM6182
5 ns and 30 ns
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