MC33078
DUAL HIGH-SPEED LOW-NOISE OPERATIONAL AMPLIFIER
SLLS633C–OCTOBER 2004–REVISED NOVEMBER 2006
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APPLICATION INFORMATION
Output Characteristics
All operating characteristics are specified with 100-pF load capacitance. The MC33078 can drive higher
capacitance loads. However, as the load capacitance increases, the resulting response pole occurs at lower
frequencies, causing ringing, peaking, or oscillation. The value of the load capacitance at which oscillation
occurs varies from lot to lot. If an application appears to be sensitive to oscillation due to load capacitance,
adding a small resistance in series with the load should alleviate the problem (see Figure 2).
PULSE RESPONSE
(RL = 600 Ω, CL = 380 pF)
PULSE RESPONSE
(RL = 2 kΩ, CL = 560 pF)
PULSE RESPONSE
(RL = 10 kΩ, CL = 590 pF)
Maximum capacitance
before oscillation = 380 pF
Maximum capacitance
before oscillation = 590 pF
Maximum capacitance
before oscillation = 560 pF
250 ns per Division
250 ns per Division
250 ns per Division
PULSE RESPONSE
(RO = 0 Ω, CO = 1000 pF, RL = 2 kΩ)
PULSE RESPONSE
(RO = 4 Ω, CO = 1000 pF, RL = 2 kΩ)
PULSE RESPONSE
(RO = 35 Ω, CO = 1000 pF, RL = 2 kΩ)
250 ns per Division
250 ns per Division
250 ns per Division
15 V
RO
VO
5 V
–5 V
–15 V
CL
RL = 2 kΩ
Figure 2. Output Characteristics
14
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