MC33078-EP Datasheet, PDF (14/19 Pages) Texas Instruments – DUAL HIGH-SPEED LOW-NOISE OPERATIONAL AMPLIFIER

MC33078-EP
DUAL HIGH-SPEED LOW-NOISE OPERATIONAL AMPLIFIER
SLOS495 – OCTOBER 2006
APPLICATION INFORMATION
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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
(R_L = 600 Ω, C_L = 380 pF)
PULSE RESPONSE
(R_L = 2 kΩ, C_L = 560 pF)
PULSE RESPONSE
(R_L = 10 kΩ, C_L = 590 pF)
Maximum capacitance
before oscillation = 380 pF
Maximum capacitance
before oscillation = 560 pF
Maximum capacitance
before oscillation = 590 pF
250 ns per Division
PULSE RESPONSE
(R_O = 0 Ω, C_O = 1000 pF, R_L = 2 kΩ)
250 ns per Division
PULSE RESPONSE
(R_O = 4 Ω, C_O = 1000 pF, R_L = 2 kΩ)
250 ns per Division
PULSE RESPONSE
(R_O = 35 Ω, C_O = 1000 pF, R_L = 2 kΩ)
250 ns per Division
5V
–5 V
250 ns per Division
15 V
R_O
–15 V
C_L
250 ns per Division
V_O
R_L = 2 kΩ
Figure 2. Output Characteristics
14
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