LMC6024IM National Semiconductor, LMC6024IM Datasheet - Page 11

• Manufacturer Part Number: LMC6024IM
• Description: IC, OP-AMP, 350KHZ, 0.11V/µs, SOIC-14
• Manufacturer: National Semiconductor

Specifications of LMC6024IM

• Op Amp Type: Low Power
• No. Of Amplifiers: 2
• Bandwidth: 350kHz
• Slew Rate: 0.11V/µs
• Supply Voltage Range: 5V To 15V
• Amplifier Case Style: SOIC
• No. Of Pins: 14
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Application Hints
(Input pins are lifted out of PC board and soldered directly to components.
All other pins connected to PC board.)
BIAS CURRENT TESTING
The test method of Figure 7 is appropriate for bench-testing
bias current with reasonable accuracy. To understand its
operation, first close switch S2 momentarily. When S2 is
opened, then
A suitable capacitor for C2 would be a 5 pF or 10 pF silver
mica, NPO ceramic, or air-dielectric. When determining the
FIGURE 7. Simple Input Bias Current Test Circuit
FIGURE 6. Air Wiring
(Continued)
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magnitude of I
must be taken into account. Switch S2 should be left shorted
most of the time, or else the dielectric absorption of the
capacitor C2 could cause errors.
Similarly, if S1 is shorted momentarily (while leaving S2
shorted)
where C
Typical Single-Supply Applications
Note 14: A 5V bias on the photodiode can cut its capacitance by a factor of
2 or 3, leading to improved response and lower noise. However, this bias on
the photodiode will cause photodiode leakage (also known as its dark cur-
rent).
(Upper limit of output range dictated by input common-mode range; lower
limit dictated by minimum current requirement of LM385.)
(V
+
= 5.0 V
Photodiode Current-to-Voltage Converter
x
is the stray capacitance at the +input.
DC
Micropower Current Source
−
)
, the leakage of the capacitor and socket
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