LMC662CM/NOPB National Semiconductor, LMC662CM/NOPB Datasheet - Page 10

• Manufacturer Part Number: LMC662CM/NOPB
• Description: IC OP AMP DUAL CMOS 8-SOIC
• Manufacturer: National Semiconductor

Specifications of LMC662CM/NOPB

• Amplifier Type: General Purpose
• Number Of Circuits: 2
• Output Type: Rail-to-Rail
• Slew Rate: 1.1 V/µs
• Gain Bandwidth Product: 1.4MHz
• Current - Input Bias: 0.002pA
• Voltage - Input Offset: 1000µV
• Current - Supply: 750µA
• Current - Output / Channel: 40mA
• Voltage - Supply, Single/dual (±): 4.75 V ~ 15.5 V, ±2.38 V ~ 7.75 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Number Of Channels: 2
• Voltage Gain Db: 126.02 dB
• Common Mode Rejection Ratio (min): 63 dB
• Input Voltage Range (max): 15.5 V
• Input Voltage Range (min): 4.75 V
• Input Offset Voltage: 6 mV at 5 V
• Operating Supply Voltage: 5 V, 9 V, 12 V, 15 V
• Supply Current: 1.6 mA at 5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Details
• Other names: *LMC662CM; *LMC662CM/NOPB; LMC662CM

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Application Hints
BIAS CURRENT TESTING
The test method of Figure 11 is appropriate for bench-testing
bias current with reasonable accuracy. To understand its
operation, first close switch S2 momentarily. When S2 is
opened, then
FIGURE 11. Simple Input Bias Current Test Circuit
(Continued)
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A suitable capacitor for C2 would be a 5 pF or 10 pF silver
mica, NPO ceramic, or air-dielectric. When determining the
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
x
is the stray capacitance at the + input.
b
−, the leakage of the capacitor and socket