LMC660CN/NOPB National Semiconductor, LMC660CN/NOPB Datasheet - Page 10

• Manufacturer Part Number: LMC660CN/NOPB
• Description: IC OP AMP QUAD CMOS 14-DIP
• Manufacturer: National Semiconductor

Specifications of LMC660CN/NOPB

• Amplifier Type: General Purpose
• Number Of Circuits: 4
• 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: 1.5mA
• 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: Through Hole
• Package / Case: 14-DIP (0.300", 7.62mm)
• Bandwidth: 1.4 MHz
• Channel Separation: 130
• Common Mode Rejection Ratio: 83
• Current, Input Bias: 0.002 pA
• Current, Input Offset: 0.001 pA
• Current, Output: 40 mA
• Current, Supply: 0.75 mA
• Harmonic Distortion: 0.01 %
• Impedance, Thermal: 101 °C/W
• Number Of Amplifiers: Dual
• Package Type: MDIP-8
• Resistance, Input: 1 Teraohms
• Temperature, Operating, Range: 0 to +70 °C
• Voltage, Gain: 2000 V/mV
• Voltage, Input: 4.75 to 15.5 V
• Voltage, Noise: 22 nV/sqrt Hz
• Voltage, Offset: 1 mV
• Voltage, Output, High: 14.63 V
• Voltage, Output, Low: 0.26 V
• Voltage, Supply: 5 V
• Number Of Channels: 4
• Voltage Gain Db: 126.02 dB
• Common Mode Rejection Ratio (min): 63 dB
• Input Offset Voltage: 6 mV at 5 V
• Operating Supply Voltage: 5 V, 9 V, 12 V, 15 V
• Supply Current: 2.7 mA at 5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device
• Other names: *LMC660CN; *LMC660CN/NOPB; LMC660; LMC660CN

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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
FIGURE 8. Simple Input Bias Current Test Circuit
FIGURE 7. Air Wiring
(Continued)
00876722
00876721
10
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