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LM146J-LM146J/883-LM346M-LM346MX
Programmable Quad Operational Amplifier
LM146/LM346
Programmable Quad Operational Amplifiers
General DescriptionThe LM146 seriesof quadop amps consistsof four inde-
pendent, high gain, internally compensated, low power, pro-
grammable amplifiers. Two external resistors (RSET) allow
the userto program the gain bandwidth product, slew rate,
supply current, input bias current, input offset current and
input noise. For example, the user can trade-off supply
currentfor bandwidthor optimize noise figurefora given
source resistance.Ina similar way, other amplifier charac-
teristics canbe tailoredtothe application. Exceptforthe two
programming pinsat the endof the package, the LM146
pin-outis the sameasthe LM124 and LM148.
Features(ISET=10 µA) Programmable electrical characteristics Battery-powered operation Low supply current: 350 µA/amplifier Guaranteed gain bandwidth product: 0.8 MHz min Large DC voltage gain: 120dB Low noise voltage: 28 Wide power supply range: ±1.5Vto ±22V ClassAB output stage–no crossover distortion Idealpin outfor Biquad active filters Input bias currents are temperature compensated
Connection Diagram
Dual-In-Line PackageTop View
Order Number LM146J, LM146J/883,
LM346M,LM346MXor LM346N
SeeNS Package Number
J16A, M16Aor N16A
PROGRAMMING EQUATIONS
Total Supply Current= 1.4 mA (ISET/10 µA)
Gain Bandwidth Product=1 MHz (ISET/10 µA)
Slew Rate= 0.4V/µs (ISET/10 µA)
Input Bias Current.50nA (ISET/10 µA)
ISET= Current intopin8,pin9 (see schematic-diagram)
Capacitorless Active Filters (Basic Circuit)August 2000
LM146/LM346
Programmable
Quad
Operational
Amplifiers
