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LM146, LM346

www.ti.com

SNOSBH5B –MAY 2004–REVISED SEPTEMBER 2004

LM146/LM346 Programmable Quad Operational Amplifiers

Check for Samples: LM146, LM346

FEATURES

DESCRIPTION

The LM146 series of quad op amps consists of four

• (I

SET

=10 μA)

independent, high gain, internally compensated, low

• Programmable Electrical Characteristics

power, programmable amplifiers. Two external

• Battery-Powered Operation

resistors (R

SET

) allow the user to program the gain

bandwidth product, slew rate, supply current, input

• Low Supply Current: 350 μA/Amplifier

bias current, input offset current and input noise. For

• Ensured Gain Bandwidth Product: 0.8 MHz Min

example, the user can trade-off supply current for

• Large DC Voltage Gain: 120 dB

bandwidth or optimize noise figure for a given source

resistance. In a similar way, other amplifier

• Low Noise Voltage: 28 nV/√Hz

characteristics can be tailored to the application.

• Wide Power Supply Range: ±1.5V to ±22V

Except for the two programming pins at the end of

• Class AB Output Stage–No Crossover

the package, the LM146 pin-out is the same as the

Distortion

LM124 and LM148.

• Ideal Pin Out for Biquad Active Filters

• Input Bias Currents are Temperature

Compensated

Connection Diagram

Figure 1. Dual-In-Line Package - Top View

See Package Number NFE0016A, D0016A or N16A

PROGRAMMING EQUATIONS

Total Supply Current = 1.4 mA (I

SET

/10 μA)

Gain Bandwidth Product = 1 MHz (I

SET

/10 μA)

Slew Rate = 0.4V/μs (I

SET

/10 μA)

Input Bias Current ≃≃ 50 nA (I

SET

/10 μA)

SET

= Current into pin 8, pin 9 (see Schematic Diagram)

(1)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

UNLESS OTHERWISE NOTED this document contains

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (24 pages)

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LM146, LM346 www.ti.com SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 LM146/LM346 Programmable Quad Operational Amplifiers Check for Samples: LM146, LM346 FEATURES DESCRIPTION 1 • • • • • • • • • 2 • • (ISET=10 μA) Programmable Electrical Characteristics Battery-Powered Operation Low Supply Current: 350 μA/Amplifier Ensured Gain Bandwidth Product: 0.8 MHz Min Large DC Voltage Gain: 120 dB Low Noise Voltage: 28 nV/√Hz Wide Power Supply Range: ±1.
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LM146, LM346 SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 www.ti.com Capacitorless Active Filters (Basic Circuit) These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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LM146, LM346 www.ti.com SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 DC ELECTRICAL CHARACTERISTICS (VS=±15V, ISET=10 µA) (1) Parameter Conditions LM146 Min LM346 Typ Max Min Typ Max Units Input Offset Voltage VCM=0V, RS≤50Ω, TA=25°C 0.5 5 0.5 6 mV Input Offset Current VCM=0V, TA=25°C 2 20 2 100 nA Input Bias Current VCM=0V, TA=25°C 50 100 50 250 nA Supply Current (4 Op Amps) TA=25°C 1.4 2.0 1.4 2.
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LM146, LM346 SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 www.ti.com DC ELECTRICAL CHARACTERISTICS (VS=±1.5V, ISET=10 μA) Parameter Conditions LM146 Min Input Offset Voltage VCM=0V, RS≤50Ω, TA=25°C Input CM Range TA=25°C CM Rejection Ratio RS≤50Ω, TA=25°C Output Voltage Swing RL≥10 kΩ, TA=25°C 4 LM346 Typ Max 0.5 5 ±0.7 Min Typ Max 0.5 7 ±0.7 80 ±0.6 Submit Documentation Feedback mV V 80 ±0.
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LM146, LM346 www.ti.com SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs ISET Supply Current vs ISET Figure 2. Figure 3. Open Loop Voltage Gain vs ISET Slew Rate vs ISET Figure 4. Figure 5. Gain Bandwidth Product vs ISET Phase Margin vs ISET Figure 6. Figure 7.
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LM146, LM346 SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) 6 Input Offset Voltage vs ISET Common-Mode Rejection Ratio vs ISET Figure 8. Figure 9. Power Supply Rejection Ratio vs ISET Open Voltage Swing vs Supply Voltage Figure 10. Figure 11. Input Voltage Range vs Supply Voltage Input Bias Current vs Input Common-Mode Voltage Figure 12. Figure 13.
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LM146, LM346 www.ti.com SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Input Bias Current vs Temperature Input Offset Current vs Temperature Figure 14. Figure 15. Supply Current vs Temperature Open Loop Voltage Gain vs Temperature Figure 16. Figure 17. Gain Bandwidth Product vs Temperature Slew Rate vs Temperature Figure 18. Figure 19.
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LM146, LM346 SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) 8 Input Noise Voltage vs Frequency Input Noise Current vs Frequency Figure 20. Figure 21. Power Supply Rejection Ratio vs Frequency Voltage Follower Pulse Response Figure 22. Figure 23. Voltage Follower Transient Response Transient Response Test Circuit Figure 24. Figure 25.
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LM146, LM346 www.ti.com SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 APPLICATION HINTS Avoid reversing the power supply polarity; the device will fail. COMMON-MODE INPUT VOLTAGE The negative common-mode voltage limit is one diode drop above the negative supply voltage. Exceeding this limit on either input will result in an output phase reversal. The positive common-mode limit is typically 1V below the positive supply voltage. No output phase reversal will occur if this limit is exceeded by either input.
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LM146, LM346 SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 www.ti.com LM146 TYPICAL PERFORMANCE SUMMARY The LM146 typical behaviour is shown in Figure 28. The device is fully predictable. As the set current, ISET, increases, the speed, the bias current, and the supply current increase while the noise power decreases proportionally and the VOSremains constant. The usable GBW range of the op amp is 10 kHz to 3.5−4 MHz. Figure 28.
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LM146, LM346 www.ti.com SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 Typical Applications Figure 30. Dual Supply or Negative Supply Blasing Figure 31.
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LM146, LM346 SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 www.ti.com • The LM334 provides an ISET directly proportional to absolute temperature. This cancels the slight GBW product Temperature coefficient of the LM346. Figure 32. Current Source Biasing with Temperature Compensation • For ISET1≃ISET2 resistors R1 and R2 are not required if a slight error between the 2 set currents can be tolerated. If not, then use R1 = R2 to create a 100 mV drop across these resistors. Figure 33.
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LM146, LM346 www.ti.com SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 Active Filters Applications Figure 34. Basic (Non-Inverting “State Variable”) Active Filter Building Block Note. All resistor values are given in ohms.
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LM146, LM346 SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 www.ti.com • If resistive biasing is used to set the LM346 performance, the Qo of this filter building block is nearly insensitive to the op amp's GBW product temperature drift; it has also better noise performance than the state variable filter. Figure 35. A Simple-to-Design BP, LP Filter Building Block Circuit Synthesis Equations •For the eventual use of amplifier C, see comments above. (2) Figure 36.
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LM146, LM346 www.ti.com SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 Circuit Synthesis Equations •For nothing but a notch output: RIN=R, C′=C. (3) Figure 37. Capacitorless Active Filters (Basic Circuit) 1. Pick up a convenient value for b; (b < 1) 2. Adjust Qo through R5 3. Adjust Ho(BP) through R4 4. Adjust fo through RSET. This adjusts the unity gain frequency (fu) of the op amp.
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LM146, LM346 SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 www.ti.com Ex: fc = 20 kHz, Ho (gain of the filter) = 1, Q01 = 0.541, Qo2 = 1.306. •Since for this filter the GBW product of all 4 amplifiers has been designed to be the same (∼1 MHz) only one current source can be used to bias the circuit. Fine tuning can be further accomplished through Rb. Figure 38. A 4th Order Butterworth Low Pass Capacitorless Filter Miscellaneous Applications • For better performance, use a matched NPN pair. Figure 39.
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LM146, LM346 www.ti.com SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 • By pulling the SET pin(s) to V− the op amp(s) shuts down and its output goes to a high impedance state. According to this property, the LM346 can be used as a very low speed analog switch. Figure 40. Circuit Shutdown Figure 41.
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LM146, LM346 SNOSBH5B – MAY 2004 – REVISED SEPTEMBER 2004 www.ti.com • CMRR: 100 dB (typ) • Power dissipation: 0.4 mW Figure 42.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device LM346MX/NOPB Package Package Pins Type Drawing SOIC D 16 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 16.4 Pack Materials-Page 1 6.5 B0 (mm) K0 (mm) P1 (mm) 10.3 2.3 8.0 W Pin1 (mm) Quadrant 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM346MX/NOPB SOIC D 16 2500 367.0 367.0 35.
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