Texas Instruments LMC6464AIM

Overview

LMC6464AIM from Texas Instruments is a quad micropower rail-to-rail input and output CMOS operational amplifier optimized for low-voltage, battery-powered systems. It delivers 20 μA/amplifier supply current, 0.25 mV input offset voltage, 85 dB CMRR at 5V, rail-to-rail output swing within 10 mV of rails (RL = 25 kΩ), and 150 fA input bias current - enabling high-accuracy signal conditioning in portable medical sensors and transducer interfaces.

For engineers reviewing the LMC6464AIM datasheet, LMC6464AIM pinout, LMC6464AIM application, or LMC6464AIM equivalent, key selection criteria include ultra-low quiescent current at 3V/5V operation, guaranteed rail-to-rail common-mode range (−0.1 V to V_S + 0.3 V), output drive capability into 25 kΩ loads, and validated performance across −40°C to +85°C industrial temperature range.

Technical Context

The LMC6464AIM employs a CMOS input stage with gate-oxide-protected MOSFETs to achieve 150 fA typical input current and rail-to-rail input common-mode voltage range extending 0.1 V beyond both supply rails. Its output stage uses complementary push-pull architecture to deliver rail-to-rail swing with sourcing/sinking capability up to ±27 mA at 5V.

It operates over 3.0 V to 15.5 V single-supply range and ensures DC precision via 0.25 mV max input offset voltage (AI grade), 1.5 μV/°C offset drift, and 85 dB min CMRR at V_S = 5V - making it suitable for high-impedance sensor front-ends where leakage and offset stability are critical.

Key Specifications

Pinout & Package

LMC6464AIM is housed in a 14-pin SOIC (D package) with standard quad op-amp pinout. The package measures 8.65 mm × 3.91 mm × 1.75 mm and features gull-wing leads compatible with automated SMT assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad micropower op-amp applications.

Compared with TLV2464IDR and OPA2333PWR, the LMC6464AIM uniquely balances femtoamp input current, sub-millivolt offset, and micropower operation - making it irreplaceable in long-life, high-impedance, low-voltage sensing nodes where all three parameters are simultaneously constrained.

Availability

LMC6464AIM is available at Aetrix Electronics and suitable for battery-operated circuits, transducer interface circuits, and portable communication devices requiring stable component supply across extended production lifecycles.

Supply support for LMC6464AIM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in precision op-amps and low-power signal chain solutions.

The LMC6464AIM belongs to TI's micropower rail-to-rail op-amp family, designed specifically for energy-constrained, high-impedance sensor signal conditioning in portable and industrial instrumentation.

FAQ

What is the maximum supply voltage rating for the LMC6464AIM?

The LMC6464AIM has an absolute maximum supply voltage (V+ − V−) of 16 V, with recommended operating range from 3.0 V to 15.5 V. Exceeding 16 V risks permanent damage. At 15.5 V operation, output swing remains rail-to-rail (within 50 mV of rails at RL = 25 kΩ), and supply current increases to 120 μA per amplifier - verified in TI's SNOS725D datasheet Section 6.2.

Does the LMC6464AIM support true rail-to-rail input beyond the supply rails?

Yes. The LMC6464AIM guarantees rail-to-rail input common-mode voltage range extending −0.1 V below V− and +0.3 V above V+ at 5 V supply, with no phase inversion. This is confirmed in Figure 33 and Section 7.1 of the SNOS725D datasheet. Operation beyond these limits risks excessive input current unless externally limited to ±5 mA via series resistors.

Can the LMC6464AIM drive capacitive loads directly?

The LMC6464AIM can typically drive up to 200 pF capacitively at unity gain without oscillation when powered at 5 V. For larger loads (e.g., 300 pF), TI recommends resistive isolation (Figure 36) or feedback compensation (Figure 38) to maintain phase margin. Direct capacitive loading degrades pulse response and may cause ringing - details are in Section 9.2 of SNOS725D.

What is the guaranteed input offset voltage specification for LMC6464AIM over temperature?

The LMC6464AIM (AI grade) guarantees input offset voltage ≤0.5 mV over −40°C to +85°C, with typical value of 0.25 mV at 25°C. Its average drift is 1.5 μV/°C, resulting in ≤0.35 mV total offset variation across the full temperature range - specified in Table 1 (DC Electrical Characteristics) of SNOS725D Rev D.

Is the LMC6464AIM pin-compatible with other TI quad op-amps like the LM324 or TLC27L4?

No. The LMC6464AIM uses a 14-pin SOIC package with non-standard pinout: outputs on pins 3/7/11/12 and dual supplies on pins 4 (V−) and 14 (V+). LM324 (14-pin DIP/SOIC) places V+ on pin 4 and V− on pin 11; TLC27L4 uses different output and supply pin assignments. PCB redesign is required for substitution - confirmed by TI package drawings D (SOIC-14) and P (PDIP-14) in the LMC6464AIM datasheet Addendum.