Texas Instruments LMC662AIM/NOPB

Overview

LMC662AIM/NOPB from Texas Instruments is a dual CMOS rail-to-rail output operational amplifier optimized for single-supply precision signal conditioning. It delivers 126dB open-loop voltage gain, ultra-low 2fA input bias current, and 1.1V/μs slew rate across 4.75V–15.5V supply range-enabling high-impedance buffering in medical instrumentation front-ends.

For engineers reviewing the LMC662AIM/NOPB datasheet, LMC662AIM/NOPB pinout, LMC662AIM/NOPB application, or LMC662AIM/NOPB equivalent, this device supports precision current-to-voltage conversion, long-term integration, sample-and-hold circuits, and peak detection where input leakage < 4fA and rail-to-rail swing into 600Ω loads are critical selection criteria.

Technical Context

The LMC662AIM/NOPB employs a proprietary CMOS front-end topology with differential input stage extending common-mode range to V− and enabling true rail-to-rail output swing-even under 600Ω load. Its gain architecture maintains >100V/mV open-loop gain at 15V supply while sourcing/sinking into low-impedance loads.

Input offset voltage is trimmed to ±3mV (max) over –40°C to +85°C, with drift limited to ±1.3μV/°C; voltage noise is 22nV/√Hz at 1kHz and input resistance exceeds 1TΩ-making it suitable for sensor interfaces where DC accuracy and minimal loading dominate design constraints.

Key Specifications

Pinout & Package

LMC662AIM/NOPB is housed in an 8-pin SOIC (D package) with standard dual op-amp pinout. The package measures 3.91mm × 4.90mm × 1.75mm (body), features gull-wing leads, and is RoHS-compliant and lead-free (NOPB suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual precision op-amp applications.

Compared with LMC662AIM/NOPB, LMC6062IMX/NOPB trades rail-to-rail output and low-noise performance for micropower operation, while OPA2333AIDR delivers near-zero drift at the cost of supply voltage range and higher cost-making LMC662AIM/NOPB optimal for 5–15V precision analog front-ends requiring both low leakage and wide output swing.

Availability

LMC662AIM/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal conditioning, and portable test equipment requiring stable component supply with guaranteed long-term availability.

Supply support for LMC662AIM/NOPB 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 expertise in precision op-amps and low-power signal chain solutions.

The LMC66x family was designed specifically for single-supply, high-impedance precision applications-including medical diagnostics, environmental sensing, and scientific instrumentation-where rail-to-rail output and femtoampere input bias are mandatory.

FAQ

What is the maximum capacitive load the LMC662AIM/NOPB can drive without oscillation?

The LMC662AIM/NOPB becomes unstable with capacitive loads >100pF in unity-gain configuration. Stability is restored by adding a 50Ω–100Ω series resistor at the output and a 5pF–10pF feedback capacitor from output to inverting input. For loads >1nF, a pullup resistor to V+ (≥500μA current) is recommended. These values are validated in TI's SNOSC51D datasheet Figure 6-3 and Figure 6-4.

Does the LMC662AIM/NOPB support dual-supply operation?

Yes, the LMC662AIM/NOPB operates from dual supplies of ±2.375V to ±7.75V, as specified in Section 5.3 Recommended Operating Conditions. Input common-mode range includes V−, and rail-to-rail output swing functions symmetrically around midsupply-enabling use in traditional split-rail lab equipment and audio line drivers.

What is the guaranteed input offset voltage specification for LMC662AIM/NOPB over temperature?

The LMC662AIM/NOPB (AI grade) guarantees input offset voltage of ±3.3mV maximum over the full –40°C to +85°C operating range, per Table 5.6 Electrical Characteristics. At room temperature (25°C), typical VOS is ±1mV with a maximum of ±3mV.

Can the LMC662AIM/NOPB be used as a direct replacement for LM358 in existing designs?

The LMC662AIM/NOPB is pin-compatible with LM358 in 8-pin SOIC and PDIP packages and offers superior input resistance (>1TΩ vs 2MΩ), lower input bias current (2fA vs 45nA), and higher slew rate (1.1V/μs vs 0.6V/μs). However, its minimum supply voltage is 4.75V versus LM358's 3V, so 3.3V-only designs require validation.

How does the LMC662AIM/NOPB achieve rail-to-rail output with CMOS technology?

The LMC662AIM/NOPB uses a patented CMOS output stage with complementary P- and N-channel MOSFETs biased to conduct near the supply rails. Unlike conventional CMOS op-amps, its output transistors are sized and driven to minimize saturation voltage-achieving 150mV headroom at 2kΩ and 600mV at 600Ω, as verified in Table 5.6 VO specifications.