Texas Instruments LMC6035IMQ1

Overview

LMC6035IMQ1 from Texas Instruments is an AEC-Q100 Grade 3 qualified automotive CMOS operational amplifier optimized for single-supply, low-voltage operation (2.0V to 15.5V), delivering rail-to-rail output swing into 600Ω loads, ultra-low input bias current (20 fA typical), and high open-loop gain (126 dB). It serves as a precision buffer or preamplifier in high-impedance sensor signal chains within battery-constrained automotive subsystems.

For engineers reviewing the LMC6035IMQ1 datasheet, LMC6035IMQ1 pinout, LMC6035IMQ1 application, or LMC6035IMQ1 equivalent, this page delivers verified electrical specifications, SOIC-8 pin mapping, automotive-grade thermal and ESD performance data, and real-world filter/driver implementation guidance - all confirmed against TI's SBOSAM6 production datasheet (December 2024 revision).

Technical Context

The LMC6035IMQ1 employs a CMOS input stage enabling femtoampere-level input bias current and wide common-mode range (–0.1 V to +2.3 V at 2.7 V supply), critical for interfacing with high-impedance sources like piezoelectric sensors or pH electrodes. Its rail-to-rail output stage maintains 200 mV headroom at 600 Ω under 2.7 V supply, supporting low-voltage analog front-ends without level-shifting.

It features 1.4 MHz gain-bandwidth product, 1.5 V/µs slew rate, and stable operation with capacitive loads up to 100 pF when compensated per TI's recommended series-R + shunt-C network. The dual-channel architecture enables differential driver configurations with matched channel performance and 130 dB crosstalk rejection at 1 kHz.

Key Specifications

Pinout & Package

LMC6035IMQ1 is housed in an 8-pin SOIC (D package), 4.9 mm × 6.0 mm body size, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance R_θJA is 175°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, low-power, rail-to-rail op amp applications.

Compared with LMC6042IMX/NOPB, the LMC6035IMQ1 trades extended temperature capability for automotive qualification and assured supply-chain traceability; compared with TLV2462IDR, it prioritizes robust 600 Ω drive and noise immunity over minimal quiescent current - making it uniquely suited for safety-critical, low-voltage automotive signal conditioning.

Availability

LMC6035IMQ1 is available at Aetrix Electronics and suitable for automotive cabin sensing, portable medical instrumentation, low-voltage audio driver circuits, and body control module filtering requiring stable component supply across multi-year production cycles.

Supply support for LMC6035IMQ1 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 automotive-grade IC development and manufacturing expertise.

The LMC6035IMQ1 belongs to TI's LMC60xx-Q1 family of AEC-Q100 qualified CMOS op amps, designed specifically for precision, low-power signal conditioning in harsh automotive environments where rail-to-rail operation and femtoampere input leakage are mandatory.

FAQ

What is the maximum capacitive load the LMC6035IMQ1 can drive without oscillation?

The LMC6035IMQ1 remains stable with up to 100 pF capacitive load when configured with TI's recommended compensation: a 50–100 Ω resistor in series with the output and a 5–10 pF capacitor from inverting input to output. Without compensation, instability may occur above ~30 pF in unity-gain follower configurations. This behavior is documented in Section 7.1.1 of the SBOSAM6 datasheet and validated across –40°C to +85°C.

Does the LMC6035IMQ1 support true single-supply operation down to 2.0 V?

Yes, the LMC6035IMQ1 is fully specified and functional at 2.0 V supply voltage, with guaranteed rail-to-rail output swing, 20 fA input bias current, and 1.4 MHz gain-bandwidth product. Electrical characteristics tables in Section 5.5 include 2.7 V, 3 V, 5 V, and 15 V test conditions - and Section 5.3 explicitly lists 2.0 V as the minimum recommended operating voltage. Performance degrades gracefully below 2.7 V, providing design margin.

How does the LMC6035IMQ1 achieve rail-to-rail output swing into 600 Ω at 2.7 V?

The LMC6035IMQ1 achieves 200 mV rail headroom into 600 Ω at 2.7 V via a proprietary CMOS output stage with low R_DS(on) pull-up/pull-down devices. This architecture minimizes voltage drop under load, enabling 2.5 V output swing on a 2.7 V rail - a key differentiator versus older rail-to-rail op amps that degrade significantly below 5 V. Measured performance is confirmed in Figure 5-7 (Output Voltage Swing vs Supply Voltage) of the SBOSAM6 datasheet.

Is the LMC6035IMQ1 pin-compatible with other dual-channel TI op amps in SOIC-8?

No, the LMC6035IMQ1 has a unique pinout optimized for dual-channel symmetry: pins 1/7 are outputs, pins 2/6 are inverting inputs, pins 3/5 are noninverting inputs, and pins 4/8 are supplies. It is not pin-compatible with TLV2462, LMV358, or OPA2333. Substitution requires PCB layout revision. Pin mapping is defined in Table 4-1 and Figure 4-1 of SBOSAM6.

What layout practices are essential to preserve the 20 fA input bias current of the LMC6035IMQ1?

To maintain 20 fA input bias current, implement guard rings around both inputs (pins 2, 3, 5, 6) tied to a low-impedance voltage matching the input common-mode level - typically achieved via a unity-gain buffer. Use clean FR-4 with solder mask over traces, avoid conformal coating near inputs, and isolate input traces from high-voltage or high-humidity zones. These techniques are detailed in Section 7.3.1 and Figures 7-10 through 7-14 of the LMC6035IMQ1 datasheet.