Texas Instruments LMC6001BIN/NOPB

Overview

LMC6001BIN/NOPB from Texas Instruments is an ultra-low-input-current CMOS operational amplifier designed for high-impedance signal conditioning in electrometer-grade applications. It delivers 25 fA maximum input bias current (100% tested at 25°C), 22 nV/√Hz input voltage noise at 1 kHz, and 750 μA supply current - enabling precision amplification of photodiode, ion detector, and pH probe signals with minimal leakage-induced error.

For engineers reviewing the LMC6001BIN/NOPB datasheet, LMC6001BIN/NOPB pinout, LMC6001BIN/NOPB application, or LMC6001BIN/NOPB equivalent, key selection criteria include verified 25-fA input current limit, rail-to-rail output swing capability, low 0.13 fA/√Hz current noise, ESD robustness (±2000 V HBM), and compatibility with high-source-impedance transducers up to 2000 MΩ.

Technical Context

The LMC6001BIN/NOPB employs a proprietary CMOS input stage with tightly controlled molding compound to achieve industry-leading 25 fA input current specification - validated via triple testing within the first minute of operation. Its internal integrator-based output stage enables rail-to-rail swing without a push-pull buffer, delivering 4.87 V output high and 0.17 V output low (at V+ = 15 V, RL = 2 kΩ to 2.5 V).

This architecture supports stable operation with capacitive loads when compensated using external pull-up resistors or feed-forward networks, and maintains 50° phase margin and 17 dB gain margin across temperature. Input common-mode range extends from 0 V to V+ − 1.9 V, supporting single-supply configurations down to 4.5 V.

Key Specifications

Pinout & Package

LMC6001BIN/NOPB is supplied in an 8-pin PDIP (plastic dual in-line package) with nominal body size 9.81 mm × 6.35 mm. The package includes internal ESD protection diodes and is rated for operation from –40°C to +85°C junction temperature.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-input-current amplifier applications.

Compared with LMP7721MA/NOPB and ADA4530-1ARZ, the LMC6001BIN/NOPB offers the optimal balance of verified 25-fA performance, 750 μA power efficiency, PDIP manufacturability, and $2.12 unit pricing - making it the preferred choice for volume portable analytical instruments.

Availability

LMC6001BIN/NOPB is available at Aetrix Electronics and suitable for electrometer amplifiers, photodiode preamplifiers, ion detectors, and A.T.E. leakage testing systems requiring stable component supply across industrial, medical, and test-equipment production lifecycles.

Supply support for LMC6001BIN/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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in precision signal chain solutions.

The LMC6001BIN/NOPB belongs to TI's LMC precision op amp family, engineered specifically for ultra-high-impedance sensor interfacing - targeting applications where femtoamp-level input leakage would otherwise dominate measurement error.

FAQ

What is the guaranteed maximum input bias current for LMC6001BIN/NOPB at 25°C?

The LMC6001BIN/NOPB is 100% tested to guarantee ≤25 fA input bias current at 25°C - a hard limit enforced by triple measurement within the first minute of operation. Units exceeding this threshold, even transiently, are rejected. This specification is documented in Section 6.5 of the SNOS694I datasheet and applies strictly to the LMC6001BIN/NOPB PDIP variant.

Does LMC6001BIN/NOPB support single-supply operation, and what is its minimum supply voltage?

Yes, the LMC6001BIN/NOPB supports true single-supply operation from 4.5 V to 15.5 V, as specified in Section 6.3 (Recommended Operating Conditions). At 4.5 V, it maintains functional output swing (VO low ≤ 0.45 V, VO high ≥ 4.2 V) and 25 fA input current compliance - enabling use in 5 V battery-powered pH meters and handheld gas analyzers without level-shifting circuitry.

How does LMC6001BIN/NOPB achieve rail-to-rail output swing without a conventional output buffer?

The LMC6001BIN/NOPB uses a direct integrator-stage output topology instead of a push-pull buffer. This design provides both low output impedance and high open-loop gain while avoiding crossover distortion. As confirmed in Section 7.3.1, this architecture enables 0.17 V to 4.87 V swing at V+ = 15 V (RL = 2 kΩ), delivering full dynamic range in single-supply sensor interfaces without sacrificing linearity or speed.

Can LMC6001BIN/NOPB drive capacitive loads, and what compensation is required?

The LMC6001BIN/NOPB can drive ≥100 pF capacitive loads when stabilized using either a pull-up resistor to V+ (conducting ≥500 μA) or a feed-forward capacitor (C_f) across the feedback network. Section 8.1.2 confirms this behavior, and Figure 20 shows a validated noninverting gain-of-10 configuration. Direct capacitive loading without compensation reduces phase margin and causes ringing - verified in Figure 18 (Stability vs. Capacitive Load).

Is LMC6001BIN/NOPB pin-compatible with other variants in the LMC6001 family, such as LMC6001BIM/NOPB?

No - LMC6001BIN/NOPB (PDIP-8) is not pin-compatible with LMC6001BIM/NOPB (SOIC-8) or LMC6001H/NOPB (TO-99-8). While all share identical electrical functionality and pin functions (e.g., +IN on Pin 3), the PDIP package has different mechanical dimensions, lead pitch (2.54 mm vs. 1.27 mm), and thermal characteristics (R_θJA = 100°C/W vs. 160°C/W for SOIC). PCB layout must be redesigned for each package variant.