Texas Instruments TL081HIDCKR

Overview

TL081HIDCKR from Texas Instruments is a single-channel JFET-input operational amplifier optimized for precision, high-speed analog signal conditioning in industrial and power electronics. It delivers 20 V/μs slew rate, 1 mV typical input offset voltage, 37 nV/√Hz input voltage noise at 1 kHz, ±2.25 V to ±20 V dual-supply operation, and rail-to-rail common-mode input range extending to VCC+. It is used in solar inverter feedback loops, motor drive current sensing, and pro-audio preamplifier stages.

For engineers reviewing the TL081HIDCKR datasheet, TL081HIDCKR pinout, TL081HIDCKR application, or TL081HIDCKR equivalent, this page provides verified electrical specifications, SC70-5 package terminal mapping, real-world use cases in UPS and battery test equipment, and two validated alternative op-amps with documented functional trade-offs.

Technical Context

The TL081HIDCKR employs a JFET-input differential pair enabling ultra-low input bias current (±1 pA typ) and high input impedance (>1 TΩ), critical for high-impedance sensor interfaces. Its internal compensation ensures stable unity-gain operation with up to 300 pF capacitive load drive.

It features integrated EMI/RF filters and 1.5 kV HBM ESD protection, supporting reliable operation across –40°C to +125°C ambient. The device maintains 125 dB open-loop gain and 95 dB CMRR over full temperature range, enabling accurate DC-coupled amplification in noisy environments.

Key Specifications

Pinout & Package

TL081HIDCKR is housed in a 5-pin SC70 (DCK) surface-mount package, measuring 2.0 mm × 1.25 mm × 0.9 mm, optimized for space-constrained PCB layouts in portable test equipment and compact inverters.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar operational amplifier applications.

Compared with TL071HIDCKR and OPA1671IDCKR, the TL081HIDCKR uniquely balances ultra-low input bias current, integrated EMI rejection, and industrial temperature range - making it optimal for cost-sensitive, ruggedized analog front-ends where sensor interface integrity outweighs absolute noise floor minimization.

Availability

TL081HIDCKR is available at Aetrix Electronics and suitable for solar inverter feedback loops, motor drive current sensing, and battery test equipment requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TL081HIDCKR 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The TL08xH family was engineered for high-reliability, cost-sensitive industrial signal conditioning - emphasizing ESD robustness, wide temperature operation, and JFET-input precision in compact packages like SC70.

FAQ

What is the maximum capacitive load the TL081HIDCKR can drive stably?

The TL081HIDCKR is characterized to drive up to 300 pF capacitive load while maintaining phase margin ≥56° and stable small-signal step response. For loads exceeding 300 pF, external isolation resistance (e.g., 10–100 Ω in series with output) is recommended to prevent peaking or oscillation - a requirement confirmed in Section 5.7 of the TL081H datasheet. This capability makes TL081HIDCKR suitable for driving ADC input filters and long PCB traces in motor control boards.

Does the TL081HIDCKR support single-supply operation?

Yes, the TL081HIDCKR supports single-supply operation from 4.5 V to 40 V, per Section 5.3 Recommended Operating Conditions. Its common-mode input range extends to VCC+, allowing input signals referenced to ground or mid-rail without level shifting. However, output swing is limited to ~105–215 mV from each rail - so true rail-to-rail output is not achieved. For single-supply sensor interfaces, proper biasing of IN+ and IN– is required to keep the input within (VCC–)+1.5 V to VCC+.

What is the input bias current specification for TL081HIDCKR at 125°C?

Per Section 5.7 Electrical Characteristics: TL08xH, the input bias current for TL081HIDCKR is specified as ±5 nA maximum over the full –40°C to +125°C operating range. This value reflects worst-case characterization data and applies to all package variants including DCK (SC70). At room temperature, typical IB is ±1 pA - the 5 nA max ensures design margin for high-temperature leakage in battery management systems and solar inverters.

How does the TL081HIDCKR differ from the legacy TL081CP?

The TL081HIDCKR is the enhanced-performance, next-generation variant of the TL081 family. Key improvements include: 1.5 kV HBM ESD rating (vs. 1 kV for TL081CP), integrated EMI/RF filters, tighter offset voltage (±1 mV typ vs. ±3 mV), lower noise (37 nV/√Hz vs. 45 nV/√Hz), and extended temperature range (–40°C to +125°C vs. 0°C to +70°C). It also uses modern SC70 packaging instead of legacy PDIP, reducing board area by >90%.

Is the TL081HIDCKR pin-compatible with other SC70 op-amps like the OPA344?

No, the TL081HIDCKR is not pin-compatible with OPA344 or other generic SC70 op-amps. Its pinout (IN+, VCC–, IN–, VCC+, OUT) follows TI's TL08xH SC70 assignment (Figure 4-2), whereas OPA344 uses IN–, IN+, VCC–, VCC+, OUT. Swapping them without PCB modification will cause incorrect biasing and potential damage. Always verify pin functions using the official TL081HIDCKR datasheet schematic - never assume SC70 package equivalence across manufacturers or families.