STMicroelectronics TSL6801ILT

Overview

TSL6801ILT from STMicroelectronics is a single, rail-to-rail input/output nanopower operational amplifier optimized for ultra-low-power signal conditioning in space- and energy-constrained systems. It delivers 8 kHz gain bandwidth, 600 nA supply current (typ.), 5 pA max input bias current at 25 °C, and operates from 1.5 V to 5.5 V - enabling use in battery-powered sensor front-ends and portable medical monitors.

For engineers reviewing the TSL6801ILT datasheet, TSL6801ILT pinout, TSL6801ILT application, or TSL6801ILT equivalent, key selection criteria include its sub-1 µA quiescent current, rail-to-rail I/O swing at 1.5 V supply, ±3 mV input offset voltage (max), and guaranteed operation across –40 °C to +85 °C industrial temperature range.

Technical Context

The TSL6801ILT employs a CMOS input stage with chopper-stabilized architecture to achieve nanoscale input bias current (≤5 pA) and low input offset drift (±2 µV/°C), while maintaining unity-gain stability without external compensation. Its 8 kHz GBP and 3 V/ms slew rate are tightly specified under 1.8–5 V supply and load conditions up to 10 kΩ.

Designed for low-voltage precision sensing, it supports common-mode input range extending 0.1 V beyond rails (VCC− – 0.1 V to VCC+ + 0.1 V) and delivers rail-to-rail output swing with ≤40 mV saturation drop at both extremes - critical for maximizing dynamic range in 1.8 V and 3.3 V systems.

Key Specifications

Pinout & Package

SOT23-5 package: 2.9 mm × 2.8 mm × 1.3 mm body, 0.95 mm lead pitch, thermally enhanced for low-power operation in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nanopower op amp applications.

Compared with TSU101ICT, TSL6801ILT offers 300 nA lower quiescent current and tighter input offset (±3 mV vs. ±4.5 mV), making it superior for coin-cell longevity; versus LMC6001AIMX, it enables 1.5 V operation and rail-to-rail output but trades femtoamp bias for nanoamp robustness in real-world PCB leakage environments.

Availability

TSL6801ILT is available at Aetrix Electronics and suitable for wearable health monitors, IoT environmental sensors, and portable medical diagnostics requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TSL6801ILT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The TSL680x series belongs to ST's nanopower precision op amp product line, engineered specifically for cost-sensitive, battery-constrained applications demanding rail-to-rail performance below 1 µA - including wearables, portable diagnostics, and energy-harvesting endpoints.

FAQ

Is the TSL6801ILT unity-gain stable without external compensation?

Yes. The TSL6801ILT is internally compensated for unity-gain stability across its full operating range (1.5–5.5 V, –40 °C to +85 °C). No external capacitors or resistors are required for stable operation in buffer, inverter, or non-inverting configurations - verified per Figure 17 (Bode diagram) and Table 6 (phase margin ≥50° at CL = 60 pF).

What is the maximum capacitive load the TSL6801ILT can drive directly?

The TSL6801ILT can drive up to 60 pF capacitively without isolation resistance, as validated in AC performance testing (CL = 60 pF in Table 6). For loads >100 pF, ST recommends adding an isolation resistor (Riso) between output and load - values range from 10 Ω to 1 kΩ depending on capacitance, per Figure 19 in DS13726.

Does the TSL6801ILT support true rail-to-rail output swing at 1.5 V supply?

Yes. At VCC = 1.5 V, the output swings to within 40 mV of both rails (VOL ≤ 40 mV, VOH ≤ VCC – 40 mV), as confirmed in Table 6 under "Electrical Characteristics" and Figure 10 (output characteristics at 3.3 V, extrapolated and verified down to 1.5 V per design characterization).

How does the TSL6801ILT handle input overvoltage beyond the supply rails?

The TSL6801ILT features phase-reversal-free input stage behavior: even when input exceeds VCC+ or falls below VCC− by up to 0.2 V (per Table 4 absolute ratings), the output remains monotonic and does not invert - demonstrated in Figure 12. This prevents erroneous triggering in fault-tolerant sensor interfaces.