Texas Instruments TLV2221IDBVTG4

Overview

TLV2221IDBVTG4 from Texas Instruments is a single rail-to-rail output, very low-power operational amplifier in a 5-pin SOT-23 package. It delivers 130 µA typical supply current, 1.1 MHz gain-bandwidth product, and rail-to-rail output swing (±0.015 V from rails at 50 µA load) for enhanced dynamic range in 2.7–10 V single-supply systems. It is optimized for high-impedance sensor signal conditioning in battery-powered monitoring devices.

For engineers reviewing the TLV2221IDBVTG4 datasheet, TLV2221IDBVTG4 pinout, TLV2221IDBVTG4 application, or TLV2221IDBVTG4 equivalent, key selection criteria include input bias current (±10 pA), input offset voltage (±0.3 mV max), noise performance (30 nV/√Hz at 1 kHz), common-mode input range extending to negative rail, and guaranteed operation down to 2.7 V with full rail-to-rail output capability.

Technical Context

The TLV2221IDBVTG4 uses Advanced LinCMOS™ process technology to achieve ultra-low input bias current and high input impedance (6 TΩ common-mode, 540 GΩ differential), enabling accurate amplification of signals from piezoelectric transducers and other high-Z sources. Its rail-to-rail output stage supports full-swing operation into loads ≥2 kΩ across the entire supply range.

It features internal compensation for unity-gain stability, operates over –40°C to +85°C, and exhibits low 1/f noise (6 µVpp, 0.1–10 Hz) and low THD+N (0.076% at AV = 1, 20 kHz). The device's 4.5 V/µs slew rate and 1.1 MHz GBW support moderate-speed signal acquisition without phase distortion.

Key Specifications

Pinout & Package

The TLV2221IDBVTG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, occupying one-third the PCB area of an SOIC-8. Its optimized pinout separates IN+ and IN− with GND between them to minimize coupling, places OUT adjacent to IN− for compact feedback routing, and positions power pins at opposite ends to reduce supply noise injection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2221IDBVTG4, TLV2211IDBVT trades bandwidth and precision for extreme power savings, while OPA316IDBVR delivers superior AC performance at 3× the quiescent current-making TLV2221IDBVTG4 the optimal balance for 1–10 kHz sensor interfaces with 3 V battery constraints.

Availability

TLV2221IDBVTG4 is available at Aetrix Electronics and suitable for portable medical monitors, industrial wireless sensors, and battery-powered data loggers requiring stable component supply, long-term manufacturability, and guaranteed TI production continuity.

Supply support for TLV2221IDBVTG4 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, embedded processing, and connectivity technologies, with decades of expertise in precision amplifiers and low-power design.

The TLV2221IDBVTG4 belongs to TI's Advanced LinCMOS™ rail-to-rail op-amp family, engineered specifically for high-impedance, low-power signal conditioning in portable and remote sensing applications.

FAQ

What is the operating temperature range for TLV2221IDBVTG4?

The TLV2221IDBVTG4 is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in outdoor environmental sensors, automotive cabin modules, and factory-floor instrumentation where thermal extremes are encountered. All electrical specifications-including input offset voltage, supply current, and output swing-are guaranteed across this full range.

Does TLV2221IDBVTG4 support true rail-to-rail input?

No, TLV2221IDBVTG4 does not support rail-to-rail input. Its common-mode input voltage range extends to the negative rail (VDD−) but stops 1.3 V below the positive rail (VDD+ − 1.3 V) under recommended operating conditions. However, its rail-to-rail *output* swing-within 15 mV of both supply rails at light loads-enables full utilization of ADC reference voltages in single-supply designs using TLV2221IDBVTG4.

Can TLV2221IDBVTG4 drive capacitive loads directly?

TLV2221IDBVTG4 is not unity-gain stable into heavy capacitive loads. It requires isolation resistance (e.g., 50 Ω series resistor) for loads >100 pF to maintain phase margin >45° and avoid overshoot or oscillation. Data sheet Figure 5-54 shows phase margin degrades below 45° at >300 pF with no isolation; therefore, TLV2221IDBVTG4 should be used with RISO or buffered output stages when driving ADC input capacitance or long PCB traces.

What is the maximum output current capability of TLV2221IDBVTG4?

The TLV2221IDBVTG4 can source or sink ±50 mA continuously per Absolute Maximum Ratings, but practical linear output current is limited to ±1 mA while maintaining rail-to-rail swing and low distortion. At ±500 µA load, output voltage remains within 120 mV of the rails (at VDD = 5 V); beyond ±1 mA, output swing compresses significantly. For higher current needs, TLV2221IDBVTG4 must be paired with an external buffer stage.

Is TLV2221IDBVTG4 pin-compatible with other SOT-23 op-amps?

TLV2221IDBVTG4 uses a standard 5-pin SOT-23 pinout (IN+, GND, IN−, OUT, VDD+) aligned with TI's TLV22xx and OPA3xx families. It is pin-compatible with TLV2211IDBVT and OPA316IDBVR, enabling drop-in substitution where bandwidth, noise, and offset requirements align. Always verify layout compatibility-especially decoupling placement and thermal pad presence-before replacement, as thermal and stability behavior may differ.