Texas Instruments OPA2350EA/2K5G4

Overview

OPA2350EA/2K5G4 from Texas Instruments is a dual rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation. It delivers 38 MHz gain-bandwidth, 22 V/µs slew rate, and 5 nV/√Hz input voltage noise, enabling high-fidelity signal conditioning in space-constrained A/D converter driver and video processing circuits with 75-Ω load capability.

For engineers reviewing the OPA2350EA/2K5G4 datasheet, OPA2350EA/2K5G4 pinout, OPA2350EA/2K5G4 application, or OPA2350EA/2K5G4 equivalent, key selection criteria include rail-to-rail swing within 10 mV of rails at 10-kΩ load, THD+N of 0.0006% at 1 kHz, and guaranteed operation from 2.7 V to 5.5 V over −40°C to 85°C.

Technical Context

The OPA2350EA/2K5G4 employs a complementary N/P-channel input stage enabling rail-to-rail common-mode input range extending 100 mV beyond supply rails, with a 400-mV transition region where both pairs are active. Its class AB output stage achieves rail-to-rail output swing while maintaining >100 dB open-loop gain at 10-kΩ load.

Designed for unity-gain stability, it drives capacitive loads up to 100 pF in G = 1 configuration without external compensation. The device features laser-trimmed offset voltage (±500 µV typ) and low input bias current (±0.5 pA typ), supporting precision DC-coupled signal paths in battery-powered instrumentation.

Key Specifications

Pinout & Package

OPA2350EA/2K5G4 is packaged in an 8-pin SOIC (D package) with 3.91 mm × 4.90 mm body size, rated for −40°C to 85°C operation and compatible with standard surface-mount reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2350EA/2K5G4, OPA2322AIDR trades bandwidth for lower noise in precision DC applications, while AD8642ARZ offers broader supply flexibility at reduced speed-neither matches the OPA2350's combination of 38 MHz, 22 V/µs, and 0.0006% THD+N in a dual SOIC package.

Availability

OPA2350EA/2K5G4 is available at Aetrix Electronics and suitable for cell phone PA control loops, A/D converter driving, and video processing applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for OPA2350EA/2K5G4 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 personal electronics markets.

The OPA2350EA/2K5G4 belongs to TI's MicroAmplifier Series, designed specifically for high-speed, low-voltage, rail-to-rail signal conditioning in portable and space-constrained systems.

FAQ

What is the maximum operating temperature range for the OPA2350EA/2K5G4?

The OPA2350EA/2K5G4 is specified from −40°C to 85°C for reliable operation, with extended functionality up to 150°C. Its thermal resistance (RθJA = 140.1°C/W in SOIC-8) allows sustained performance in compact enclosures when proper PCB copper pour and airflow are implemented. Always verify junction temperature under worst-case load conditions using the OPA2350EA/2K5G4's 5.2 mA per amplifier quiescent current and output power dissipation.

Does the OPA2350EA/2K5G4 support true rail-to-rail input with signals below ground?

Yes, the OPA2350EA/2K5G4 supports rail-to-rail input down to −0.1 V relative to V−, enabling direct interfacing with signals that swing slightly below ground in single-supply systems. This is achieved via its complementary N/P-channel input stage. However, operation within the 400-mV transition region near (V+) − 1.8 V may degrade PSRR and THD; for optimal precision, keep input common-mode voltage outside this zone. The OPA2350EA/2K5G4 datasheet confirms this behavior in Section 7.3.2.

Can the OPA2350EA/2K5G4 drive a 600-Ω load at 2.5 VPP without distortion?

Yes, the OPA2350EA/2K5G4 is characterized for THD+N of 0.0006% at 1 kHz with RL = 600 Ω and VO = 2.5 VPP, confirming low-distortion operation into 600-Ω loads. Its class AB output stage delivers ±40 mA, sufficient to sustain 2.5 VPP across 600 Ω (±2.08 mA peak). For video applications, differential gain/phase errors remain at 0.17%/0.17° under identical conditions-validating broadcast-compliant performance. Always use local 0.01-μF ceramic bypass capacitors on V+ and V− pins.

Is the OPA2350EA/2K5G4 unity-gain stable and does it require external compensation?

Yes, the OPA2350EA/2K5G4 is unity-gain stable and requires no external compensation components. Its internal compensation ensures ≥45° phase margin in G = 1 configurations, even with 100-pF capacitive loads. This is verified in Figure 21 of the SBOS099D datasheet. Stability is maintained across the full 2.7–5.5 V supply range and −40°C to 85°C temperature range, making the OPA2350EA/2K5G4 ideal for simple buffer and gain-of-1 applications without added complexity.

How does the OPA2350EA/2K5G4 handle input overvoltage conditions beyond the supply rails?

The OPA2350EA/2K5G4 input terminals are diode-clamped to the supply rails, allowing momentary overvoltage up to 0.3 V beyond V+ or V− if input current is limited to ≤10 mA. Exceeding this risks latch-up or permanent damage. For robust protection, TI recommends series resistors (e.g., 1 kΩ) on inputs exposed to transient overvoltage. The OPA2350EA/2K5G4's absolute maximum rating specifies (V−) −0.3 V and (V+) + 0.3 V for signal inputs-designs must respect this limit during fault conditions.