Texas Instruments OPA2350UAG4

Overview

OPA2350UAG4 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 OPA2350UAG4 datasheet, OPA2350UAG4 pinout, OPA2350UAG4 application, or OPA2350UAG4 equivalent, key selection criteria include its rail-to-rail swing within 10 mV of supply rails at 10-kΩ load, −40°C to +85°C specified temperature range, THD+N of 0.0006% at 1 kHz, and compatibility with 2.7–5.5 V single supplies.

Technical Context

The OPA2350UAG4 employs a complementary CMOS input stage-N-channel and P-channel differential pairs-to achieve rail-to-rail input common-mode range extending 100 mV beyond both supply rails. Its class AB output stage enables rail-to-rail output swing while maintaining >100 dB open-loop gain up to 10 kHz.

It is unity-gain stable and features laser-trimmed offset voltage (±150 µV typ) to minimize transition-region distortion between input stages. The device drives capacitive loads up to 100 pF in unity-gain configuration without external compensation, supporting fast settling (0.22 µs to 0.1%) in precision sampling systems.

Key Specifications

Pinout & Package

OPA2350UAG4 is housed in an SOIC-8 (D) package measuring 3.91 mm × 4.90 mm, with exposed pad not present and RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2322UA and AD8642ARZ, the OPA2350UAG4 uniquely balances 38 MHz bandwidth, 22 V/µs slew rate, and true rail-to-rail I/O in a dual SOIC-8 package-making it irreplaceable in video line drivers and fast ADC buffer designs where output swing and settling performance are non-negotiable.

Availability

OPA2350UAG4 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 across automotive, industrial, and consumer electronics programs.

Supply support for OPA2350UAG4 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, with over 50 years of innovation in precision amplifiers and signal chain ICs.

The OPA2350UAG4 belongs to TI's MicroAmplifier™ series, designed specifically for low-voltage, high-speed signal conditioning in portable and space-constrained systems where rail-to-rail operation and low noise are essential.

FAQ

What is the maximum operating temperature range for the OPA2350UAG4?

The OPA2350UAG4 is specified from −40°C to +85°C for commercial operation, and functions reliably across −55°C to +150°C. Its thermal resistance (R_θJA) is 140.1°C/W in SOIC-8 package, requiring attention to PCB copper area and airflow in high-temperature environments to maintain junction temperature below 150°C. The OPA2350UAG4 maintains rail-to-rail performance across this full range.

Does the OPA2350UAG4 support single-supply operation below 3.0 V?

Yes, the OPA2350UAG4 operates from a minimum supply voltage of 2.7 V and is fully specified down to that level. While absolute maximum rating allows 2.5 V, TI guarantees all electrical characteristics-including 38 MHz GBW, 22 V/µs slew rate, and rail-to-rail swing-only from 2.7 V to 5.5 V. At 2.7 V, output swing remains within 15 mV of rails with 10-kΩ load, and THD+N stays ≤0.001%.

Can the OPA2350UAG4 drive a 600-Ω load without oscillation?

Yes, the OPA2350UAG4 is characterized to drive 600-Ω loads stably with THD+N of 0.0006% at 1 kHz and differential gain/phase errors of 0.17%/0.17°, meeting broadcast video standards. Its class AB output stage delivers ±40 mA output current, and stability is maintained without external compensation due to internal compensation optimized for unity-gain and moderate closed-loop gains.

What is the input common-mode voltage range of the OPA2350UAG4?

The OPA2350UAG4 features rail-to-rail input with a common-mode range from (V−) −0.1 V to (V+) +0.1 V, verified across −40°C to +85°C. This is achieved via complementary N- and P-channel input pairs. Within the 400-mV transition region near (V+) −1.8 V, PSRR and THD may degrade slightly-but the OPA2350UAG4 remains functional and usable with appropriate system-level filtering.

How does the OPA2350UAG4 handle capacitive loads in unity-gain configuration?

The OPA2350UAG4 is internally compensated for unity-gain stability and supports capacitive loads up to 100 pF without external isolation resistor. Its low-frequency output impedance (<0.001 Ω in unity-gain) and rising capacitive reactance at high frequencies prevent peaking or ringing. For loads >100 pF, a small series resistor (10–50 Ω) at the output restores phase margin while preserving DC accuracy.