Texas Instruments OPA2350PA

Overview

OPA2350PA 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 analog front-ends-particularly for driving medium-speed sampling ADCs with 75-Ω video drive capability.

For engineers reviewing the OPA2350PA datasheet, OPA2350PA pinout, OPA2350PA application, or OPA2350PA equivalent, this page provides verified specifications, package mapping to SOIC-8, confirmed dual-channel rail-to-rail performance, thermal metrics (RθJA = 140.1°C/W), and two validated alternative op-amps for A/D driver, audio, and video signal-path designs.

Technical Context

The OPA2350PA employs a complementary CMOS input stage-N-channel and P-channel differential pairs-with laser trimming to minimize offset discontinuity across the 400-mV transition region near V+. Its class AB output stage achieves rail-to-rail swing within 10 mV of supply rails under 10-kΩ load, maintaining >100 dB open-loop gain.

It operates from 2.7 V to 5.5 V single supply, supports input common-mode range extending 100 mV beyond rails, and remains unity-gain stable while driving ≥100 pF capacitive loads. THD+N is specified at 0.0006% (1 kHz, RL = 600 Ω, VO = 2.5 VPP, G = 1), with channel separation >120 dB at 10 kHz.

Key Specifications

Pinout & Package

OPA2350PA is packaged in an 8-pin SOIC (D package) with 3.91 mm × 4.90 mm body size and standard JEDEC MS-012AC footprint. Thermal resistance is RθJA = 140.1°C/W (SOIC-8).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2350PA, OPA2322AIDR trades lower noise for higher power consumption and reduced battery life, while AD8662ARZ sacrifices slew rate and transient response for superior harmonic purity-making OPA2350PA the balanced choice for mixed-signal timing-critical applications like ADC driving and video buffering.

Availability

OPA2350PA is available at Aetrix Electronics and suitable for cell phone PA control loops, video processing systems, and high-speed data acquisition requiring stable component supply across automotive, industrial, and consumer electronics programs.

Supply support for OPA2350PA 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.

The OPA2350PA belongs to TI's MicroAmplifier™ series, designed specifically for low-voltage, rail-to-rail signal conditioning in portable, video, and high-speed data acquisition systems where dynamic range, speed, and small footprint are essential.

FAQ

What is the maximum operating temperature range for the OPA2350PA?

The OPA2350PA is fully specified from −40°C to +85°C for commercial and industrial use, and operates reliably from −55°C to +150°C. This extended range supports deployment in under-hood automotive modules and industrial motor control enclosures where ambient temperatures exceed standard limits. The OPA2350PA maintains its 38 MHz GBW and 22 V/µs slew rate across the full −40°C to +85°C range per TI SBOS099D datasheet Section 6.3.

Does the OPA2350PA require external compensation for unity-gain stability?

No, the OPA2350PA is internally compensated and unity-gain stable without external components. Its design allows direct use in gain-of-1 buffer configurations-such as ADC input drivers-without risk of oscillation. TI confirms stability with ≥100 pF capacitive loads in unity-gain, as validated in Figure 21 of SBOS099D. Adding series resistance at the output may further improve phase margin when driving heavy capacitive loads.

Can the OPA2350PA drive a 75-Ω video load with full NTSC compliance?

Yes, the OPA2350PA meets NTSC video specifications with differential gain error of 0.17% and differential phase error of 0.17° at 1.4 VPP output into 75 Ω (G = 2, f = 3.58 MHz). TI's reference design in SBOS099D Figure 7 confirms this performance using standard NTSC signal generators. The device's rail-to-rail output and 22 V/µs slew rate ensure clean sync pulse edges and minimal chroma delay.

What is the input common-mode voltage range of the OPA2350PA?

The OPA2350PA supports an input common-mode voltage range from −0.1 V to (V+) + 0.1 V, extending 100 mV beyond both supply rails. This rail-to-rail input capability enables direct connection to sensors, DACs, and other sources operating at ground or near-V+ without level-shifting circuitry. Performance parameters-including CMRR and PSRR-are maintained across this full range except within the 400-mV transition region near V+ where laser trimming minimizes discontinuity.

How does the OPA2350PA handle capacitive loads in high-gain configurations?

In high-gain configurations (G ≥ 10), the OPA2350PA exhibits improved capacitive load drive capability compared to unity-gain due to increased phase margin. TI's SBOS099D Figure 21 shows stable operation with >1 nF load at G = 10, versus ~100 pF at G = 1. For G = 1, adding a 10-Ω series resistor between output and load reduces peaking; the device's low output impedance (<1 mΩ at DC in closed-loop) ensures minimal gain error even with 600-Ω video termination.