Texas Instruments OPA2357AIDGST

Overview

OPA2357AIDGST from Texas Instruments is a dual-channel, rail-to-rail input/output, 250-MHz unity-gain stable CMOS operational amplifier in a 10-pin VSSOP package. It delivers 150 V/µs slew rate, 6.5 nV/√Hz input voltage noise, and >100 mA output current per channel, enabling high-fidelity video line driving and photodiode transimpedance amplification in space-constrained systems.

For engineers reviewing the OPA2357AIDGST datasheet, OPA2357AIDGST pinout, OPA2357AIDGST application, or OPA2357AIDGST equivalent, key selection criteria include its dual independent shutdown control (Enable A/B), –40°C to +125°C extended temperature operation, and verified 0.02% differential gain / 0.09° differential phase performance in NTSC video systems.

Technical Context

The OPA2357AIDGST employs complementary N- and P-channel input stages to achieve rail-to-rail common-mode input range extending 100 mV beyond supply rails, paired with a Class AB output stage delivering 100 mV rail-to-rail swing into 1-kΩ loads. Its voltage-feedback architecture supports stable unity-gain operation while maintaining 100-MHz gain-bandwidth product at G = +10.

Each channel features independent CMOS Schmitt-trigger Enable logic with 100 ns turn-on and 30 ns turn-off times, reducing quiescent current from 4.9 mA to 3.4 µA per amplifier when disabled. Channel-to-channel crosstalk is –100 dB at 5 MHz, ensuring isolation in dual-signal-path applications like RGB video buffering.

Key Specifications

Pinout & Package

The OPA2357AIDGST is housed in a 10-pin Very Thin Shrink Small Outline Package (VSSOP-10) measuring 3.00 mm × 3.00 mm, optimized for high-density PCB layouts and thermal performance (R_θJA = 171.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2355IDGSR and LMH6629MA/NOPB, the OPA2357AIDGST uniquely balances 250-MHz bandwidth, rail-to-rail I/O, dual independent shutdown, and VSSOP-10 compactness-making it optimal for space- and power-sensitive video, medical, and optical systems requiring precision analog signal integrity.

Availability

OPA2357AIDGST is available at Aetrix Electronics and suitable for video processing, photodiode transimpedance amplification, and laser diode driver applications requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for OPA2357AIDGST 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 and embedded processing technologies, with decades of expertise in high-performance op amps and precision signal chain solutions.

The OPA2357AIDGST belongs to TI's OPAx357 family of high-speed CMOS op amps, engineered specifically for video, ultrasound, optical networking, and other applications demanding wide bandwidth, low noise, and rail-to-rail operation on low-voltage supplies.

FAQ

What is the maximum operating supply voltage for the OPA2357AIDGST?

The OPA2357AIDGST has an absolute maximum supply voltage of 7.5 V (V+ to V−), but its recommended operating range is 2.5 V to 5.5 V. Operating above 5.5 V risks exceeding safe junction temperatures and may degrade long-term reliability. The device is fully specified and characterized from 2.7 V to 5.5 V, with electrical parameters guaranteed across this range at –40°C to +125°C.

Does the OPA2357AIDGST support true rail-to-rail input and output operation?

Yes, the OPA2357AIDGST supports true rail-to-rail input and output. Its input common-mode range extends 100 mV beyond both supply rails (V− – 0.1 V to V+ + 0.1 V), enabled by complementary N- and P-channel input stages. The output swings to within 100 mV of V+ and V− under 1-kΩ load, preserving dynamic range in single-supply 3.3-V or 5-V systems. This is confirmed in Section 6.5 of the SBOS235F datasheet.

How does the Enable function work on the OPA2357AIDGST, and what are its timing characteristics?

The OPA2357AIDGST features two independent CMOS Schmitt-trigger Enable inputs (Pins 5 and 6). A logic-high voltage ≥2.0 V enables the respective channel; a logic-low ≤0.8 V disables it, reducing quiescent current to 3.4 µA per channel. Turn-on time is 100 ns and turn-off time is 30 ns. When disabled, the output enters high-impedance state-enabling use in multiplexed bus architectures without external isolation switches.

Can the OPA2357AIDGST drive 75-Ω video cables directly, and what layout considerations apply?

Yes, the OPA2357AIDGST is explicitly characterized for 75-Ω back-terminated video cable driving (Figure 35, SBOS235F), delivering 0.02% differential gain and 0.09° differential phase error. For reliable operation, use a series 75-Ω resistor at the output pin, place a 0.1-µF ceramic capacitor between V+ and V− near the package, and route the output trace over solid ground plane to minimize parasitic inductance. Avoid stubs or vias in the 75-Ω path.

What is the thermal shutdown behavior of the OPA2357AIDGST, and how does it recover?

The OPA2357AIDGST incorporates an internal thermal shutdown circuit that activates at 160°C junction temperature, disabling both amplifiers to prevent permanent damage. Recovery occurs automatically when the junction cools to approximately 140°C. This hysteresis prevents oscillatory shutdown/restart cycles. Under sustained overload, thermal resistance (R_θJA = 171.3°C/W) means 100-mA output into 50-Ω load can raise die temperature by ~85°C above ambient-requiring adequate copper area or airflow in high-power designs.