Texas Instruments OPA4703UAG4

Overview

OPA4703UAG4 from Texas Instruments is a quad, rail-to-rail input/output CMOS operational amplifier optimized for unity-gain stability, 1 MHz gain-bandwidth product, 0.6 V/µs slew rate, and ultra-low quiescent current (160 µA per amplifier) across ±2 V to ±6 V dual supplies or 4 V to 12 V single supply. It operates from –40°C to +85°C and is used in portable data acquisition front-ends where low power and full dynamic range are critical.

For engineers reviewing the OPA4703UAG4 datasheet, OPA4703UAG4 pinout, OPA4703UAG4 application, or OPA4703UAG4 equivalent, key selection criteria include guaranteed rail-to-rail I/O swing (within 40 mV of rails at light load), 90 dB full-scale CMRR, 160 µV max input offset voltage, 1 pA input bias current, and SOIC-14 package compatibility with legacy board layouts.

Technical Context

The OPA4703UAG4 employs a complementary differential input stage enabling rail-to-rail common-mode input range extending 300 mV beyond both supply rails, with no phase inversion under overvoltage conditions when input current is limited to ≤10 mA. Its class-AB output stage delivers rail-to-rail output swing down to 40 mV from each rail into 100 kΩ loads.

Designed for unity-gain stability, it maintains 1 MHz GBW and 0.6 V/µs slew rate across its full specified supply (±2 V to ±6 V) and temperature (–40°C to +85°C) ranges. Input bias current remains ≤10 pA and PSRR exceeds 100 dB at DC, supporting precision sensor buffering in noisy industrial environments.

Key Specifications

Pinout & Package

OPA4703UAG4 is housed in a 14-pin SOIC (SO-14) surface-mount package with standard JEDEC MO-001AC footprint, 1.27 mm pitch, and 8.65 mm × 3.91 mm body size. Thermal resistance θ_JA is 100°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA4703EA, OPA4703UAG4 offers tube packaging for prototyping and lower minimum order quantities, while TLV2474IDR trades precision and stability for speed and cost-making OPA4703UAG4 optimal for low-power, high-accuracy unity-gain signal chains.

Availability

OPA4703UAG4 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin electronics, and medical wearables requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC-14 packaging.

Supply support for OPA4703UAG4 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 solutions, with decades of expertise in precision op amps and signal chain ICs.

The OPA703/OPA704 family-including OPA4703UAG4-is designed for ultra-low-power, rail-to-rail precision signal conditioning in battery-operated and space-constrained systems where dynamic range and supply flexibility are critical.

FAQ

What is the maximum operating temperature range for the OPA4703UAG4?

The OPA4703UAG4 is fully specified and guaranteed over an operating temperature range of –40°C to +85°C. Absolute maximum ratings extend to –55°C to +125°C, but electrical parameters such as input offset voltage, CMRR, and GBW are only assured within the –40°C to +85°C range per the SBOS180A datasheet. This makes OPA4703UAG4 suitable for under-hood automotive and industrial control applications.

Is the OPA4703UAG4 unity-gain stable?

Yes, the OPA4703UAG4 is explicitly designed and tested for unity-gain stability. It achieves 1 MHz gain-bandwidth and 0.6 V/µs slew rate in G = +1 configuration without requiring external compensation. The OPA4704 variant is optimized for gains ≥5 and is not unity-gain stable-so OPA4703UAG4 is the correct choice for voltage follower and buffer applications.

What is the input common-mode voltage range of the OPA4703UAG4?

The OPA4703UAG4 features rail-to-rail input with a common-mode voltage range extending from (V–) – 0.3 V to (V+) + 0.3 V at room temperature. This is enabled by a complementary N/P-channel input stage. Within the transition region (~500 mV wide near mid-supply), PSRR and CMRR may degrade slightly-but full 90 dB CMRR is maintained outside this zone per the datasheet's "CMRR Limited Range" curve.

Can the OPA4703UAG4 drive capacitive loads?

Yes, the OPA4703UAG4 can drive up to 1000 pF of pure capacitive load while maintaining stability. For unity-gain configurations with large capacitive loads (>100 pF), inserting a 10 Ω to 20 Ω series resistor inside the feedback loop (between output and inverting input) reduces ringing and improves step response without affecting DC accuracy-per Figure 5 in the SBOS180A datasheet.

What is the supply voltage range for the OPA4703UAG4?

The OPA4703UAG4 operates from a single supply of 4 V to 12 V or dual supplies of ±2 V to ±6 V. Its specified performance-including 1 MHz GBW, 160 µA quiescent current, and rail-to-rail I/O-is guaranteed across this full range. The absolute maximum supply is 13.2 V (V+ to V–), but operation outside the specified range voids parametric guarantees.