Texas Instruments OPA4703EA/250

Overview

OPA4703EA/250 from Texas Instruments is a quad-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, medium-speed signal conditioning in single- or dual-supply systems. It delivers 1 MHz gain-bandwidth, 0.6 V/µs slew rate, 160 µA quiescent current per amplifier, 90 dB full-scale CMRR, and 160 µV max input offset voltage - enabling precision sensor buffering and active filtering in automotive and portable equipment.

For engineers reviewing the OPA4703EA/250 datasheet, OPA4703EA/250 pinout, OPA4703EA/250 application, or OPA4703EA/250 equivalent, this page provides verified package mapping (TSSOP-14), confirmed rail-to-rail I/O behavior, validated thermal performance (θ_JA = 100°C/W), and real-world design guidance for unity-gain stability and capacitive load drive up to 1000 pF.

Technical Context

The OPA4703EA/250 belongs to the OPA703 family, featuring a complementary N/P-channel input stage enabling rail-to-rail common-mode input range extending 300 mV beyond supply rails, and a class-AB output stage delivering rail-to-rail swing within 40 mV of V+ or V– under light loads. Its unity-gain stability and 1 MHz GBW are specified across ±2 V to ±6 V dual supplies (or 4 V to 12 V single supply).

Each of its four amplifiers operates independently with matched DC and AC performance: input bias current ≤1 pA, input voltage noise density 45 nV/√Hz at 1 kHz, open-loop gain ≥100 dB (RL = 20 kΩ), and output drive capability of ±10 mA into resistive loads - all guaranteed over –40°C to +85°C.

Key Specifications

Pinout & Package

TSSOP-14 surface-mount package (PW), 5.0 mm × 4.4 mm footprint, 0.65 mm pitch, moisture sensitivity level 2 (260°C peak reflow).

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/250, OPA4703UA offers identical performance in a larger SOIC package for easier handling and thermal mass, while TLV2474IDR trades 160 µV offset and 160 µA IQ for higher speed and wider temperature range - making OPA4703EA/250 optimal for precision, low-power, space-constrained designs.

Availability

OPA4703EA/250 is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable instrumentation front-ends, and multi-channel data acquisition systems requiring stable component supply, guaranteed RoHS compliance, and traceable lot-level documentation.

Supply support for OPA4703EA/250 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 over 90 years of innovation in precision amplifiers and signal chain solutions.

The OPA703 family - including OPA4703EA/250 - was designed specifically for low-power, rail-to-rail precision signal conditioning in space- and energy-constrained applications such as automotive sensors and portable test equipment.

FAQ

What is the maximum capacitive load the OPA4703EA/250 can drive without instability?

The OPA4703EA/250 is characterized to drive up to 1000 pF of pure capacitive load while maintaining stability in unity-gain configuration. This capability eliminates the need for isolation resistors when interfacing with SAR or sigma-delta ADCs, preserving signal fidelity and reducing component count. Performance is verified per TI SBOS180A datasheet Figure 17 and Application Information section on capacitive load drive.

Does the OPA4703EA/250 support single-supply operation below 4 V?

No - the OPA4703EA/250 is specified and guaranteed for single-supply operation from 4 V to 12 V only. Operation below 4 V falls outside the absolute maximum ratings and may result in degraded parameters including reduced open-loop gain, increased input offset voltage drift, and loss of rail-to-rail output swing. The minimum operating voltage is explicitly defined in the Electrical Characteristics table on page 3 of SBOS180A.

Is the OPA4703EA/250 pin-compatible with the OPA4704EA/250?

No - although both use the TSSOP-14 package and share identical pinout, the OPA4703EA/250 and OPA4704EA/250 are not functionally interchangeable. The OPA4704EA/250 is optimized for gains ≥5 (3 MHz GBW, 3 V/µs SR) and is not unity-gain stable, whereas the OPA4703EA/250 is unity-gain stable with 1 MHz GBW and 0.6 V/µs SR. Substituting one for the other risks oscillation or inadequate bandwidth.

What is the thermal resistance (θ_JA) of the OPA4703EA/250 in its TSSOP-14 package?

The junction-to-ambient thermal resistance (θ_JA) of the OPA4703EA/250 in TSSOP-14 package is 100°C/W, as specified in the Thermal Resistance table on page 4 of the SBOS180A datasheet. This value assumes standard JEDEC 2-layer board conditions (2 oz copper, 1 in² pad). Actual thermal performance improves with enhanced PCB copper pour or thermal vias beneath the exposed pad (if present - note: standard TSSOP-14 PW has no exposed pad).

Can the OPA4703EA/250 operate with input voltages exceeding the supply rails?

Yes - the OPA4703EA/250 input common-mode range extends 300 mV beyond the supply rails (V– – 0.3 V to V+ + 0.3 V), and its ESD diodes tolerate momentary overvoltage if input current is limited to ≤10 mA. This allows safe interface with signals from higher-voltage domains (e.g., 12 V sensors into 5 V system) when series current-limiting resistors are used, as shown in Figure 3 of SBOS180A.