Texas Instruments OPA2316IDR

Overview

OPA2316IDR from Texas Instruments is a dual, rail-to-rail input/output, low-noise CMOS operational amplifier optimized for 1.8-V to 5.5-V single-supply operation. It delivers 10-MHz unity-gain bandwidth, 400-µA per channel quiescent current, 11-nV/√Hz input voltage noise at 1 kHz, ±0.5-mV offset voltage, and ±5-pA input bias current - enabling precision signal conditioning in space-constrained, battery-powered systems.

For engineers reviewing the OPA2316IDR datasheet, OPA2316IDR pinout, OPA2316IDR application, or OPA2316IDR equivalent, this page provides verified specifications, package mapping (SOIC-8), functional pin definitions, real-world application context, and validated alternative options for low-voltage, low-power analog signal chains.

Technical Context

The OPA2316IDR implements a fully differential CMOS input stage with rail-to-rail common-mode input range extending 0.2 V beyond both supply rails and rail-to-rail output swing within 15 mV of each rail under 10-kΩ load. Its 10-MHz gain-bandwidth product and 6-V/µs slew rate support stable unity-gain operation with no external compensation required.

Internal RFI-EMI filtering suppresses high-frequency interference without degrading small-signal bandwidth, while robust overdrive recovery (0.3 µs) and absence of phase reversal ensure reliable performance in sensor front-ends and multiplexed signal paths operating across –40°C to +125°C.

Key Specifications

Pinout & Package

OPA2316IDR is housed in an 8-pin SOIC package (body size 3.91 mm × 4.90 mm) with exposed thermal pad connected internally to V–. Pin 1 is marked by a beveled corner or dot; the device uses standard SOIC lead pitch (1.27 mm) and conforms to JEDEC MS-012.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-power operational amplifier applications.

Compared with OPA2316IDR, OPA2313IDR trades bandwidth and EMI resilience for lower cost and marginally lower power, while MCP6022-I/SN offers higher drive capability at the expense of 2.5× higher quiescent current - making OPA2316IDR optimal for battery-critical, noise-sensitive, and RF-hostile environments.

Availability

OPA2316IDR is available at Aetrix Electronics and suitable for battery-powered medical devices, automotive cabin sensors, barcode scanner front-ends, and industrial PLC analog input modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA2316IDR 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 precision amplifiers and low-power signal chain solutions.

The OPAx316 family was designed specifically for cost-sensitive, space-constrained applications demanding high AC performance (10-MHz GBW), ultra-low power (400 µA/ch), and robust operation down to 1.8 V - targeting portable instrumentation, automotive sensing, and industrial IoT endpoints.

FAQ

What is the maximum operating temperature for the OPA2316IDR?

The OPA2316IDR is specified to operate continuously from –40°C to +125°C ambient temperature, with absolute maximum junction temperature rated at 150°C. This makes it suitable for under-hood automotive applications and industrial environments where thermal stress is a key design constraint. The SOIC-8 package's thermal metrics (RθJA = 127.2°C/W) enable reliable operation at full specification within this range when PCB copper area is properly allocated for heat dissipation.

Does the OPA2316IDR support true single-supply operation with rail-to-rail input?

Yes, the OPA2316IDR supports true single-supply operation with rail-to-rail input common-mode range extending to (V–) – 0.2 V and (V+) + 0.2 V at supplies ≥2.5 V. At 1.8-V supply, the input range is (V–) – 0.2 V to (V+), enabling direct interfacing with unbuffered sensors and resistive dividers without external level-shifting circuitry - a key enabler for low-component-count portable designs.

What is the typical quiescent current per channel for the OPA2316IDR at 5 V supply?

The typical quiescent current per channel for the OPA2316IDR is 400 µA at 5 V supply and 25°C, with a maximum of 500 µA across the full –40°C to +125°C temperature range. This value remains stable across the entire 1.8–5.5-V supply range, allowing predictable power budgeting in battery-operated systems regardless of cell voltage decay.

Is the OPA2316IDR unity-gain stable, and what is its phase margin?

Yes, the OPA2316IDR is unity-gain stable with a guaranteed phase margin of ≥60° at G = +1 and 5 V supply. This stability is achieved without external compensation and is maintained across all recommended supply voltages (1.8–5.5 V) and temperatures (–40°C to +125°C), simplifying design of high-fidelity audio, sensor, and active filter circuits.

How does the integrated RFI-EMI filter in the OPA2316IDR improve system-level robustness?

The integrated RFI-EMI filter in the OPA2316IDR attenuates high-frequency interference (e.g., GSM, Wi-Fi, Bluetooth bands) before it reaches the input stage, reducing susceptibility to rectified noise that causes DC offset shifts or spurious outputs. Unlike discrete RC filters, this on-die solution preserves small-signal bandwidth and avoids parasitic resonance - critical for maintaining accuracy in portable medical monitors and wireless sensor nodes where RF exposure is unavoidable.