Texas Instruments OPA1692IDR

Overview

OPA1692IDR from Texas Instruments is a dual, low-noise, low-distortion audio operational amplifier optimized for microphone preamplification and portable audio signal conditioning. It delivers 4.2 nV/√Hz input voltage noise density, –127 dB THD+N at 1 kHz, and 650 µA per channel quiescent current across ±1.75 V to ±18 V supply range - enabling high-fidelity amplification in battery-powered wireless microphones and USB audio peripherals.

For engineers reviewing the OPA1692IDR datasheet, OPA1692IDR pinout, OPA1692IDR application, or OPA1692IDR equivalent, key selection criteria include rail-to-rail output swing within 200 mV of rails, 23 V/µs slew rate for transient fidelity, 5.1 MHz gain-bandwidth product for wideband stability, and distortion cancellation architecture that achieves >30 dB lower THD+N than comparable low-power op amps at 10 kHz.

Technical Context

The OPA1692IDR employs a folded-cascode input stage with proprietary distortion cancellation targeting odd-order harmonics generated by the input transistor pair. This architecture enables –127 dB THD+N at 1 kHz and –114 dB CCIF IMD at 19/20 kHz without increasing quiescent current beyond 650 µA per channel.

It integrates phase-reversal protection to prevent output inversion when inputs exceed common-mode range (–40°C to +125°C), and features ESD-rated inputs (±3 kV HBM, ±1 kV CDM) with internal steering diodes and clamping absorption devices - ensuring robustness in handheld and field-deployable audio systems.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, thin-profile surface-mount. Compatible with SOIC-8 footprints via adapter but not pin-compatible due to different pad layout and thermal pad absence.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar audio operational amplifier applications.

Compared with OPA1692IDR, OPA1678IDR trades 30% lower noise for 145% higher quiescent current and loss of distortion cancellation, while LM4562MAX offers superior open-loop gain but lacks rail-to-rail output and consumes >5× more power - making OPA1692IDR uniquely balanced for portable, low-noise, low-distortion audio front-ends.

Availability

OPA1692IDR is available at Aetrix Electronics and suitable for wireless microphones, USB audio peripherals, and portable recording systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.

Supply support for OPA1692IDR 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 audio signal chain solutions.

The OPA1692IDR belongs to TI's SoundPlus™ audio op amp family, engineered specifically for ultra-low-noise, low-distortion, low-power amplification in portable and wireless audio systems - balancing fidelity, efficiency, and robustness.

FAQ

What is the maximum operating temperature range for the OPA1692IDR?

The OPA1692IDR is specified for continuous operation from –40°C to +125°C ambient temperature. Its electrical characteristics - including input offset voltage drift (0.5 µV/°C), THD+N, and quiescent current (up to 975 µA per channel at 125°C) - are guaranteed across this full industrial temperature range, making it suitable for automotive cabin audio modules and outdoor wireless microphone transmitters.

Does the OPA1692IDR support single-supply operation?

Yes, the OPA1692IDR supports true single-supply operation from 3.5 V to 36 V. Its rail-to-rail output stage swings within 200 mV of both supply rails under 2-kΩ load, and its input common-mode range extends from (V–)+1.5 V to (V+)–0.5 V - enabling direct coupling in 3.3-V or 5-V systems without level-shifting circuitry. The OPA1692IDR datasheet confirms operation down to 3.5 V with full specification compliance.

How does the distortion cancellation technology in the OPA1692IDR differ from standard feedback-based distortion reduction?

The OPA1692IDR uses a proprietary internal distortion cancellation technique that targets odd-order harmonics at the input transistor pair level - reducing THD+N without increasing loop gain or quiescent current. Unlike conventional feedback methods that demand higher supply current to improve open-loop gain, the OPA1692IDR achieves –127 dB THD+N at 1 kHz while drawing only 650 µA per channel, enabling high-fidelity audio in power-constrained designs where alternatives like OPA1678IDR consume 1.6 mA/ch for marginally better noise.

Can the OPA1692IDR drive capacitive loads without instability?

Yes, the OPA1692IDR is unity-gain stable and can safely drive up to 200 pF capacitive loads with appropriate isolation resistance (e.g., 25 Ω series resistor). Figure 15 in the OPA1692IDR datasheet shows ≥60° phase margin at 100 pF with RISO = 25 Ω, and Figure 16 confirms <5% overshoot under the same conditions. For loads >200 pF, external compensation or buffer isolation is recommended to maintain stability.

Is the OPA1692IDR pin-compatible with other TI dual op amps in VSSOP-8 packages?

No, the OPA1692IDR is not pin-compatible with generic VSSOP-8 op amps such as TLV2462 or OPA2350. Its pinout (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+) follows TI's dual-amplifier standard but differs from industry-common configurations - e.g., +IN B and –IN B are swapped relative to many competitors. PCB layout must follow the OPA1692IDR-specific pin mapping shown in Section 5 of the SBOS566C datasheet.