Texas Instruments OPA1692ID

Overview

OPA1692ID from Texas Instruments is a dual, low-noise, low-distortion audio operational amplifier optimized for high-fidelity microphone preamplification and portable audio signal conditioning. It delivers 4.2 nV/√Hz input voltage noise at 1 kHz, –127 dB THD+N at 1 kHz (3 VRMS), and 23 V/µs slew rate while consuming only 650 µA per channel - enabling battery-powered wireless microphones and USB audio peripherals with extended runtime and studio-grade linearity.

For engineers reviewing the OPA1692ID datasheet, OPA1692ID pinout, OPA1692ID application, or OPA1692ID equivalent, this page provides verified circuit role, rail-to-rail output swing within 200 mV of rails, unity-gain stability, ±1.75 V to ±18 V supply flexibility, and distortion cancellation architecture validated for electret microphone biasing and low-THD analog front-ends.

Technical Context

The OPA1692ID integrates a folded-cascode low-noise input stage with proprietary distortion cancellation that suppresses odd-order harmonics without increasing quiescent current. Its rail-to-rail output stage delivers ±50 mA drive into 2-kΩ loads while maintaining <200 mV headroom from supply rails across –40°C to +125°C.

It features internal phase-reversal protection that clamps output instead of inverting polarity when inputs exceed common-mode range, and includes ESD protection rated to ±3000 V HBM and ±1000 V CDM - critical for handheld audio interfaces exposed to user handling and cable coupling transients.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm lead pitch, thermally enhanced exposed pad for improved power dissipation in space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA1612ID and LM4562MAX, the OPA1692ID uniquely balances ultra-low distortion (–127 dB), low noise (4.2 nV/√Hz), and ultra-low quiescent current (650 µA/ch) - making it the only dual op-amp qualified for battery-operated, high-SNR audio front-ends requiring both precision and endurance.

Availability

OPA1692ID is available at Aetrix Electronics and suitable for wireless microphones, portable recording systems, and USB audio peripherals requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for OPA1692ID 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 leadership in precision op-amps and audio signal chain solutions.

The OPA1692ID belongs to TI's SoundPlus™ audio op-amp family, engineered specifically for low-power, low-distortion signal conditioning in portable and wireless audio systems - prioritizing THD+N, noise, and supply efficiency over raw speed or output current.

FAQ

What is the maximum capacitive load the OPA1692ID can drive without instability?

The OPA1692ID is specified to drive up to 200 pF capacitive load while maintaining ≥60° phase margin in unity-gain configuration. For loads exceeding 200 pF, a series isolation resistor (RISO ≥ 25 Ω) is recommended to preserve stability - verified in Figure 15 and Figure 16 of the OPA1692ID datasheet. This capability supports direct connection to ADC input capacitors and long PCB traces in compact audio modules.

Does the OPA1692ID support single-supply operation?

Yes, the OPA1692ID 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, and its input common-mode range extends from (V–) + 1.5 V to (V+) – 0.5 V - enabling robust performance in 3.3 V or 5 V systems with proper input biasing. The OPA1692ID datasheet specifies all key parameters under both single- and split-supply conditions.

How does the OPA1692ID's distortion cancellation technology differ from conventional feedback-based distortion reduction?

The OPA1692ID uses a proprietary internal distortion cancellation technique that targets odd-order harmonics generated by the input transistor pair - reducing THD+N without increasing quiescent current. Unlike conventional methods that rely solely on higher loop gain (and thus higher IQ), this architecture achieves –127 dB THD+N at 1 kHz while drawing only 650 µA per channel - a performance unattainable with standard low-power op-amps.

What is the thermal performance of the OPA1692ID in VSSOP-8 (DGK) package?

In the VSSOP-8 (DGK) package, the OPA1692ID has a junction-to-ambient thermal resistance (RθJA) of 162.2°C/W and junction-to-board (RθJB) of 83.2°C/W. With its 650 µA per channel IQ, self-heating remains minimal - typically <1°C rise above ambient at room temperature - making it suitable for sealed enclosures and stacked PCBs in compact audio devices.

Is the OPA1692ID pin-compatible with other dual op-amps in VSSOP-8 package?

No, the OPA1692ID is not pin-compatible with generic dual op-amps such as TL072 or NE5532 in VSSOP-8. Its pinout (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+) follows TI's standard dual-amplifier layout but differs from industry-common variants. Always verify pin mapping against the OPA1692ID datasheet Figure 3 before PCB layout - especially the placement of V– and V+ pins relative to input/output terminals.