Texas Instruments OPA1692IDGKR

Overview

OPA1692IDGKR from Texas Instruments is a dual, low-noise, low-distortion audio operational amplifier in an 8-pin VSSOP package. It delivers 4.2 nV/√Hz input voltage noise, –127 dB THD+N at 1 kHz, and 23 V/µs slew rate while consuming only 650 µA per channel. Designed for microphone preamplification and portable audio signal chains, it supports rail-to-rail output swing within 200 mV of rails into 2-kΩ loads.

For engineers reviewing the OPA1692IDGKR datasheet, OPA1692IDGKR pinout, OPA1692IDGKR application, or OPA1692IDGKR equivalent, key selection criteria include its ultra-low distortion at low quiescent current, wide ±1.75 V to ±18 V supply range, unity-gain stability, and phase-reversal protection-critical for electret microphone biasing and battery-powered audio front-ends.

Technical Context

The OPA1692IDGKR employs a folded-cascode input stage with proprietary distortion cancellation technology that suppresses odd-order harmonics without increasing supply current. Its rail-to-rail output stage delivers ±50 mA drive capability and maintains linearity across temperature (–40°C to +125°C) and supply variations.

It features internal phase-reversal protection to prevent output inversion during common-mode overdrive, and integrated ESD protection (±3000 V HBM, ±1000 V CDM) with steering diodes and clamping absorption devices. The device is unity-gain stable and optimized for capacitive loads up to 200 pF.

Key Specifications

Pinout & Package

OPA1692IDGKR is housed in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm, optimized for space-constrained portable audio PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA1692IDGKR, OPA1612AIDR trades 6× higher quiescent current for 3.8× lower input noise, while LM4562MAX/NOPB offers superior open-loop gain but lacks rail-to-rail output and phase-reversal immunity-making OPA1692IDGKR uniquely balanced for portable, low-power, high-fidelity audio.

Availability

OPA1692IDGKR 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 OPA1692IDGKR 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 amplifiers and audio signal chain solutions.

The OPA1692IDGKR belongs to TI's SoundPlus™ audio op-amp family, engineered specifically for ultra-low-noise, low-distortion, and low-power performance in portable and battery-operated audio applications.

FAQ

What is the maximum capacitive load the OPA1692IDGKR can drive stably?

The OPA1692IDGKR is characterized for stable operation with capacitive loads up to 200 pF without external isolation resistors. Figure 15 in the datasheet shows phase margin remains >60° at 200 pF with G = 1. For loads exceeding 200 pF, a series resistor (e.g., 25 Ω) between output and load restores stability-verified in TI's application note SBAA322. This capability simplifies filter design in OPA1692IDGKR-based anti-aliasing stages.

Does the OPA1692IDGKR support single-supply operation?

Yes, the OPA1692IDGKR operates from a single supply of 3.5 V to 36 V, enabling direct use in 5 V USB audio devices or 9 V portable recorders. Its rail-to-rail output swings within 200 mV of both rails into 2-kΩ, and input common-mode range extends to (V–) + 1.5 V and (V+) – 0.5 V-allowing full-swing signal handling with proper input biasing. This makes OPA1692IDGKR ideal for single-supply electret microphone preamps.

How does the OPA1692IDGKR's distortion cancellation technology differ from conventional feedback methods?

Unlike traditional distortion reduction that increases quiescent current to boost loop gain, the OPA1692IDGKR uses proprietary on-die circuitry to cancel odd-order harmonics generated by the input transistor pair-without raising IQ. This enables –127 dB THD+N at 650 µA, whereas competing amps require >2 mA to achieve comparable distortion. The technique is intrinsic to the OPA1692IDGKR silicon and requires no external components or layout changes.

What is the thermal performance of the OPA1692IDGKR in VSSOP (DGK) package?

In the 8-pin VSSOP (DGK) package, the OPA1692IDGKR has a junction-to-ambient thermal resistance (RθJA) of 162.2°C/W. At 650 µA per channel (1.3 mA total), power dissipation is ~23.4 mW (18 V × 1.3 mA), resulting in <4°C junction rise above ambient under still-air conditions. This confirms suitability for sealed enclosures in wireless microphones and headsets where airflow is limited-no heatsink required for OPA1692IDGKR in typical audio gain configurations.

Is the OPA1692IDGKR pin-compatible with other dual op-amps in VSSOP-8?

No, the OPA1692IDGKR has a unique pinout optimized for dual-channel symmetry: pins 1/7 are outputs, 2/6 are inverting inputs, 3/5 are noninverting inputs, and 4/8 are supplies. It is not pin-compatible with generic dual op-amps like TL072 or NE5532 in VSSOP-8. Layout must follow TI's recommended footprint for DGK package (3.00 mm × 3.00 mm body, 0.65 mm pitch); substituting OPA1692IDGKR requires PCB revision unless using TI's pin-compatible OPA1691 (single) or OPA1694 (quad) variants.