Texas Instruments OPA1692IDGKT

Overview

OPA1692IDGKT from Texas Instruments is a dual, low-noise, low-distortion, rail-to-rail output 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. It operates from ±1.75 V to ±18 V supplies and drives ±50 mA into 2-kΩ loads - ideal for battery-powered microphone preamplifiers and portable audio interfaces.

For engineers reviewing the OPA1692IDGKT datasheet, OPA1692IDGKT pinout, OPA1692IDGKT application, or OPA1692IDGKT equivalent, key selection criteria include its ultra-low distortion at low quiescent current, rail-to-rail output swing within 200 mV of rails, phase-reversal protection, and guaranteed performance from –40°C to +125°C across supply voltages up to ±18 V.

Technical Context

The OPA1692IDGKT employs a folded-cascode input stage with proprietary distortion cancellation that reduces odd-order harmonics without increasing supply current. Its unity-gain stability and 5.1 MHz gain-bandwidth product support high-fidelity signal conditioning in G = 1 to G = 100 configurations.

It features internal phase-reversal protection that clamps output voltage instead of inverting polarity when inputs exceed common-mode range (–40°C to +125°C), and integrates ESD protection rated to ±3000 V HBM and ±1000 V CDM - critical for handheld audio device front-ends exposed to user handling.

Key Specifications

Pinout & Package

OPA1692IDGKT is packaged in an 8-pin VSSOP (DGK) with nominal body size 3.00 mm × 3.00 mm, optimized for space-constrained PCB layouts in portable audio devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA1612AIDR and LM4562MAX, the OPA1692IDGKT uniquely balances ultra-low distortion (–127 dB), ultra-low power (650 µA), and robust input protection - making it the only dual op amp qualified for battery-powered, user-handled audio front-ends demanding both fidelity and reliability.

Availability

OPA1692IDGKT is available at Aetrix Electronics and suitable for wireless microphones, portable recording systems, and USB audio peripherals requiring stable component supply, long-term manufacturability, and guaranteed extended temperature performance.

Supply support for OPA1692IDGKT 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 high-performance audio signal chain solutions.

The OPA1692IDGKT belongs to TI's SoundPlus™ audio op amp family, engineered specifically for ultra-low-noise, low-distortion, low-power audio signal conditioning in portable, wearable, and professional audio equipment.

FAQ

What is the maximum supply voltage for OPA1692IDGKT?

The OPA1692IDGKT supports a total supply voltage (V+ to V−) up to 40 V, with recommended operating range from ±1.75 V to ±18 V (or 3.5 V to 36 V single supply). Absolute maximum rating is 40 V across the supply pins - exceeding this risks permanent damage. Operation at ±18 V enables full 17.8 V output swing into 2-kΩ loads, critical for high-headroom audio paths.

Does OPA1692IDGKT support single-supply operation?

Yes, OPA1692IDGKT fully supports 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 with proper input biasing. The OPA1692IDGKT datasheet provides verified single-supply application circuits for microphone preamplifiers and line drivers.

What is the thermal resistance of OPA1692IDGKT in VSSOP package?

The OPA1692IDGKT in DGK (VSSOP-8) package has a junction-to-ambient thermal resistance (RθJA) of 162.2°C/W, junction-to-board (RθJB) of 83.2°C/W, and junction-to-case (top) of 56.9°C/W. These values assume standard JEDEC 2-layer board conditions. For continuous 650 µA/channel operation at +85°C ambient, junction temperature remains well below the 125°C limit - confirming suitability for sealed enclosures in portable audio devices.

Is OPA1692IDGKT pin-compatible with other dual op amps in VSSOP-8?

No, OPA1692IDGKT is not pin-compatible with generic dual op amps like TL072 or NE5532 in VSSOP-8. Its pinout (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+) is specific to TI's dual audio op amp family. Substitution requires PCB layout revision. Always verify pin function mapping using the official OPA1692IDGKT datasheet Figure 3 before redesign.

What is the input bias current specification for OPA1692IDGKT?

The OPA1692IDGKT specifies input bias current of 300–550 nA at 25°C and up to 600 nA over –40°C to +125°C. This low, stable bias current minimizes voltage error in high-impedance microphone bias networks (e.g., 100-kΩ pull-up) and ensures consistent gain accuracy across temperature - critical for calibrated audio measurement equipment and studio-grade preamplifiers.