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Texas Instruments OPA1632DGN
- Part No.:
- OPA1632DGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
OPA1632DGN.pdf
- Description:
- IC AUDIO 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
OPA1632DGN from Texas Instruments is a fully differential audio operational amplifier designed to convert single-ended inputs to balanced differential outputs for high-fidelity signal chains. It delivers 72 V/μs slew rate, 180 MHz gain bandwidth, and ultra-low 1.25 nV/√Hz input voltage noise - enabling low-distortion drive of professional audio ADCs like the PCM1804 in studio mixer front-ends.
For engineers reviewing the OPA1632DGN datasheet, OPA1632DGN pinout, OPA1632DGN application, or OPA1632DGN equivalent, key selection criteria include its ±2.5 V to ±15 V dual-supply operation, 0.000028% THD+N at 1 kHz with 2 kΩ load, shutdown current of 0.85 mA (VS = ±5 V), and thermal performance enabled by the HVSSOP-8 PowerPAD™ package.
Technical Context
The OPA1632DGN implements a fully differential architecture with independent input and output common-mode control via VOCM (pin 2), supporting both differential-input/differential-output and single-ended-input/differential-output configurations. Its internal feedback resistors enable precise gain setting without external components in standard G = +1, +2, +5, or +10 configurations.
It features active-high enable logic referenced to V−, with turn-on/turn-off delay of 2 μs and internal 250-kΩ pull-up to V+, allowing default-enable operation when the enable pin is unconnected. Thermal management relies on soldering the exposed thermal pad to a ground or power plane, achieving RθJB = 30.0°C/W in the HVSSOP-8 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain bandwidth product | 180 MHz - supports wideband audio and ultrasonic content up to 100 kHz with flat response and minimal phase error. |
| Slew rate | 72 V/μs - enables full-scale 20 VPP output swing at 100 kHz without slewing-induced distortion. |
| THD + Noise | 0.000028% at 1 kHz, RL = 2 kΩ - meets professional audio dynamic range requirements (>130 dB SNR). |
| Input voltage noise | 1.25 nV/√Hz - preserves signal integrity in low-level microphone preamp stages before ADC sampling. |
| Supply range | ±2.5 V to ±15 V - accommodates portable battery-powered and high-headroom studio-grade analog rails. |
| Shutdown current | 0.85 mA at ±5 V - reduces system standby power while maintaining fast 2 μs wake-up for responsive audio routing. |
| Operating temperature | –40°C to +85°C - qualified for industrial and broadcast equipment deployed in uncontrolled environments. |
Pinout & Package
The OPA1632DGN uses an 8-pin HVSSOP (PowerPAD™) package with a thermally enhanced exposed pad that must be soldered to a PCB ground or power plane for reliable thermal dissipation (RθJB = 30.0°C/W). Pin 1 is VIN−; pin 2 is VOCM; pin 3 is V+; pin 4 is VOUT+; pin 5 is VOUT−; pin 6 is V−; pin 7 is Enable; pin 8 is VIN+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | Differential input (non-inverting) | Accepts positive-phase analog signal; common-mode range extends to within 1.5 V of V− and 1 V of V+. |
| VIN− | Differential input (inverting) | Accepts negative-phase analog signal; matched impedance ensures optimal CMRR >74 dB. |
| VOCM | Output common-mode control | Sets DC offset of differential output pair; critical for interfacing with ADCs requiring specific input common-mode voltage (e.g., 2.5 V). |
| VOUT+ | Differential output (positive) | Delivers amplified, phase-aligned output; capable of ±13.4 V swing into 2 kΩ at ±15 V supplies. |
| VOUT− | Differential output (negative) | Delivers complementary inverted output; maintains tight amplitude/phase matching with VOUT+ for <0.01° imbalance. |
| Enable | Active-high shutdown control | Logic high > (V−) + 1.45 V enables amplifier; internal pull-up ensures default-active behavior if left floating. |
| V+ | Positive supply rail | Supports up to ±15 V; PSRR of 13–316 µV/V minimizes supply ripple coupling into audio path. |
| V− | Negative supply rail | Reference for enable threshold and input common-mode range; must remain stable during shutdown transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Converts single-ended source signals to balanced differential outputs without external transformers or discrete op-amp pairs - reducing even-order harmonics and common-mode noise pickup. |
| Ultra-low THD+N | 0.000028% at 1 kHz with 2 kΩ load enables transparent signal reproduction in mastering-grade audio paths where harmonic artifacts are perceptible below –115 dB. |
| High-speed performance | 72 V/μs slew rate and 1.8 MHz large-signal bandwidth ensure accurate transient response for percussive audio transients and digital audio reconstruction filters. |
| Thermally optimized HVSSOP-8 | Exposed PowerPAD™ thermal pad achieves 30.0°C/W junction-to-board resistance - enabling sustained 13 mA quiescent current operation in compact audio modules without forced airflow. |
| Integrated shutdown control | 2 μs turn-on/off delay and 0.85 mA shutdown current allow dynamic power gating in multi-channel audio systems without audible pop/click artifacts. |
Applications
| Professional Audio Mixer Front-End | Studio Microphone Preamp |
|---|---|
Use Scenario: Converting mic-level XLR signals to differential format prior to high-resolution ADC conversion in digital mixing consoles. IC Role / Device Role / Timing Role: Fully differential amplifier providing gain, common-mode level shifting (via VOCM), and noise-rejecting balanced drive. Use Value: 1.25 nV/√Hz input noise and 0.000028% THD+N preserve low-SPL detail and transient fidelity across 20 Hz–20 kHz bandwidth. |
Use Scenario: Low-noise amplification of condenser microphone capsules with variable gain and selectable output common-mode voltage. IC Role / Device Role / Timing Role: Single-ended-to-differential converter with programmable VOCM for flexible ADC interface alignment. Use Value: ±2.5 V to ±15 V supply range supports both battery-powered field recorders and rack-mounted studio units without redesign. |
| Class-D Amplifier Predisposer | High-Fidelity Soundbar Signal Chain |
Use Scenario: Driving the input stage of high-power class-D amplifier ICs requiring differential inputs and wide dynamic range. IC Role / Device Role / Timing Role: High-current, low-impedance differential driver with 0.22 Ω closed-loop output impedance at 100 kHz. Use Value: 72 V/μs slew rate prevents slew-induced distortion during PWM modulation edge transitions, preserving audio clarity. |
Use Scenario: Signal conditioning between DSP output and multi-channel DACs in space-constrained soundbar PCB layouts. IC Role / Device Role / Timing Role: Compact HVSSOP-8 FDA delivering balanced outputs with minimal board area and thermal footprint. Use Value: RθJB = 30.0°C/W allows continuous operation at 13 mA IQ in sealed enclosures without heatsinks or thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4561IDGKR | Lower input voltage noise (0.95 nV/√Hz), but higher THD+N (0.00005%) and narrower GBW (120 MHz); no integrated VOCM buffer. | Better suited for ultra-low-noise sensor interfaces than high-fidelity audio; requires external VOCM circuitry for ADC alignment. | Select when absolute minimum input noise dominates over harmonic linearity and system integration simplicity. |
| LMH5401RTVT | Higher slew rate (12,000 V/μs), wider bandwidth (18 GHz), but significantly higher quiescent current (45 mA) and no shutdown function. | Targeted at RF and video signal chains; excessive bandwidth and power make it overdesigned and thermally challenging for audio-only use. | Choose only for mixed-signal systems requiring simultaneous audio and high-frequency data acquisition on shared PCBs. |
Compared with THS4561IDGKR and LMH5401RTVT, the OPA1632DGN uniquely balances ultra-low THD+N, industry-leading noise performance, integrated VOCM control, and low-power shutdown - making it the optimal choice for cost-sensitive, thermally constrained, high-fidelity audio signal chains requiring production-ready integration.
Availability
OPA1632DGN is available at Aetrix Electronics and suitable for professional audio mixers, studio microphone preamplifiers, and high-end soundbar designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for OPA1632DGN 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 conditioning.
The OPA1632 belongs to TI's OPA high-performance audio op-amp family, engineered specifically for professional and prosumer audio equipment demanding ultra-low distortion, wide bandwidth, and robust thermal behavior in compact packages.
FAQ
What is the maximum supply voltage rating for the OPA1632DGN?
The OPA1632DGN has an absolute maximum supply voltage of ±16.5 V per rail. Operating beyond this risks permanent damage. For reliable long-term operation, TI specifies ±15 V as the maximum recommended dual-supply voltage, ensuring full electrical performance across –40°C to +85°C ambient conditions. The OPA1632DGN maintains specified THD+N, noise, and bandwidth within this range.
How does the VOCM pin function in the OPA1632DGN?
The VOCM pin (pin 2) sets the DC common-mode voltage of the differential output pair (VOUT+ and VOUT−). When driven with a stable reference (e.g., 2.5 V), it centers the output swing around that voltage - essential for interfacing with ADCs like the PCM1804 that require precise input common-mode levels. The OPA1632DGN's VOCM input has high impedance and tracks accurately across temperature, enabling flexible system-level level-shifting without external op-amps.
Can the OPA1632DGN operate from a single supply?
Yes, the OPA1632DGN supports single-supply operation from 5 V to 30 V, as confirmed in Section 6.3 of the datasheet. In single-supply mode, the input common-mode range extends from (V−) + 1.5 V to (V+) − 1 V, and VOCM must be biased within that range. However, its fully differential architecture and optimal THD+N performance are most commonly leveraged in dual-supply ±5 V to ±15 V configurations used in professional audio gear.
What thermal design considerations apply to the OPA1632DGN HVSSOP-8 package?
The OPA1632DGN in the DGN (HVSSOP-8) package requires soldering its exposed thermal pad to a PCB copper plane - either ground or power - to achieve the rated RθJB = 30.0°C/W. Floating the pad causes junction temperature to rise sharply, risking thermal shutdown or accelerated aging. TI recommends ≥200 mm² of 2-oz copper connected via ≥4 thermal vias (0.3 mm diameter) to inner layers for reliable 13 mA quiescent current operation in enclosed audio modules.
Is the OPA1632DGN pin-compatible with other Texas Instruments FDAs?
No, the OPA1632DGN is not pin-compatible with TI's THS4561 or LMH5401 families. Its 8-pin HVSSOP layout (VIN−, VOCM, V+, VOUT+, VOUT−, V−, Enable, VIN+) is unique to the OPA1632 series. Substituting alternate FDAs requires PCB layout revision due to differing pin functions - especially the dedicated VOCM input and active-high Enable pin placement. Always verify pin mapping against the specific device's datasheet before redesign.
OPA1632DGN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Audio
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 50V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 180 MHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 14mA
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
OPA1632DGN FAQ
1.How can I place an order for OPA1632DGN through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA1632DGN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for OPA1632DGN reliable?
The price and inventory of OPA1632DGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA1632DGN is usually 5 days.
3.What payment methods are accepted for OPA1632DGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA1632DGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA1632DGN?
OPA1632DGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA1632DGN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for OPA1632DGN?
For technical support, including OPA1632DGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA1632DGN requirements.
6.How does Aetrix verify that OPA1632DGN is sourced from the original manufacturer or authorized distributors?
All OPA1632DGN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that OPA1632DGN meets industry standards.
7.What is the process for return or replacement of OPA1632DGN?
All OPA1632DGN units undergo pre-shipment inspection (PSI). If there is an issue with OPA1632DGN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The OPA1632DGN part is unused and in its original packaging.
Return procedure for OPA1632DGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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