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Texas Instruments DRV632PW
- Part No.:
- DRV632PW
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
DRV632PW.pdf
- Description:
- IC LINE DRIVER 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:901
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Product details
Overview
DRV632 from Texas Instruments is a stereo DirectPath™ audio line driver IC designed for ground-referenced 2-VRMS output generation in single-supply systems. It delivers <0.01% THD+N at 2 Vrms into 10 kΩ, supports ±1 to ±10 V/V adjustable gain per channel via external resistors, and integrates a charge pump to eliminate DC-blocking capacitors-enabling pop-free audio in set-top boxes and LCD TVs.
For engineers reviewing the DRV632 datasheet, DRV632 pinout, DRV632 application, or DRV632 equivalent, key selection criteria include its 3.3-V supply operation, differential input/single-ended output architecture, 600-Ω minimum load compliance, ±8-kV IEC ESD protection on outputs, and active mute with external undervoltage detection capability.
Technical Context
The DRV632 employs TI's patented DirectPath™ architecture with an internal charge pump generating a negative rail (PVSS), enabling true ground-referenced 2-VRMS output without output coupling capacitors. Its dual-channel opamp structure accepts differential inputs and provides individually configurable gain using external RIN/RFB networks.
It features integrated click-and-pop suppression, short-circuit protection, and an external undervoltage protection (UVP) input (pin 11) with 1.25-V threshold and 5-µA hysteresis current. Mute control is active-low (pin 5), and both channels support second-order active low-pass filtering when configured with external RC networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.4 Vrms typical into 10 kΩ @ 3.3-V supply - enables direct interface with line-level consumer audio inputs without level-shifting. |
| THD+N | 0.002% typical @ 2 Vrms, 1 kHz - ensures high-fidelity audio reproduction with minimal harmonic distortion. |
| SNR / DNR | 105 dB A-weighted - provides wide dynamic range for clean signal transmission in noise-sensitive environments. |
| Gain Range | ±1 V/V to ±10 V/V per channel - allows precise signal scaling using external resistors (e.g., RIN=15 kΩ, RFB=30 kΩ for ×2). |
| Load Compliance | 600 Ω minimum - supports standard line-driver loads including professional audio interfaces and broadcast equipment. |
| ESD Protection | ±8 kV IEC 61000-4-2 on OUTL/OUTR - reduces need for external TVS diodes in end-equipment design. |
| Supply Current | 14 mA typical @ 3.3 V, no load - enables low-power operation in battery-backed or energy-conscious systems. |
Pinout & Package
The DRV632 is housed in a 14-pin TSSOP package (5.00 mm × 4.40 mm body size), optimized for compact audio subsystem layouts and automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +INR (Pin 1) | Right-channel non-inverting input | Differential input node requiring AC-coupling capacitor; sets common-mode bias point for right channel. |
| –INR (Pin 2) | Right-channel inverting input | Completes differential pair; used with +INR to reject common-mode noise and enable gain configuration. |
| OUTR (Pin 3) | Right-channel output | Ground-referenced 2-VRMS line driver output with ±8-kV IEC ESD rating; no DC-blocking cap required. |
| GND (Pins 4, 10) | Power ground | Dual ground pins minimize ground loop impedance and improve PSRR performance across both channels. |
| Mute (Pin 5) | Active-low mute control | Asserting low disables outputs with built-in click/pop suppression; compatible with microcontroller GPIOs. |
| VSS (Pin 6) | Negative charge-pump rail | Internal PVSS node generated by charge pump; requires 1-µF low-ESR ceramic capacitor to GND. |
| CN (Pin 7) | Charge-pump flying capacitor negative | Connects to negative terminal of 1-µF flying capacitor; critical for stable negative rail generation. |
| CP (Pin 8) | Charge-pump flying capacitor positive | Connects to positive terminal of same 1-µF flying capacitor; forms switched-capacitor doubler/inverter. |
| VDD (Pin 9) | Positive supply input | 3.0–3.6 V DC input; requires local 1-µF ceramic decoupling capacitor placed adjacent to pin. |
| UVP (Pin 11) | External undervoltage detect input | Monitors system supply via resistor divider; asserts mute when voltage drops below 1.25 V threshold. |
| OUTL (Pin 12) | Left-channel output | Identical functionality to OUTR; supports independent gain and filtering from right channel. |
| –INL (Pin 13) | Left-channel inverting input | Matches –INR function; enables fully independent left/right channel configuration. |
| +INL (Pin 14) | Left-channel non-inverting input | Matches +INR function; completes differential input pair for left channel with DC-blocking requirement. |
Key Features
| Feature | Design Value |
|---|---|
| DirectPath™ architecture | Eliminates output DC-blocking capacitors - reduces BOM count by ≥2 large electrolytics and saves ≥25 mm² PCB area. |
| Adjustable per-channel gain | Supports independent gain tuning (±1 to ±10 V/V) - enables matched level-setting between L/R channels in asymmetric source paths. |
| Integrated charge pump | Generates clean negative rail internally - avoids external split-supply regulators and associated noise/complexity. |
| Active mute with pop reduction | Ensures zero-audio-transient power-up/down - meets consumer audio requirements for silent switching in STBs and TVs. |
| Differential input stage | Rejects common-mode noise on audio interconnects - improves immunity in noisy digital environments like combo systems and laptops. |
Applications
| Set-Top Boxes | Blu-ray Disc™ Players |
|---|---|
Use Scenario: Audio output stage delivering line-level analog signals to AV receivers or powered speakers. IC Role / Device Role / Timing Role: Stereo line driver providing 2-VRMS ground-referenced output with pop-free mute control. Use Value: Removes need for two 100-µF output coupling capacitors, reducing cost, board space, and low-frequency phase shift. | Use Scenario: Final analog audio buffer before HDMI/SPDIF extraction or legacy RCA outputs. IC Role / Device Role / Timing Role: High-SNR stereo driver supporting wide dynamic range playback from high-resolution audio DACs. Use Value: 105-dB SNR and <0.002% THD+N preserve fidelity of 24-bit/192-kHz content without added noise floor. |
| LCD/PDP TVs | Sound Cards |
Use Scenario: Internal audio routing from main SoC to headphone jack and line-out connectors. IC Role / Device Role / Timing Role: Dual-channel line driver with independent gain control for variable source levels. Use Value: ±10 V/V gain range accommodates both low-output DACs and high-sensitivity downstream stages. | Use Scenario: PC add-in card providing premium analog audio output for gaming or music production. IC Role / Device Role / Timing Role: Low-noise, high-PSRR line driver ensuring clean signal integrity amid digital noise. Use Value: 80-dB input-to-output attenuation when muted prevents audible clicks during Windows audio device switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stereo line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV630PW | Single-channel version; identical gain range, THD+N, and DirectPath architecture but half the channel count. | Suitable only for mono line output or dual-device stereo implementation - increases layout area and BOM count. | Select DRV630PW only when stereo integration is unnecessary or when channel isolation mandates separate ICs. |
| DRV604PW | Lower 2.1-Vrms output, 1-kΩ min load, and no integrated charge pump - requires external negative rail or AC-coupled output. | Cannot achieve true ground-referenced 2-VRMS without additional components; higher THD+N (0.01%) at full scale. | Choose DRV604PW only if system already provides split supply or if cost sensitivity outweighs capacitor elimination benefit. |
Compared with DRV632PW, DRV630PW halves channel density while retaining identical per-channel specs, whereas DRV604PW sacrifices ground-referenced operation and output drive strength to reduce complexity - making DRV632PW optimal for space-constrained, capacitor-sensitive stereo line driver designs.
Availability
DRV632PW is available at Aetrix Electronics and suitable for set-top boxes, Blu-ray players, and LCD TVs requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.
Supply support for DRV632PW 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, embedded processing, and connectivity technologies, with decades of leadership in high-performance audio signal chain solutions.
The DRV632 belongs to TI's DirectPath™ line driver product line, engineered specifically to eliminate output DC-blocking capacitors in consumer and professional audio systems operating from single 3.3-V supplies.
FAQ
What is the maximum load impedance supported by the DRV632PW?
The DRV632PW is specified to drive loads from 600 Ω up to 10 kΩ. At 10 kΩ, it delivers 2.4 Vrms typical output with <0.002% THD+N. Driving higher impedances (e.g., 50 kΩ) is possible but not characterized - output swing may approach rail limits and THD+N could increase beyond datasheet guarantees. Always verify performance under actual load conditions in final design validation.
Does the DRV632PW require external DC-blocking capacitors on its inputs?
Yes, the DRV632PW requires external DC-blocking capacitors on both differential inputs (+INL/–INL and +INR/–INR) to block source DC offset and ensure proper internal biasing. The datasheet recommends electrolytic or high-voltage ceramic capacitors (e.g., 2.2 µF) to avoid capacitance variation with signal voltage - which can cause low-frequency distortion if standard X7R ceramics are used.
Can the DRV632PW operate from a 5-V supply?
No, the DRV632PW is rated for 3.0–3.6 V supply only. Absolute maximum VDD is 4.0 V; operation above 3.6 V violates recommended conditions and risks parametric degradation or reliability failure. For 5-V systems, use a dedicated 3.3-V LDO regulator - TI recommends low-noise, high-PSRR regulators such as TPS7A47 to preserve audio SNR.
How does the UVP pin (Pin 11) function in the DRV632PW?
The UVP pin on the DRV632PW monitors system supply voltage via an external resistor divider. When voltage at UVP falls below 1.25 V, the device mutes its outputs to prevent pop noise during brownout or shutdown. Hysteresis (~5 µA) ensures clean release; TI provides design equations to set custom thresholds - e.g., 3.8 V trip with 1-V hysteresis using R1=3 kΩ, R2=1 kΩ, R3=50 kΩ.
Is the DRV632PW pin-compatible with other TI DirectPath line drivers like DRV603PW?
No, the DRV632PW is not pin-compatible with DRV603PW or other members of TI's DirectPath family. Pin assignments differ significantly - for example, DRV603PW uses different pin locations for VSS, CP, and CN, and lacks dedicated UVP and CN/CP pins. PCB layout must be redesigned for each part; refer to individual datasheet pin diagrams before substitution.
DRV632PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- DirectPath™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Line Driver
- Applications:
- Pre-Amplifier, Consumer Audio
- Number of Channels:
- 2
- Interface:
- Analog
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Specifications:
- Single-Ended Output
- Mounting Type:
- Surface Mount
- Grade:
- -
DRV632PW FAQ
1.How can I place an order for DRV632PW through Aetrix?
Please submit a Request for Quotation (RFQ) for DRV632PW 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 DRV632PW reliable?
The price and inventory of DRV632PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DRV632PW is usually 5 days.
3.What payment methods are accepted for DRV632PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DRV632PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DRV632PW?
DRV632PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DRV632PW 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 DRV632PW?
For technical support, including DRV632PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DRV632PW requirements.
6.How does Aetrix verify that DRV632PW is sourced from the original manufacturer or authorized distributors?
All DRV632PW 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 DRV632PW meets industry standards.
7.What is the process for return or replacement of DRV632PW?
All DRV632PW units undergo pre-shipment inspection (PSI). If there is an issue with DRV632PW, 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 DRV632PW part is unused and in its original packaging.
Return procedure for DRV632PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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